D06A Hardwood Specification Guide

Revision 02- December 2018

D06A - SPECIFICATION GUIDE 09 64 29 - HARDWOOD FLOORING

D06A-1 General
D06A-2 Products
D06A-3 Execution

SPEC NOTES:

Refer to Part A16 - Specification Guides before using this specification.
This specification has been prepared to assist design professionals in the preparation of a project or office master specification used to specify solid and engineered strip, plank, and parquet hardwood flooring.
This specification section assumes the project manual will contain complete Division 1 - General Requirements sections and close coordination with it is required. If the project manual does not contain these sections, additional information should be included under appropriate articles.
This Section number (09 64 29) including Section references noted under Related Work Specified Elsewhere is based on the MasterFormat 2004 numbering system. Note that where individual specification sections are required for hardwood flooring and hardwood sports flooring the Section numbers should be revised to 09 64 29, for wood strip and plank flooring and 09 64 66 for sports flooring.
This specification is directed to the (General) Contractor (or Construction Manager). Where there is no General Contractor substitute the term Flooring Contractor.
Review all requirements noted herein and carefully choose those that meet project requirements. The Specifier must choose one item from a series of items surrounded with [ .. ] brackets such as [Contractor] [Construction Manager] [Consultant] and delete the remainder. Items surrounded with ( ) brackets are additional information / comments that should be left in the specification.
Adding or deleting items in this specification must be done with care and caution. The onus of doing so rests with the Specifier who must have a complete and thorough understanding of what is required. Where additional information must be added to this specification the Specifier must ensure that such information is not only accurate but also in accordance with NFCA requirements. Because of the above noted requirements NFCA strongly recommends that this specification be edited by a qualified specification writer (refer to Part A16 - Specification Guides, 1.02).
This specification is not set-up with auto-numbering. Any changes (additions or deletions) therefore means that the specifier will have to re-number / re-space following items to suit.
Revise header and footer to suit project requirements. As a suggestion insert project name particulars on left side of header and consultant name on bottom left and issue date on bottom right of the footer.

1 • GENERAL

1.1 Description:

SPEC NOTES:
.1     This article (1.1) is not intended to scope hardwood flooring work but to serve as a general description. The onus of defining the extent of this section of Work remains with the General Contractor, who will ensure that the area / scope of responsibility of any particular Subcontractor / supplier is set out in full detail when awarding the contract for hardwood flooring work. The extent of this section of Work is also governed by the limits of local trade agreements and conditions. This article should be used in conjunction with Related Work.
.2     Subfloor preparation work is not included under this section, except as noted in Part D04A - Installation Guide - Scope of Work. If extended preparation work is required, this must be specified and a Separate Bid used or a Separate Price requested for this work as necessary. Refer to Part A12 - Substrate Preparation, Part A13 - Patching and Filling, and Part A16 - Specification Guides for information.
.3     Existing flooring to be removed is normally included in demolition work (in Division 02) by the General Contractor. If flooring removal is the only demolition work, removal requirements could be included herein as an additional cost except where it contains asbestos as noted below. Refer to Part A10 - Acceptable Conditions and Part D04A - Scope of Work.
.4     Labour requirements for the removal of asbestos-containing flooring materials and adhesives and/or any other hazardous flooring material must be Bid under a separate contract prior to the start of any new floor covering work. (Refer to Part A10 - Acceptable Conditions and Part D04A - Installation Guide - Scope of Work).

.1 Section Includes: All labour, materials, equipment and services to fabricate, supply and install hardwood flooring to areas noted on the drawings and as specified herein.
.2 The work shall also include:

SPEC NOTES:
.1 The following complies with Part D04A - Installation Guide - Scope of Work and excludes maintenance data and cleaning instructions. Other jurisdictions may vary. The specifier must verify these requirements with the applicable Provincial Floor Covering Association and local trades.
.2 Delete, revise, or add to sample items listed below to suit project requirements as required.

.a   [vapour barrier] [underlayment].
.b   [resilient pads and sleepers] [resilient blanket underlayment].
.c   fastenings, channels / clips and/or adhesives.
.d   [vent cove base] [wood base (and quarter round if required)].
.e   [associated mouldings, trim and accessories such transitions to other flooring materials] [and thresholds at entries].
.f    matching wood stair components (ends or treads, risers and stringer facings) as detailed.
.g   [factory] [site] applied bleaches, stains, seals, and finishes as noted herein.
.h   game line painting for sports flooring (in accordance with Section 09900 requirements).
.i    supply only of floor sockets in accordance with Section [11 66 00] [Division 16].
.j    removal of hardwood material packaging and remnants.

.3 The following shall be supplied by others:

SPEC NOTE: Use the following (items .4 and .5) only as required. Clauses may be revised to suit specification and/or form of Contract requirements as required.

.4         This Section along with the drawings forms part of the Contract and is to be read, interpreted, and coordinated with all other parts.
.5         Division 00 - Procurement and Contracting Requirements and Division 01 - General Requirements form an integral part of this Section of Work.
.6         Related Work Specified Elsewhere: Related work includes but is not necessarily limited to the following:

SPEC NOTES:

.1 This lists work related to this section but not to be included as part of this section. Delete, revise, or add to example selections listed below to suit project requirements as required and coordinate items with other Sections of Work in the Project Manual. This is not a comprehensive list. Refer to CSC MasterFormat 2004 for relevant Section numbers under each Division.
.2 Existing flooring to be removed is normally included in Division 2 if other demolition work is also required. If flooring work is a single contract removal should be included in this Section.

Section 02 40 00    Demolition / Alterations (removal / disposal of existing floor finishes)
Section 02 42 10    Existing Flooring Removal (for flooring only)
Section 02 82 00    Facility Remediation (hazardous material removal)
Section 03 30 00    Cast-in-Place Concrete (substrates including topping and finishes)
Section 03 54 15    Cementitious Underlayment (for levelling)
Section 06 10 00    Rough Carpentry (subfloor framing and sheathing)
Section 06 20 00    Finish Carpentry (panel underlayment)
Section 06 40 00    Architectural Woodwork (wood bases, stair posts and railings) [if supplied separately by others]
Section 07 92 00    Caulking and Sealants
Section 07 95 00    Expansion Joints (systems for floors)
Section 08 71 00    Hardware (thresholds by others)
Section 09 30 00    Tiling (transitions to hardwood flooring)
Section 09 65 00    Resilient Flooring (resilient base and transitions to hardwood flooring)
Section 09 68 00    Carpet Flooring (transitions to hardwood flooring)
Section 09 90 00    Painting (requirements for game line layouts)
Section 11 66 00    Gymnasium Equipment (including floor sockets)
Division 23             Heating, Ventilation, and Air Conditioning (floor grilles, etc.)
Division 26             Electrical (floor outlets / boxes for power and communications, etc.)

1.2 Reference Standards:

.1 The latest edition of the Floor Covering Reference Manual issued by the National Floor Covering Association of Canada (NFCA) shall govern all materials
and workmanship. Whenever reference is made within this specification to NFCA requirements it shall mean, as a minimum, those standards and requirements noted in the NFCA Reference Manual.
.2 The latest applicable edition of the following reference standards shall also govern all materials and installation work specified herein as applicable:

SPEC NOTE: Select appropriate standards and delete all others.

Hardwood Plywood Manufacturers Association (HPMA).
Grading Rules of Maple Flooring Manufacturers Association (MFMA).
Official Floor Grading Rules issued by the National Wood Flooring Association (NWFA).
American Parquet Association (APA).
American National Standard for Laminated Hardwood Flooring by ANSI/HPMA LHF.
American National Standard Institute:
-        ANSI/HPVA HP-1, Standard for Hardwood and Decorative Plywood.
-        ANSI/HPVA EF, Standard for Engineered Wood Flooring.
International Standards Organization:
-        ISO 631, Mosaic parquet panels - General characteristics.
-        ISO 1072, Solid wood parquet - General characteristics.
European Norm Standards:
-        EN 13226, Wood flooring - Solid element with grooves and/or tongues.
-        EN 13227, Wood flooring - Solid lamparquet products.
-        EN 13228, Wood flooring - Solid wood overlay flooring including blocks with an interlocking system.
-        EN 13488, Wood and parquet flooring - Mosaic parquet.
-        EN 13489, Wood and parquet flooring - Multilayer parquet.
-        EN 13629, Wood flooring - Solid pre-assembled hardwood boards.
CAN/ULC-S102.2, Standard Method of Test for Surface Burning Characteristics of Flooring, Floor Covering and Miscellaneous Materials and Assemblies.
Hardwood Flooring and Radiant (Heated Floors) by the Radiant Panel Association (RPA)
Workplace Hazardous Materials Information System (WHMIS).

1.3 Quality Assurance:

.1         All materials, preparation, and workmanship shall be in strict accordance with NFCA requirements and flooring manufacturer's written recommendations, specifications, and detail requirements for types of materials and conditions of work that apply for guarantee / warranty periods noted.

.2         Any work which does not meet NFCA Quality Assurance requirements shall be replaced / repaired by the hardwood flooring installer at no additional cost to the Owner and to the satisfaction of the Consultant (and the Floor Covering Inspector when applicable).

.3         The hardwood flooring contractor shall be recommended by the manufacturer / supplier as qualified for installation of specified flooring materials and must have a minimum of two (2) years local experience and have successfully completed a minimum of five (5) projects with the same or similar materials and quantities as this project.

.4         The hardwood flooring contractor shall maintain a crew of skilled and competent persons throughout the duration of work to satisfy specification and work schedule requirements.

SPEC NOTE:    Use the following clause on large commercial / institutional projects and where the Quality Assurance Program is used.

.5         Only persons who are Trade Qualified or Product Qualified in accordance with NFCA Part A05 requirements shall be engaged in the installation of hardwood flooring. Include the following if the project is under union jurisdiction [Apprentices may be employed provided they work at all times under the direct supervision of a Trade Qualified person. The ratio of apprentices to journey persons employed on site must not exceed the ratio outlined by local trade regulations.]

SPEC NOTE:    Use the following (1.4) where the Quality Assurance Program is available from the Provincial Flooring Covering Association or other designated Quality Assurance provider in the area of this work. Refer to Part A04.

1.4 Inspection Requirements:

.1         All work performed shall be inspected in strict accordance with NFCA Quality Assurance (QA) Program requirements by a qualified (i.e. Quality Assurance Program accredited) Inspection Agency assigned by the Provincial Floor Covering Trade Association. Only Inspectors who have been approved under the Quality Assurance Program shall be assigned.

.2         The appointed QA inspector shall notify the flooring contactor and [Contractor] [Owner] in writing of any substrate defects and potential problems that may affect installation of materials prior to commencement of work.

.3         Fully cooperate with QA inspector at all times in the performance of his/her duties when inspecting on-site areas and substrate surfaces scheduled to receive hardwood flooring.

.4         The cost of inspections including the QA Maintenance Bond shall be included in the cost for this work.

1.5 Testing Requirements:

SPEC NOTES:

1. Refer to Part A11 for substrate testing information and requirements.
2. The NFCA Quality Assurance Program requires that moisture detection testing and not moisture indication testing be conducted to determine vapour emissions from substrate surfaces.
3. Unless otherwise noted, moisture / vapour emission from substrates shall not exceed 3 lbs / 1000 ft2 in 24 hours as determined by the RMA Moisture / Vapour Emission Test.
4. Unless otherwise noted, the alkalinity of substrate surfaces shall not exceed a pH rating of 7.
5. Higher moisture and alkalinity ratings may result in adhesive failure if flooring is glued down and/or degradation / failure of flooring or underlayment.
6. Verify moisture and alkalinity requirements with the flooring manufacturer and amend specified requirements if lower limits are required. Note however that they shall not exceed NFCA ratings.
7. Where there is no General Contractor the flooring contractor shall provide and pay for such testing at an additional cost to the work. Refer to Part D04A - Installation Guide - Scope of Work. When this is the case revise 1.5.2 accordingly.

1          Moisture and alkalinity tests shall be conducted by an independent third party testing agency paid for by the Owner using testing methods and devices in accordance with NFCA requirements and hardwood floor covering manufacturer’s recommendations.

.2         It shall be the responsibility of the General Contractor to provide for such testing in a timely manner.

.3         The final test results must be in compliance with minimum NFCA requirements and hardwood flooring manufacturer’s recommendations, and unless otherwise permitted by the material manufacturer [and approved by the NFCA Quality Assurance Inspector]:

            .a   vapour emissions shall not exceed a rating of 3 lbs./ 1000 ft2 over a twenty-four (24) hour period.
            .b   alkalinity results shall not exceed a maximum pH rating of 7.

.4         Sub-floor surface temperature shall be tested to confirm conditions meet manufacturers requirements.

.5.        Ambient room temperature and ambient room relative humidity shall be tested to confirm conditions meet product manufactures requirements.

.6.       Sub-floor flatness (waviness) shall be tested using a 6' or 10' straight edge (or other suitable means) to confirm conditions meet product manufacturers requirements.

.7         Do not install hardwood flooring materials until testing results indicate that all substrate surfaces are properly cured and acceptable for covering. Report any unsatisfactory conditions in writing to the Contractor.

1.6 Environmental and Safety Requirements:

.1         Ensure that all materials, including adhesives and other accessory products, are environmentally safe and are not prohibited by any applicable laws, regulations, bylaws, ordinances or orders of any government authority.

.2         Ensure that all employees are fully informed and comply, at all times with Workplace Hazardous Material Information System (WHMIS) requirements. Such compliance shall include but not be limited to:

                     .a   Training of staff in the proper handling and storage of such materials.
                     .b   Furnishing and use of workplace Material Safety Data Sheets (MSDS) and labels for such materials.

.3         Environmental sustainability and recycling of hardwood flooring materials:

                      .a   Hardwood flooring materials used shall be manufactured locally or be from a local distribution source.
                      .b   Installations shall use low VOC adhesives, site finishes, sealants, and other related materials.

1.7 Pre-Installation Site Meeting:

.1 Before commencement of work on site, the [General Contractor,] [Construction Manager,] flooring Subcontractor, flooring manufacturer's representative and the [Consultant] [Owner] shall meet to discuss the following items:

Where applicable, removal and disposal of existing floor covering and adhesive materials.
Review of substrate requirements and conditions including substrate finish and level tolerances.
Substrate testing for moisture and alkalinity and provision of written results.
Other testing requirements such as Bond (Pull) Testing, Porosity, surface compressive strength (psi), concrete surface profile (CSP), existing sub-floor surface requirements.
Confirmation of all floor covering materials, i.e., types, patterns / colours and miscellaneous related materials and Mock up.
Scheduling of all flooring work, including material deliveries, handling, storage, conditioning, and staging of work.
Installation requirements, including heating, ventilation, condition and preparation of acceptable substrates, work space lighting and protection of completed work.
Review of details, including, but not limited to (when applicable) seaming, bases, correct drywall finish for cove former, corners, interfaces with adjacent materials, all expansion and movement joints, floor access hatches (where applicable), and flush fit/overlap vent/grill requirements.
Floor pattern and direction and finishing requirements.
Review power requirements for machinery such as floor sanding machines.
Inspection procedures and reports. (Including timing of the four reports for multi-phase projects).
Flooring contractor requirements:
1. Provision of project flooring specifications and applicable drawings.
2. A schedule of materials intended for use on the project and any subsequent addenda.
3. Changes approved by the Specifying Authority, if any, shall be provided to the QA Inspector as approval is secured.
4. Provision of a list of names and qualifications of installers prior to commencement of work.
5. Provision of Consent of Surety (by the flooring contractor) for a 2 year 100% Maintenance Bond.
6. Notification of conditions that do not meet manufacturer and or NFCA standards.
7. Notify the QA Inspector a minimum of five (5) full working days prior to the start of the floor covering work and the same for subsequent site meetings.
Manufacturers to provide maintenance materials and data requirements for cleaning, treatment and maintenance for each type of flooring installed.
Keep minutes of meeting including responsibilities of various parties and deviations from specifications and installation instructions and distribute minutes to attendees within 48 hours

1.8 Mock‑Up: (use for large projects or for complicated layouts)

.1 Prior to installation, install a sample of each type of hardwood flooring on site to area(s) or room(s) designated by the Contractor in accordance with site meeting requirements to show selected materials, installation method, pattern, finish, and fit to walls and doorways, and any other requirements that apply as well as workmanship.

.2 Following completion, the installation is to be reviewed by the Contractor, flooring contactor, flooring manufacturer's factory / distributor representative and Consultant. If accepted, the mock-up sample / room(s) shall serve as the “Standard” of workmanship and materials for all other such work. Do not proceed with balance of installation until such approval has been given.

1.9 Product Delivery, Handling, and Storage:

.1         Handle and protect hardwood flooring during fabrication, curing, storage, transportation and installation by means and methods recommended by the manufacturer and in accordance with minimum NFCA requirements so as to prevent damage, breakage, chipping, splitting, staining or other disfigurement.

.2         Packing and protective materials shall be of a type which will not cause damage, staining or other disfigurement to hardwood.

.3         Ensure that sufficient space with adequate heating and security to store materials, tools and equipment is provided.

.4         Deliver and store hardwood flooring materials in original unopened containers with manufacturer's labels and seals intact.

.5         Store materials in accordance with manufacturer’s requirements in a secure dry space within product temperature and humidity ranges.

1.10 Installation Requirements:

.1 Work under this Section shall be limited to that indicated under the scope of work of this trade including the correction and filling of minor imperfections and irregularities with a non-shrinking latex-based patching / levelling compound and sanding it smooth.

.2 The Contractor shall provide conditions acceptable for the installation of floor covering materials. This shall include the provision of floor levels, finish tolerances, and conditions in accordance with manufacturer’s recommendations and minimum requirements of NFCA Part A10 - Acceptable Conditions including the following:

.a   Substrate surfaces with a maximum level variation of + 3 mm in 1 metre (1/8” in 10 feet). Where this minimum is exceeded the substrate surface shall be rectified by the Contractor before work of this Section proceeds using a self-levelling cementitious topping.

SPEC NOTE:    To ensure the above noted requirement is achieved the level tolerance must be included in the concrete specification and/or a separate cementitious topping specification must be included. Refer to Part D06 - Installation Guide and Part AA6 - Cementitious Underlayment for information.

.b   Concrete substrates machine trowelled to a smooth level surface that are free of all marks, imperfections or conditions that will telegraph through or damage installed flooring materials.
.c   Grinding or sanding of ridges, undulations, projections and areas of carbonation and scaling and filling and levelling of expansion joints, cracks, grooves and other irregularities.
.d   Clean, dry substrate surfaces free of contaminants detrimental to flooring installation (e.g. paint, varnish, oils, release agents, waxes, sealers and curing and hardening compounds not compatible with adhesives employed if flooring is glued down). Surfaces shall be broom cleaned.
.e   Removal of existing flooring material including adhesive.
.f    Environmental conditions prior to and immediately after flooring installation meeting the following criteria:

.i    heating, air conditioning and humidity control facilities in operation.
.ii    substrate moisture content and alkalinity level within manufacturer’s requirements. New concrete and suspect existing concrete surfaces shall be tested in accordance with NFCA requirements by an independent testing agency in a timely manner arranged by the Contractor with costs paid for by the Owner.
.iii   environment and substrate temperatures within manufacturer’s requirements. This includes that the temperature of all materials to be installed and areas to receive flooring is maintained at a minimum of 18oC (65oF) and maximum of 30oC (85oF) for at least 48 hours prior to, during, and after installation, and that a minimum temperature of 13oC (55oF) is maintained thereafter.

.iv   humidity range within manufacturer’s requirements and as a minimum between 35% and 50% assuming an 18oC to 25oC (65oF to 77oF) temperature. If humidity is not within this range, postpone installation until conditions are suitable.
.v   areas to receive flooring shall be vented 24 to 48 hours prior to installation using fresh circulating air and adequate ventilation (for noxious fumes) shall be provided in accordance with WHMIS and WCB requirements.
.vi   areas to receive flooring shall be provided with adequate illumination (minimum of 538 lux at floor level) in accordance with WCB requirements.

Where these minimum requirements are not met they shall be rectified by the Contractor before work of this Section proceeds.

.3         The final type and condition of each substrate shall be in complete accordance with NFCA requirements and the flooring material manufacturer=s installation recommendations.

.4         Condition all flooring materials including adhesives on site to avoid potential expansion, contraction, and bonding problems.

.5         Consult with and coordinate flooring work and make provisions for all trades in advance to avoid future repairs. Refer to other flooring Sections for interface details and base type where applicable.

.6         Install flooring materials only after all other trade work, especially gypsum board and painting, has been completed and all overhead mechanical and lighting work, and other wall-mounted equipment has been installed.

.7         DO NOT proceed with installation until all unsatisfactory conditions have been corrected. Notify the Contractor in writing of all defects likely to impair finished work. Start of work implies acceptance of surfaces and conditions.

.8         Restrict traffic by trades and others until work is completed and until adhesives have fully cured.

1.11 Submittals:

.1         All submittals shall be in accordance with the requirements of Section 01 30 00.

.2         Submit duplicate samples of a minimum of three (3) minimum 400 mm (16") long samples of each type of hardwood flooring specified, finished as specified herein for Consultant's pre‑approval and review of species, grade, grain and finish (stain selection). If there is expected to be some appreciable variation due to the nature of the wood, submit samples to show the expected range of variation.
.3         All submitted samples shall be clearly identified by manufacturer's name, species, grade and the name of the project. Approved samples shall be regarded as the standard for quality within the variation of materials and workmanship that may be expected with good quality control.

.4         Submit hardwood supplier’s specifications of flooring system / assembly and a sample of support system for review and acceptability.

.5         Submit shop drawings to the Consultant for review before commencing installation indicating hardwood flooring layout (plank / strip), patterns, corner and base details as well as floor insert layout and requirements when included.

1.12 Maintenance Data and Materials:

.1 At project completion, provide flooring / sealer manufacturer=s maintenance, cleaning and care data for each type of hardwood flooring installed for incorporation into [each unit] Owner's maintenance manual.

.2 At project completion, provide two percent (2%) of total area or minimum ten (10) square metres (one hundred and ten (110) square feet) from same production run of each type of hardwood flooring installed for Owner=s later use in maintenance.

1.13 Maintenance Bond:

.1 Furnish a 100% Two (2) year Maintenance Bond on completion of hardwood flooring work. The Maintenance Bond shall warrant that the work has been performed in accordance with applicable NFCA Quality Assurance Program requirements.

.2 Provide a facsimile of the bond to be used, together with written proof of ability to furnish the bond at no cost to the Owner with Bid.

1.14 Warranties:

.1 Provide the following warranties beyond date of Substantial Performance in writing as well as any details of other warranties offered that exceed noted minimum requirements:

SPEC NOTE: Review manufacturer’s warranties and revise noted values (what is really available) or ensure they meet minimum requirements noted.

.a   Flooring manufacturer:

-        [Five (5)] year guarantee that hardwood flooring will provide specified level of appearance, subject to proper care and maintenance.

.b   Flooring installer:

-        [One (1)] year against substrate preparation / material installation failures that can be attributed to poor workmanship.

.c   Adhesive manufacturer:

Ten (10) year, including labour and materials, against adhesive failure.

2 • PRODUCTS

2.1 General:

.1         All work shall be based on the use of specified materials. Other hardwood flooring and accessory materials may be approved by the Consultant only before Bid Closing providing they meet or exceed the requirements specified herein. Refer to submittal requirements. No other products will be accepted after Bid Closing.

.2         All materials shall be first quality commercial grade kiln dried to a maximum moisture content of 7% of species and of grade as specified herein. No seconds or substandard products are acceptable.

.3         Species, stain / finish, and patterns of hardwood flooring material shall be as selected by the Consultant from manufacturer=s complete range as indicated on Finish Schedules and/or as noted below.

2.2 Installation Materials:

.1         Substrate Filler: smooth trowelling, fast setting, non-shrinking, non-cracking, pre‑mixed filler with Portland cement and polymeric modifiers (white latex) and a minimum compressive strength of [20 MPa (2900 psi)][27.6 MPa (4000 psi)] at 28 days for patching / filling / levelling substrates, type(s) to suit substrate conditions as recommended by adhesive / hardwood flooring manufacturer.

.2         Substrate Primers and Sealers: as recommended by hardwood flooring manufacturer.

.3         Moisture Barrier Membrane: to CAN/CGSB‑51.34‑M86, 0.15 mm (6 mil) thick polyethylene film to full length of slab area x maximum standard width to reduce joints with membrane tape.

.4         Moisture Barrier Tape: as recommended by moisture barrier manufacturer.

.5         Sheathing Paper: to NFCA requirements, wax vapour barrier type.

.6         Acoustical / Isolation Underlayment: moisture resistant 3 to 6 mm (1/8" to 1/4") thick sheet underlayment of type, density, permeability, and acoustical rating as recommended or pre-approved by flooring manufacturer.

.7         Adhesive: [premium][standard] high strength grade, [low VOC (solvent-free)], alkaline and water resistant type specially formulated for glue-down application of hardwood flooring and to suit material and substrate type and condition as recommended by both adhesive and hardwood flooring manufacturers. Spread rates for adhesive shall be strictly adhered to.

.8         Fasteners: purpose made nails, staples and machine driven fasteners of approved types and sizes listed under NOFMA Nailing Schedule for various applications specified and as recommended by flooring system supplier.

.9         Expansion Joint Strips: cork or other resilient material for installation in voids at perimeter of flooring, with width to suit void. Provide removable blocking to suit.

.10       Specialty Flooring System Components:

SPEC NOTE: Select from the following items and modify as required to suit specialty flooring systems as required.

.a   Subfloor: two layers of 13 mm (1/2") exterior grade Douglas Fir plywood sheathing.

.b   Resilient Underlayment: as specified herein.

.c   Resilient Pads: [11 mm (7/16")] [16 mm (5/8")] [19 mm (3/4")] thick purpose made isolation pads as recommended by flooring system manufacturer, compressible to 1.5 mm (1/16") without permanent displacement under a 275 kPa load.

.d   Perimeter Springs: flat spring steel, nominally 2.5 mm (1/8") thick x 25 x 225 mm (1" x 9").

.e   Sleepers: 38 x 64 x 1220 mm (2" x 3" x 48") kiln dried spruce, pine or fir (preservative treated as required) with minimum of five resilient pads stapled to bottom side.

.f    Resilient Channel and Clips: purpose made minimum 16 gauge zinc plated steel clips and channels to manufacturer's requirements.

2.3 Hardwood Flooring:

.1 Hardwood Flooring: to NFCA specification requirements, kiln dried (and preservative treated) to a maximum moisture content of 7%. Each bundle of flooring to be stamped with MFMA mill grading mark and manufacturer. Provide following types:

.a   Solid Strip Flooring: [10 mm (3/8")] [3 mm (1/2")] [9 mm (3/4")] [20 mm (25/32")] [26 mm (33/32")] thick x [38 mm (1 1/2")] [50 mm (2")] [57 mm (2 1/4")] wide, tongue and groove solid boards with square edges and ends in random lengths and end matched for nail-down installation.

.b   Solid Plank Flooring: to NOFMA requirements, [19 mm (3/4")] [22 mm (7/8")] thick x 76 to 203 mm (3" to 8") wide, tongue and groove boards with [bevelled] [square] top edges [and ends] in [same] [alternate or random] widths and random lengths [and factory installed hardwood pegs] for nail-down installation.

SPEC NOTE:    Note that the following engineered / laminated plank flooring is not laminate flooring.

.c   Engineered Plank Flooring: [10 mm (3/8")] [16 mm (5/8")] thick x 76 to 178 mm (3" to 7") wide, tongue and groove three ply laminated planks in random lengths conforming to ANSI/HPMA LHF with lumber core and top or wear face veneer of selected hardwood and [bevelled] [square] top edges for [glue-down] [nail-down] [clip system] installation.

.d   Solid Parquet Flooring: [paper faced] [web-backed or mesh-backed] panels of [8 mm (5/16")] [19 mm (3/4")] thick solid [same] [contrasting] species wood slats in pattern indicated complete with square edges [except may be tongue and groove to interlock joints] for glue-down installation.

SPEC NOTE:    Note that the following engineered / laminated parquet floorings are not laminate flooring.

.e   Engineered Parquet Flooring: [paper faced] [web-backed or mesh-backed] panels of [10 mm (3/8")] thick, three-ply laminated wood slats with top veneer face of [same] [contrasting] species conforming to ANSI/HPMA LHF in pattern indicated complete with square edges for glue-down installation.

.f    Self‑Adhesive Engineered Parquet Flooring: [8 mm (5/16") thick x 300 mm (12") square solid] [10 mm (3/8") thick x [75 mm (3") x 230 mm (3" x 9")] [230 mm (9") square] laminated wood slat units as noted above with self-adhesive (peel and stick) backing for glue-down installation.

.g   Acrylic Impregnated Wood Flooring: 8 mm (7/16") thick x [insert width] uniformly dyed, permanently fused acrylic plastic (methyl-acrylate monomer) impregnated wood flooring with high abrasion resistance and hardness, [with fire retardant additive to obtain a flame spread rating of 75 or less] of species, grade, size and pattern as selected by the Consultant from manufacturer's standard range, for glue-down installation.

.h   Strip Block Flooring: [25 mm (1")] [38 mm (1 1/2")] [50 mm (2")] [64 mm (2 1/2")] thick x 89 to 140 mm (3 2" to 5 2") wide selected kiln dried edge grain wood strip blocks, turned on end and precision machined four sides and with bottom edges bevelled and back side grooved for surplus mastic, assembled with soft aluminum wire spline into flexible strips [tongue and groove construction optional] of species, grade, size and pattern as selected by the Consultant from manufacturer's standard range, for glue-down installation.

.2         Species / Grade: [paper-faced] [web-back or mesh-back], [NOFMA] [MFMA] [Select & Better] [Natural & Better] [Rustic & Better] [Rustic] [Cabin & Better] [Cabin] grade [Ash] [Beech] [Birch] [Cherry] [Northern Hard Maple] [Red] [White] Oak] [Pecan] [Pine] [insert other species] [solid] [veneer] stock.

.3         Cut: [plain] [quarter] [rift] sawn in [random] lengths, [flat] [insert other] grain.

.4         Pattern: material to suit [Standard] [Antique Textured (kerf-sawn and wire brushed] [Monticello] [Haddon Hall] [Herringbone] [Saxony] [Canterbury] [Rhombs] [Basket Weave] [Italian & Domino] [Chaucer] pattern.

.5         Finish: [factory finished] [unfinished for sanding and finishing on site] as noted herein.

SPEC NOTE:    Use the following where a specific hardwood flooring manufacturers / systems are selected.

.6         Pre‑approved Materials / Systems: The following hardwood flooring manufacturers have been pre-approved subject to meeting specification requirements.

SPEC NOTES:
1. Where different hardwood flooring systems are used on the same project, define each in specification and differentiate on drawings and Finish Schedule by number / name using following example:

.1   WDF1 - Typical wood flooring.
.2   WDF2 - Gymnasium flooring.
.3   WDF3 - Multi‑Purpose Room flooring.

Where different hardwood flooring system finishes are used on the same project, differentiate on drawings and Finish Schedule by defining finish by noting finish type, e.g., Type 1 Finish, etc.

2.4 Hardwood Stair Materials:

.1         Material: S4S kiln dried, solid stain grade stock hardwood, to sizes, details and/or as required, with species, grade. cut and finish to match hardwood flooring.

.2         Treads: one piece [bullnose][square] nosing [by full tread width] [tread ends suitable for stair carpeted using runner material].

.3         Risers: one piece [by full tread width] [riser ends suitable for stair carpeted using runner material].

.4         Stringers: one piece full depth plus base height of species to match flooring.

.5         Balusters, Posts, and Railings: refer to Section 06 40 00.

2.5 Finishes:

.1         Wood Filler: to minimum NFCA requirements and as recommended, supplied and/or pre‑approved by hardwood flooring supplier.

.2         Bleach: to NFCA requirements and as recommended, supplied and specifically approved for use with hardwood flooring.

.3         Dye / Stain: to minimum NFCA requirements and as recommended, supplied and/or pre‑approved by hardwood flooring supplier to match pre-approved sample.

.4         Sealer / Finish: to NFCA requirements and as recommended, supplied and/or pre‑approved by hardwood flooring supplier to match pre-approved sample.

.5         Factory Finish (Engineered and Acrylic Impregnated Flooring): after sanding, finish hardwood flooring materials to minimum NFCA requirements and to hardwood flooring manufacturer’s recommendations using the following material as supplied and applied by hardwood flooring manufacturer:

SPEC NOTE: Select appropriate type of finish and delete all others.

.a   baked pigmented / wax finish to pre‑approved sample.
.b   polyurethane with [gloss] [semi‑gloss] [matte] finish to pre‑approved sample.
.c   polyurethane / [aluminium oxide] [ceramic granule] with [gloss] [semi‑gloss] [matte] finish to pre‑approved sample.
.d   Swedish [gloss] [satin] finish to pre‑approved sample.

.6 Site Finishing: after sanding, finish hardwood flooring materials to minimum NFCA requirements and to product manufacturer's recommendations with dye / stain as selected by the [Consultant] [Owner] with following sealer / finish:

SPEC NOTE: Select appropriate finish and delete all others.

.a   penetrating sealer [and wax].
.b   polyurethane: [gloss] [semi‑gloss] [matte].
.c   water based urethane: [gloss] [satin].
.d   moisture‑cured urethane: [gloss] [satin].
.e   Swedish finish: [gloss] [satin].
.f    varnish: [gloss] [semi‑gloss] [matte].

.7 Game Line Paint: two component, heavy-duty epoxy paint, colours as noted on approved game line layout drawing.

2.6 Accessories and Trims:

.1 Wood Mouldings and Trim: hardwood of species and grade to match flooring, [factory sanded ready for site finishing] [pre-finished to match pre-finished flooring].

.a Base: 19 mm (3/4") x [63.5 mm (2 1/2")] [89 mm (3 1/2")] high.

.b Quarter Round: 19 mm (3/4").

.2         Vented Base: purpose made 100 x 75 mm (4" x 3") heavy duty moulded and vented rubber with matching pre‑moulded exterior corners, colour as selected by the Consultant from manufacturer's standard range.

SPEC NOTE:    Use the following to cover expansion void at wall openings (without doors) and where wood flooring abuts another type of floor finish.

.3         Protective Edgings / Reducer Strips: [hardwood of species and grade matching flooring, [factory sanded ready for site finishing] [pre-finished to match pre-finished flooring] [extruded [bronze] [aluminum with [mill] [anodized] finish and plain surface, full widths and lengths as required.] with profiles to suit conditions and tapered as required.

SPEC NOTE:    Use the following to cover flooring at doors where wood flooring abuts another type of floor finish only as required.

.4 Thresholds:

.a Interior Door Thresholds: [hardwood of species and grade matching flooring, [factory sanded ready for site finishing] [pre-finished to match pre-finished flooring]. [extruded [bronze] [aluminum with [mill] [anodized] finish and plain surface], minimum [50 mm (2") wide x lengths required with flat / barrier free accessible profile.

.b Exterior Door Thresholds: to CAN/CGSB 69.37‑93/ANSI/BMHA A156.21-1989, [barrier free accessible / low profile] [standard] [125 mm (5")] wide extruded [bronze] [aluminum with [mill] [anodized] finish and [plain] [serrated] surface [with skid and corrosion resistant coating], [pile] [vinyl] [silicon self-extinguishing / non-toxic, silicone rubber] weatherseal insert, full width of door plus door frames, notched to suit.

.5 Floor Sockets: cast metal housing to accept threaded inserts, double‑hinged nickel‑bronze lid.

.a Game Post Sockets: for 50 mm socket diameter posts, supplied with threaded bushings, cast equipment / tie-down hooks, and hardware for adaption to floating floors in accordance with requirements of Section 11 66 00]

.b Electrical / Sound System Sockets: [power] [microphone plug-in] in accordance with requirements of [Division 16].

.6 Grout: (fill for floor socket installation) Portland cement and water mix to produce 15 MPa concrete with 75 to 100 mm slump.

3 • EXECUTION

.01 Preparation:

.1         Review all conditions to ensure substrate conditions and levels, environmental conditions and work by other trades is acceptable prior to commencing work including moisture content.

.2         Ensure concrete is tested for moisture (and alkalinity if required and that alkalinity is neutralized) in accordance with NFPA recommendations.

.3         Ensure plywood subfloor installation meets minimum NFCA requirements.

.4         Check substrate levels with a metal straight edge and ensure that they are free from all bumps, ridges, and other imperfections detrimental to flooring installation.

.5         Fill low spots, cracks, joints and holes with substrate filler as required to correct substrate imperfections.

.6         Remove paint, varnish, oils, release agents, waxes, sealers and curing and hardening compounds not compatible with adhesives employed.

.7         Seal and prime substrates in accordance with manufacturer's recommendations.

.8         Sand wood substrates smooth and vacuum clean as required, providing a suitable smooth surface for hardwood flooring installation.

.9         Provide temporary wood blocking at termination / expansion voids (e.g. perimeter walls, openings, etc.).

.10       Where applicable, ensure wood screeds or sleepers to receive hardwood flooring have been installed to minimum NFCA requirements and are level at correct elevation and are at correct centres.

3.2 General Installation Requirements:

.1         Install all hardwood flooring and accessories using tools, materials, methods and sequence of work as recommended by flooring system / manufacturer and to minimum NFCA requirements.

.2         Install all hardwood flooring to areas and patterns detailed and/or shown on approved shop drawings.

.3         Lay hardwood flooring long way of room [and corridor], continuous through doorways and cut to fit all projections with joints straight, true to plane and with minimum half width of plank at perimeters and with variations in shade or pattern disbursed.
.4         Provide expansion void at perimeter (walls and adjacent floor finishes and at openings as required) of floor system to widths in accordance with manufacturer=s recommendations and to minimum NFCA requirements using temporary blocking if and as required.

.5         Install flooring manufacturer’s recommended expansion strip material in expansion void.

3.3 Installation of Flooring Support / Backing System(s):

.1 Install hardwood flooring support / backing systems in strict accordance with flooring manufacturer's written recommendations and minimum NFCA requirements.

1. Barrier Systems: use one of the following:

.a Install [sheathing paper] [moisture barrier] over concrete slabs-on-grade areas lapping joints 150 mm (6") and seal with tape.

OR

.b Install [acoustical] [resilient] underlayment in strict accordance with flooring manufacturer's written requirements and seal joints with tape.

2. Sub-Floor System: use the following and modify to suit selected system:

.a Install [subfloor system of two layers of laminated plywood with resilient pads] [sleeper system using softwood sleepers with resilient pads] [sleeper subfloor system using wood sleepers with resilient pads and laminated plywood subfloor] in accordance with flooring manufacturer's directions and to minimum NFCA requirements.

3. Cushioned Subfloor System: use the following:

.a         Cover concrete slab on grade with membrane damp proofing.

.b         Attach resilient pads to underside of sheathing at 300 mm (12") o.c. and at corners.

.c         Cover floor with sheathing parallel to short dimension of room.

.d         Nail second layer of sheathing to first layer at 600 mm (24") o.c.

.e         Stagger and offset sheathing joints over first layer.

.f         Maintain minimum 6 mm expansion space at joints between sheathing panels.

4. Rubber Cushioned Subfloor System: use the following:

.a         Cover concrete slab on grade with membrane damp proofing.

.b         Attach resilient pads to underside of sleepers at 300 mm (12") o.c. and at ends.

.c         Place sleepers on dampproof membrane and shim and level to manufacturers requirements. Unless otherwise noted, install sleepers parallel to short dimension of room and space at [300 mm (12")] [400 mm (16")] o.c. Stagger sleeper butt joints at a minimum of 300 mm (12").

.d         Maintain minimum [50 mm (2")] expansion space at walls and obstructions.

.e         Install sheathing at right angles to sleepers, stagger and offset joints.

.f         Maintain minimum 6 mm (1/4") expansion space at joints between sheathing panels.

5. Steel Channel Subfloor System: use the following for long strip flooring:

.a         Cover concrete slab on grade with membrane dampproofing.

.b         Anchor channels to concrete slab parallel to short dimension of room and space channels at [250 mm (10")] [400 mm (16")] o.c. Stagger channel joints a minimum of 300 mm (12").

.c         Place resilient insulation board between each row of channels, sides butting channels and end joints 3 mm (1/8") wide.

.d         Place channel isolation strips in channel openings.

Sleeper / Pad System: use the following:

.a Install sleeper / pad system using softwood sleepers on resilient pads (with pads at 250 mm (10") o.c.) spaced in strict accordance with flooring manufacturer's directions and/or to layout pattern as detailed or shown on pre‑approved shop drawings and to minimum NFCA requirements.

7. Channel / Clip System: use the following:

.a Install resilient channels at right angles to length of room fastened to substrate through underlayment in accordance with manufacturer's directions and/or to layout pattern as detailed or shown on pre-approved shop drawings and to minimum NFCA requirements.

8. Adhesive Application System; Use the following:

.a         Apply adhesive over subfloor in accordance with manufacturer's instructions.

.b         Apply no more adhesive than can be covered with flooring before working time expires.

.c         Allow no streaks or lumps in adhesive during application.

.d         Remove adhesive that has set or that has formed surface film before flooring is embedded. Apply fresh coat of adhesive.

3.4 Installation of Hardwood Strip Flooring:

.1         Install hardwood flooring in strict accordance with flooring manufacturer's directions and to minimum NFCA requirements to layout pattern as detailed or shown on drawings and/or pre‑approved shop drawings.

.2         Unless otherwise indicated, install flooring parallel to long dimension of room.

SPEC NOTE:    Select from one of the following:

.3         Install flooring [nailed] [glued] [fixed] to [substrate] [sleepers] [resilient channels] [using proprietary clips system].

.4         Blind nail tongue and groove flooring and face nail square edge flooring with nails or staples of size and spacing in accordance with NOFMA / OFI requirements unless otherwise specified by manufacturer.

OR

.4         Mix and apply adhesives for adhered flooring systems in strict accordance with manufacturer's written instructions, observing recommended trowel notching, spread rates, open times and safety precautions.

.5         Maintain tight joints and board ends.

.6         [Provide supplementary framing for floor socket lid/frame assembly].

.7         Maintain 50 mm (2") expansion space at perimeter of floor surface.

.8         [install spring steel spacers attaching retaining clips to wall at 600 mm (24") o.c.]

3.5 Installation of Hardwood Parquet Flooring:

.1         Install hardwood parquet flooring in strict accordance with flooring manufacturer's directions and to minimum NFCA requirements to layout pattern as detailed or shown on drawings and/or pre‑approved shop drawings.

.2         Install flooring so fields and patterns are developed from centre axis of area covered.

.3         Locate centre axis so that no flooring unit is less than one‑half size.

.4         Install flooring units with aligned joints, leaving 0.4 mm space between units.

.5         Allow 13 mm (2") expansion space at walls or projections in floor area.

.6         Apply flooring units with uniform pressure but avoid working adhesive into joints.

.7         As installation progresses, [and after installation], roll flooring with roller to ensure full adhesion.

.8         Remove a minimum of [6] units before adhesive sets to inspect for complete coverage of adhesive and replace units immediately.

.9         Remove excess adhesive from flooring units.

3.6 Installation of Bases and Trims:

.1         Install wood base (and quarter round if required) over expansion void at perimeter of flooring secured to walls using [nails] [screws and plugs] in accordance with NFCA requirements. Ensure base does not contact floor surface and is not secured to it.

.2         Install wood perimeter mouldings continuous at floor perimeter. Nail to floor with 25 mm finishing nails spaced 300 mm (12") o.c. Double nail joints. Drill mouldings, set nails and fill holes with plastic wood.

OR

.1         Install vented specialty base over expansion void at perimeter of flooring secured to walls only in accordance with manufacturer's directions. Ensure base does not contact floor surface and is not secured to it.

.2         Install protective edgings / reducer strips and hardwood thresholds to all exposed hardwood flooring edges and interfaces with other flooring materials as required to suit conditions, fixed as recommended by the manufacturer and to NFCA requirements.

.3         Install metal thresholds at door openings and where indicated and attach to adjacent rigid floor surface. Threshold to act as ramp between floor surfaces over expansion space.

.4         [Install floor sockets flush, vertically plumb and correctly aligned at locations indicated or pre-approved layout drawings. [Secure socket housing in concrete sub‑floor by grouting, ensuring socket vertical.] Secure lid and frame flush in floating wood floor surface.

3.7 Installation of Stair Coverings:

.1         Install specified treads fitted tightly to horizontal stair faces and adjacent wall surfaces.

.2         Install specified risers fitted tightly to vertical stair faces and adjacent wall surfaces.

.3         Install specified wood stringers fitted tightly to horizontal and vertical stair surfaces and to wall surfaces without gaps or voids.

3.8 Finishing:

.1         Pre-finish hardwood flooring at point of manufacture as specified herein.

OR

.1         Site finish hardwood flooring only after it has been installed and is in place for at least seven (7) days with building temperature and relative humidity and moisture content of flooring maintained within installation parameters before commencing finishing operations.

.2         Prepare and sand installed hardwood flooring in accordance with NOFMA Floor Finishing Manual and in accordance with minimum NFCA requirements.

.3         Remove indentations, grease, oil and other wood defects using multiple grits of sandpaper, scraping, and even sponging and then sanding.

.4         Vacuum clean and carry out final preparation of flooring after completion of sanding in accordance with minimum NFCA requirements for type of flooring.

.5         Sponge surface of flooring with water, alcohol, or solvent to show any areas which may contain glue, marks, oil or uneven sanding.

.6         Apply [filler] [water][oil][alcohol][solvent] based dye] [oil][solvent] based stain] to sanded hardwood using method and application rate in accordance with manufacturer=s written recommendations to achieve finish to match pre-approved sample.

OR

.6         Bleach hardwood flooring using specified bleach prior to the application of finish in accordance with NOFMA Floor Finishing Manual requirements to match pre‑approved sample.

OR

.6         Stain / dye hardwood flooring in strict accordance with stain manufacturer's directions to match pre-approved stain sample.

.7         Apply [penetrating] sealer coats and/or finish coats to hardwood flooring immediately after final sanding in strict accordance with sealer / coating manufacturer's written directions and NFCA minimum requirements, using methods and with number of coats, application and coverage rates in strict accordance with finish manufacturer's recommendations to produce a [matte / satin] [semi‑gloss] [gloss] finish.

.8         Apply [two seal coats of moisture cured urethane finish with first coat reduced 25%] [(one)(two) coat(s) of polyurethane finish] ["Swedish" finish] [water based urethane finish] [varnish finish using a (two)(three) system].

.9         Buff, sand and vacuum flooring after each application of sealer coat and/or finish coat in strict accordance with sealer / finish manufacturer's recommendations and minimum NFCA requirements for materials used and type of flooring installed.

.10       Apply game line markings to gymnasium floor prior to application of final coat of surface finish using compatible enamel in accordance with pre‑approved game line layout and colours [and in accordance with requirements of Section 09 90 00].

.11       Site finish sanded mouldings (base, base shoe, quarter round, reducer strips, etc.) to match finished flooring.

.12       Apply paste wax over sealer or finish when recommended and in accordance with floor finish manufacturer's directions.

3.9 Protection:

.1         Prohibit all other work and traffic other than flooring subtrade from work area during floor installation and finishing.

.2         Avoid static loads on newly installed hardwood flooring until adhesives are thoroughly set.

.3         Do not permit any traffic over finished flooring until final finish coat has dried and cured (for a minimum period of seven (7) days unless otherwise specified by coating manufacturer.).
`
.4         Protect surrounding surfaces from soiling and make good defects caused to other trades' work by hardwood flooring installations.

.5         On completion remove waste, clean and inspect installation for apparent defects and adjust as required. Such cleaning does not include final cleaning for Substantial Performance.
.6         The overall responsibility for the protection of completed hardwood flooring to acceptance by the Owner shall be the responsibility of the General Contractor.

.7         General Contractor shall prohibit traffic except where required and provide temporary protective covers in the form of heavy non‑fibre Kraft paper or red rosin paper with taped joints to restricted traffic areas and subsequently remove and dispose of same.

END OF SECTION