May 15, 2014 Aedis Architects 387 S. First St. San Jose, CA 95113 Subject: Restroom Flooring Replacement at Various Sites New Haven Unified School District Project No. DSA File No. [n/a] DSA Application No. [n/a] ADDENDUM NO. 1 CHANGES AND/OR CLARIFICATIONS OF THE DRAWINGS AND SPECIFICATIONS ARE AS FOLLOWS: SPECIFICATIONS: Architectural ITEM NO. 1.1: 03 55 00: POLYACRYLATE COMPOSITION UNDERLAYMENT Delete: Section 03 55 00 Polyacrylate Composition Underlayment in its entirety. Information has been moved to section 09 67 00 Fluid-Applied Flooring. ITEM NO. 1.2: 09 67 00: FLUID-APPLIED FLOORING Replace: Section 09 67 00 Fluid-Applied Flooring in its entirety with the attached.
ADDENDUM NO. 1 RESTROOM FLOORING REPLACEMENT AT VARIOUS SITES New Haven Unified School District Project No. 5/15/14 Page 2 of 2 DSA File No. [n/a] DSA Application No. [n/a] Thang Do, Architect AEDIS Architecture & Planning Attachments: Cover Sheet 09 67 00 Fluid-Applied Flooring 2
SECTION 09 67 00 FLUID-APPLIED FLOORING THIS SECTION MODIFIED AS PART OF ADDENDUM 1 PART 1 GENERAL 1.01 SECTION INCLUDES Restroom Flooring Replacement at Various Sites A. Fluid-applied epoxy flooring and base, with 10-pound vapor control primer. B. Fluid-applied urethane-cement flooring and base. C. Polyacrylate composition underlayment for fill and/or creating slope for drainage. 1.02 RELATED REQUIREMENTS A. The General Conditions, Supplementary Conditions and Division 1 General Requirements are hereby made a part of this Section as fully as if repeated herein. 1.03 SUBMITTALS A. See Section 01 30 00 - Administrative Requirements, for submittal procedures. B. Product Data: Provide manufacturer's data on specified products, describing physical and performance characteristics; sizes, patterns and colors available. C. Samples: Submit two samples, 2-1/2 x 4 inch ( x mm) in size illustrating color, pattern, and texture for each floor material for each color specified. Provide non-slip texture. D. Samples for Verification: For each resinous flooring system or color specified, provide 2 each, 6 inches (150mm) square samples in the selected color and texture, applied to a ridged backing by the installing contractor for this project E. Manufacturer's Installation Instructions: Indicate special procedures. F. Maintenance Data: Include maintenance procedures, recommended maintenance materials, procedures for stain removal, repairing surface, and suggested schedule for cleaning. (Project Close-Out Item) G. Material certificates signed by manufacturer certifying that each flooring system complies with requirements specified herein. H. Applicator s Certification: submit letter from manufacturer stating that the applicator is authorized to offer a joint applicator/manufacturer labor and material warranty for the work performed on this specific project. 1. Reference jobs: Provide names and contact information for at least 3 projects similar to this project and using the specified system or the proposed equivalent system that are over 5 years old and were installed by this Installing Contracting Company with the crew who will install this project. Reference installations must be within 25 miles of this project. I. Antimicrobial System: EPA licensing documentation and permitting for Antimicrobial System as well as manufacturer s documentation showing the antimicrobial has long-term service life in the cured epoxy and is not an in-can preservative. J. Warranty: Submit written letter from Manufacturer offering joint applicator/manufacturer labor/material warranty for this specific project and with this particular subcontractor-installer. K. Vapor Control System: Submit Manufacturer s technical data for vapor control system. System must be manufactured by the manufacturer of the epoxy mosaic composition flooring product (NO EXCEPTIONS) and be engineered to prevent debonding resulting from vapor emissions up to 10 lbs when tested in accordance with ASTM F-1869 or Alkalinity levels up to 14. L. Submit Manufacturer s technical data for semirigid polymeric joint/crack stripping/waterproofing and antifracture material that that is to be used in conjunction with vapor control system. Rigid or fiberglass-reinforced materials are not acceptable. M. Polyacrylate Underlayment: Submit Manufacturer s technical data for polyacrylate underlayment. Product must be made by the primary materials manufacturer and compatible with the flooring systems specified, and must reach a minimum strength of 2,200 psi. FLUID-APPLIED FLOORING - 09 67 00-1
1.04 QUALITY ASSURANCE A. Single-Source Responsibility: Obtain flooring materials, including primers, resins, hardening agents, colored aggregates and finish or sealing coats, from a single manufacturer (NO EXCEPTIONS). B. Manufacturer Qualifications: Company specializing in manufacturing products specified in this section with minimum three years documented experience. C. Qualified Materials: Request for material approvals for any products other than the specified product must be submitted to the architect two weeks prior to the bid, including complete application specification and physical characteristics. Any request after this date will not be accepted. Failure of performance requires immediate removal and replacement of unapproved substituted material with those originally specified at no cost to the owner, Architect, construction manager, or general contractor. D. Installer Qualifications: Engage an experienced contracting company who has specialized in installing the specified resinous flooring system required for this Project and who offers reference projects as per part 1.03.H.1 of this specification and who is authorized to offer a joint labor and material warranty with manufacturer of primary materials. 1. Installers who have submitted and obtained approval for alternate equivalents to the basis of design product shall have installed the approved alternate for over 5 years and shall provide references and manufacturer s joint warranty letter in compliance with items 1.03.H and J. 1.05 DELIVERY, STORAGE, AND HANDLING A. Deliver materials in original packages and containers with seals unbroken and bearing manufacturer's labels containing brand name and directions for storage and mixing with other components. B. Store materials to comply with manufacturer's directions to prevent deterioration from moisture, heat, cold, direct sunlight, or other detrimental effects. C. Store resin materials in a dry, secure area. D. Store materials for three days prior to installation in area of installation to achieve temperature stability. 1.06 FIELD CONDITIONS A. Environmental Conditions: Comply with epoxy-flooring manufacturer's directions for maintenance of ambient and substrate temperature, moisture, humidity, ventilation, and other conditions required to execute and protect work. B. Lighting: Permanent lighting will be in place and working before installing resinous flooring. C. HVAC: HVAC shall be in full operation during installation and cure period of Resinous flooring. General Contractor shall ensure that the floor temperature remains above 60F at all times. PART 2 PRODUCTS 2.01 MANUFACTURERS A. Fluid-Applied Flooring: 1. Crossfield Products Corp: www.crossfieldproducts.com. a. Contact Richard V. Swan & Associates for acceptable applicators and other information: (650) 992-7100 2. Substitutions: See Section 01 60 00 - Product Requirements. a. Only clear silica aggregate troweled floors with mosaic highlights shall be acceptable. b. Colored quartz, limestone varieties and other aggregates with moh hardness less than 7 are not acceptable. c. Broadcast or quartz floors (including ceramic floors) or any other form of color-coated sand aggregates will not be accepted. FLUID-APPLIED FLOORING - 09 67 00-2
2.02 FLOORING SYSTEM SCHEDULE A. Epoxy Flooring System 1. Toweled epoxy mosaic composition flooring with embedded non-slip aggregate. 2. Thickness: 1/4" nominal when dry. 3. Color: 315 Desert Beige 4. Location: where indicated in the drawings. 5. Top Coat: anti-slip polyurethane, with EPA-licensed antimicrobial/antibacterial system. 6. Underlayment: Polyacrylate underlayment. Provide as required to create slope for drainage and where metal lath is indicated to be installed. 7. Metal Lath: provide metal lath over all plywood and wood substrates. 8. Vapor Control Primer: for use where required by field conditions, see section 3.01.D below. 9. Waterproofing/Antifracture membrane: installed directly below the epoxy mortar layer. Waterproofing/Antifracture Membrane is required only on upper floors or over underlayment used over wood substrates. B. Urethane-Cement Flooring System 1. Urethane-cement flooring with embedded non-slip aggregate. 2. Thickness: 1/4" nominal when dry. 3. Color: 315 Desert Beige 4. Location: where indicated in the drawings 5. Top coat: anti-slip novolac 2.03 MATERIALS A. Epoxy Mosaic Mortar 1. Product: Dex-O-Tex Cheminert Terracolor 2. Physical Properties: a. Thickness: 1/4" b. Compressive Strength (ASTM C 579): 10,000 psi. c. Tensile Strength (ASTM C 307): 1395 psi. d. Flexural Strength (ASTM C 580): 4,300 psi. e. Surface Hardness (ASTM D-2240): Durometer "D" 81 f. Abrasion Resistance (ASTM D 1044 ): 0.0 gr. loss g. Indentation (MIL-D-3134): >1.0 % h. Impact Resistance (Gardner Impact Tester): No chipping, cracking, or delamination and not more than0.014" indentation i. Adhesion (A.C.I. Comm. No. 503.1): >400 psi (100% failure in concrete) j. Electrical Conductivity (NFPA 56A): Di-electric k. Flammability (ASTM E-648/NFPA 253/FTMS 372): Greater than 1.07 watts/cm2 B. Non-slip aggregate: Dex-O-Tex Synthetic Aggregate C. Urethane-Cement Flooring 1. Product: Tek-Crete SL 2. Integral Coved Base: Tek-Crete VRT D. Textured Epoxy Top Coat (Epoxy Flooring System) 1. Type recommended or produced by manufacturer of epoxy resin mosaic flooring system for type and profile of desired final finish. 2. Product: Decorflor epoxy E. Textured Novolac Top Coat (Urethane-Cement Flooring System) 1. Type recommended or produced by manufacturer of urethane-cement flooring system for type and profile of desired final finish. 2. Product: Posi-Tred CR F. Polyacrylate Cement Underlayment 1. Product: Dex-O-Tex A-81 Underlayment 2. Physical Properties: FLUID-APPLIED FLOORING - 09 67 00-3
a. Compressive Strength ASTM C109: 24 hrs: 5000 psi 72 hrs: 6140 psi b. Tensile Strength ASTM C307: 800 psi c. Flexural Strength ASTM C580: 1,200 psi d. Weight: 130 pounds/ft³ e. Hardness ASTM D2240, Shore D: 70-75 f. Adhesion ASTM D4541: >400 psi (100% failure in concrete) g. Indention MIL-D-3134, Para 4.7.4.2.1: 2.26% (Steadily Applied Load, 2,000 lbs. On 1 steel ram imposed for 30 min.) h. Water Absorption MIL-D-3134: 3.14% i. Flammability: Non-combustible j. Impact Resistance (Gardner Impact Tester): No chipping, cracking, or delamination more than 0.014. G. Crack/Joint Sealant and Waterproofing/Antifracture Membrane 1. Product: Dex-O-Tex SC Membrane 2. Physical Properties: a. Tensile Strength (ASTM D 638): 1,500 psi b. Tensile Elongation (ASTM D 638): 17,150 psi, 96% elongation to break c. Tear Strength (ASTM D 638): 120 lb./in. d. Hardness (ASTM D2240, shore D): 35-40 e. Compressive (ASTM ASTM D695): 4,000 psi f. Water Absorption (ASTM D570): <0.2% g. Flammability (ASTM D635): Self-extinguishing over concrete h. Microbial Resistance (ASTM G21) Passes 2.04 ACCESSORIES A. Vapor Control Membrane: 10-pound vapor control primer recommended by the primary materials manufacturer. 1. Product: Vapor Control Primer 200 by Dex-O-Tex. 2. Physical Properties: Provide negative side vapor emissions system that meets or exceeds the listed minimum physical property requirements when tested according to the referenced standard test method. a. Adhesion ASTM D4541 >400 psi (100% failure in concrete) b. Adhesion ASTM D4541 >400 psi (100% failure in concrete, with Moisture Vapor Emission Rate at 10 lbs/1000 sf/24 hours per ASTM F1869) c. Compressive Strength ASTM D695 21,000 psi d. Tensile Strength ASTM D638 5600 psi e. Tensile Elongation ASTM D638 2.7% f. Permeability Rating ASTM E96 Dry <0.18.Wet <0.80 g. Microbial Resistance ASTM G21 Passes h. Alkali Resistance ASTM D1308 Resistant B. Antimicrobial Additive: Incorporate EPA-licensed antimicrobial chemical additive to prevent growth of most bacteria, fungi, algae and actinomycetes. 1. Product: Dexcide Antimicrobial/Antibacterial System C. Expanded wire lath: 3.4# galvanized diamond metal lathing filled with a minimum of ¼ polyacrylate underlayment. Additional underlayment may be installed to create slope for drainage. PART 3 EXECUTION 3.01 EXAMINATION A. Verify that sub-floor surfaces are smooth and flat within the tolerances specified for that type of work and are ready to receive flooring. B. Verify that wall surfaces are smooth and flat within the tolerances specified for that type of work, are dust-free, and are ready to receive flooring. FLUID-APPLIED FLOORING - 09 67 00-4
C. Verify that sub-floor surfaces are dust-free and free of substances that could impair bonding of materials to sub-floor surfaces. D. Verify that concrete sub-floor surfaces are ready for flooring installation by testing for moisture emission rate and alkalinity in conformance with ASTM F 1869 and ASTM F 2170; obtain instructions if test results are not within limits recommended by flooring materials manufacturer. If emissions exceed 10 lbs notify Architect for instructions to install vapor control system. E. Verify that required floor-mounted utilities are in correct location. F. Notify the Architect of conditions detrimental to the proper and timely completion of the work. Do not proceed with the work until unsatisfactory conditions have been corrected by the Contractor in conformance with the Contract Document. 3.02 PREPARATION A. Substrate: Perform preparation and cleaning procedures according to flooring manufacturer's instructions for particular substrate conditions involved, and as specified. Provide clean, dry and neutral substrate for flooring application. B. Concrete Surfaces: Shot-blast or grind as required to obtain optimum bond of flooring to concrete. Remove sufficient material to provide a sound surface free of laitance, glaze, efflorescence, and any bond-inhibiting curing compounds or form release agents. Remove grease, oil, and other penetrating contaminates. Repair damaged and deteriorated concrete to acceptable conditions. Leave surface free of dust, dirt, laitance, and efflorescence. C. Plywood Surfaces: General Contractor must remove damaged and deteriorated plywood and replace with new. Verify plywood surface is flush and level throughout. Remove laitance, grease, and foreign matter. Install expanded wire lath over all wood surfaces to receive underlayment. D. Vapor Control Membrane: Allow slab to cure the minimum prescribed time as required by the manufacturer. Install vapor control membrane and resurfacer in accordance with the manufacturer's written instructions. E. Materials: Mix resin hardener, antimicrobial, and aggregate when required, and prepare materials according to flooring system manufacturer's instructions. 3.03 INSTALLATION - FLOORING A. Apply in accordance with manufacturer's instructions. B. Apply each coat to minimum thickness indicated. C. Polyacrylate underlayment: install where necessary for fill or to create positive slope for drainage. 1. Install in accordance with manufacturer's instructions. 2. Bond Coat: Apply bondcoat/primer over prepared substrate at manufacturer's recommended spreading rate. 3. Body Coat: Over fresh bondcoat/ primer, trowel apply polyacrylate mortar mix at nominal thickness as specified; hand or power trowel. When cured, sand or grind if necessary to remove trowel marks or roughness. D. Bond Coat: Apply bond coat over prepared substrate at manufacturer's recommended spreading rate. Primer is not required for urethane-cement flooring. E. Body Coat; Over primer, trowel apply mortar mix at nominal 1/4-inch Thickness; hand or power trowel. Allow to cure before proceeding. F. Finish or Sealing Coats: After body coat has cured sufficiently, apply grout and finish coats of type recommended by flooring manufacturer to produce finish matching approved sample and in number of coats and spreading rates recommended by manufacturer. 1. Final finish coat shall be In color and skid retardant profile as approved by Architect. 2. Finished floor shall be 1/4-inch thick, uniform in color and free of trowel marks. G. Finish to smooth level surface. FLUID-APPLIED FLOORING - 09 67 00-5
H. Cove Base: Apply cove base mix to wall surfaces at locations shown to form cove base height of 6-inches in a seamless manner forming a minimum 3/8 inch radius cove as an integral unit unless otherwise indicated. Follow manufacturer's printed instructions and details including taping, mixing, priming, troweling, sanding, and top-coating of cove base. I. Floor drains: 1. Drain flange shall be finished flush with substrate. 2. Allow one-eighth (1/8) inch per foot slope in the flooring substrate to drain. 3. Care must be taken to provide adequate elevation at thresholds to provide proper slope to drain. 3.04 PROTECTION A. Cure epoxy mosaic composition and urethane-cement flooring materials according to manufacturer's directions, taking care to prevent contamination during application stages and before completing curing process. Close application area for a minimum of 24 hours. Note full chemical/stain resistance of epoxies is not achieved for 7 days. General Contractor to protect from cleaning and spills for 7 days. B. Prohibit traffic on floor finish for 24 hours after installation. 1. Barricade area to protect flooring until cured. C. Protect finished floor with rosin paper. Additionally, use masonite, if rolling load traffic exists. D. Protect from cleaning and spills for 7 days. E. Clean with manufacturer recommended cleaner. END OF SECTION FLUID-APPLIED FLOORING - 09 67 00-6