Brand Underlayment. Submittal Sheet FIBEROCK

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1 Submittal Sheet FIBEROCK Brand Underlayment Water- and mold-resistant product for all residential underlayment needs Meets underlayment needs in both wet and dry areas throughout the home. Ideal under vinyl, ceramic tile, hardwood flooring, laminate flooring, and carpeting. Provides a smooth, flat surface. Resists indentation from heels and furniture. Free of resins, adhesives, and solvents. Recognized by major resilient-flooring and adhesive manufacturers. Tested by Tile Council of America (Robinson Floor Test Method) and approved for residential and light commercial use (as defined by TCA). Superior adhesive bonding and workability. Certified, recycled content of 95 percent. Description FIBEROCK Brand Underlayment AQUA-TOUGH is engineered to meet both water-, mold- and indentation-resistance needs under resilient flooring, ceramic tile, carpeting, hardwood flooring, and laminate flooring. This all-purpose underlayment manufactured from a specially engineered combination of gypsum and cellulose fibers has a uniform, water-resistant composition that helps prevent the problems typically associated with plywood, oriented strand board (OSB), and lauan underlayments. FIBEROCK Brand Underlayment provides a smooth, flat surface, with no bumps or ridges to telegraph through. It resists water damage such as the swelling and warping often seen with wood-based products, and contains none of the resins, adhesives or solvents that can stain floor covering materials. It also offers greater resistance to indentation than other underlayment products, and can be used throughout a home in both wet and dry areas regardless of the flooring material chosen. Advantages Limitations Smooth, uniform surface FIBEROCK Brand Underlayment provides an excellent substrate for various floor covering installations. Integral water resistance AQUA-TOUGH technology provides a uniform, specially engineered composition for superior water resistance, through and through. Mold Resistant In independent lab tests per ASTM D Standard Test Method for Resistance to Growth of Mold on the Surface of Interior Coatings in an Environmental Chamber, the score for FIBEROCK Brand AQUA- TOUGH Underlayment was 10 (highest score). Quality control FIBEROCK Brand Underlayment is manufactured in accordance with strict performance specifications. In-process and finished-product quality tests ensure quality and performance consistency. Dimensional stability FIBEROCK Brand Underlayment surpasses traditional plywood, oriented strand board (OSB), and lauan underlayments in retaining dimensional stability; provides reduced linear variation and edge-thickness swell. Environmentally friendly FIBEROCK Brand Underlayment offers an environmentally friendly alternative to wood-based underlayments because it is made from 95 percent recycled material. Comprehensive use FIBEROCK Brand Underlayment can be used in both wet and dry areas throughout an entire home, under vinyl, ceramic tile, carpeting, wood, or laminate flooring. Warranted performance FIBEROCK Brand Underlayment panels are warranted for 15 years against buckling, warping, delamination, cracking, and splitting upon fastening. Easy to install Simply score and snap product with minimal effort. 1. Do not use in areas subject to prolonged exposure to standing water for instance, in gang showers, saunas, or hot-tub decks. 2. Do not install FIBEROCK Brand Underlayment directly over concrete subfloors. 3. Do not install FIBEROCK Brand Underlayment over heavily cushioned, thick-foam backed, or perimeter-adhered vinyl flooring. 4. Not intended for walls or ceilings. 5. Do not install using drywall screws or drywall nails. 6. For ceramic tile applications, underlayment must be bonded using mortar or adhesive, and mechanically fastened to the subfloor. WARNING: Store all FIBEROCK panels flat. Panels are heavy and can fall over, causing serious injury or death. Do not move unless authorized.

2 Product Data Dimensions Size (thickness x width x length) Units (pcs.) Weight lbs/ft 2 1/4 x4 x /4 x3 x /8 x4 x /8 x4 x /8 x3 x Compliance with Standards Because FIBEROCK Brand Underlayment is made from 95 percent recycled material, United States Gypsum Company earned the Green Cross certificate from Scientific Certification Systems (a leading national testing company that evaluates manufacturers environmental claims). Residential and light commercial performance rating based on Robinson Floor Test (ASTM C627) conducted by TCA. For specific TCA test reports, contact your local USG Sales Representative. Earned Installer Friendly Seal Award by International Certified Floorcovering Installer s Association. Underlayment Edge-Thickness Swelling by the Disk Method According to ASTM D1037 Comparison Underlayment Thickness Increase 24 Hr. Moisture Absorption Testing 1/4 FIBEROCK Brand Underlayment 0.3% 30% 5.2 mm mahogany lauan 6% 50% 1/4 oriented strand board (OSB) 33% 50% 1/4 plywood 7% 59% Linear Variation with Change in Moisture Content According to ASTM D1037 Underlayment Overall Length Change Overall Free Moisture Increase 1/4 FIBEROCK Brand Underlayment 0.02% 0.5% 5.2 mm mahogany lauan 0.08% 11% 1/4 oriented strand board (OSB) 0.17% 10% 1/4 plywood 0.11% 11% Storage and Handling Limited Warranty All materials shall be delivered in their original unopened packages and stored in an enclosed shelter providing protection from damage and exposure to the elements. Damaged or deteriorated materials shall be removed from the premises. Allow FIBEROCK Brand Underlayment to acclimate to the temperature and humidity conditions at the job site prior to installation. For a copy of the limited warranty terms and limitations, and for customer assistance, contact USG at USG-4-YOU. 2

3 Good Design 1 System Performance Systems covered herein have been tested and evaluated for use as described. For other system applications, Practices consult your local representative. All details, specifications, and data contained in this literature are intended as a general guide for using FIBEROCK Brand Underlayment. These products must not be used in a design or construction of any given structure without complete and detailed evaluation by a qualified structural engineer or architect to verify suitability of a particular product for use in the structure. Information in this publication should be used only for FIBEROCK Brand Underlayment, as physical properties of competitive products may vary. United States Gypsum Company assumes no liability for failure resulting from the use of alternative materials or improper application or installation of FIBEROCK Brand Underlayment as specified herein. Specifications 2 Floor Design Subfloor systems should be designed for a deflection limit of L/360 for the span. The design live loads and superimposed dead loads should be included in the deflection calculation. 3 Expansion Control joints are essential for the performance of most floor-covering installations. Underlayment panels must and Contraction be separated at all building control joints. Because of the limitless conditions and structural systems on which the floor covering can be installed, the architect or engineer of record shall show locations and details of control joints on project drawings. 4 Water Barrier FIBEROCK Brand Underlayment is vapor permeable and is resistant to deterioration in the presence of water. If water-proof construction is specified, a separate water-proof membrane or system must be applied over the FIBEROCK Brand Underlayment. Consult manufacturer s guidelines for application of water-proofing materials and installation of floor coverings over these materials. Part 1: 1.1 Specify to meet project requirements. General Scope 1.2 All materials, unless otherwise indicated, shall be manufactured by United States Gypsum Company and shall Qualifications be installed in accordance with its current printed directions. 1.3 All materials shall be delivered in their original unopened packages and stored in an enclosed shelter providing Delivery and Storage protection from damage and exposure to the elements. Damaged or deteriorated materials shall be removed of Materials from the premises. WARNING: Store all FIBEROCK Brand Underlayment panels flat. Panels are heavy and can fall over, causing serious injury or death. Do not move unless authorized. 1.4 In cold weather and during FIBEROCK Brand Underlayment and tile installation, temperatures within the building Environmental Conditions shall be maintained within the range of 40 to 100 F. Adequate ventilation shall be provided to carry off excess moisture. Allow underlayment panels to acclimate to the temperature and humidity conditions at the job site prior to installation. 1.5 FIBEROCK Brand Underlayment should be cut to size with utility knife and straight edge. A handsaw or low rpm Installation Practices power saw can be used. A NIOSH/MSHA-approved respirator should be worn if a low rpm saw is used. Contractors installing tile and tile-setting materials should always follow current ANSI specifications and TCA guidelines. 3

4 Part 2: 2.1 A. Underlayment Products Materials FIBEROCK Brand Underlayment, 1/4 x4 x4, 1/4 x3 x5, 3/8 x4 x4, 3/8 x4 x8, or 3/8 x3 x5. B. Joint Reinforcement DUROCK Brand Interior Tape (alkali-resistant), 2 x 50, or 2 x 250. C. Fasteners Corrosive-resistant wood screws: 1-1/4, 1-5/8, 2-1/4. Nails: 1-1/2 hot-dipped galvanized ring shank underlayment nails, 1-1/2 hot-dipped galvanized roofing nails. Staples: 1/4 crown (or larger) chisel-point staples. Choose a fastener length that is approximately equal to the combined thickness of the underlayment and subfloor. D. Subfloor The subfloor system should be designed for a deflection limit of L/360 for the span. The subfloor should be APA Span-Rated Plywood or OSB with an Exposure 1 classification or better with T&G or back blocked at the unsupported edges. Application Joist Spacing Minimum Subfloor Thickness Resilient Flooring 16, 19.2, and 24 o.c. 23/32 Ceramic Tile 16 o.c. 19/ o.c. 23/32 24 o.c. 23/32 E. Adhesives/Mortars Ceramic tile applications: Meeting ANSI A136.1: Type I ceramic tile adhesive. Meeting ANSI A118.1: dry-set mortar. Meeting ANSI A118.4: latex portland cement mortar. Resilient floor applications: Follow floor-covering manufacturer s installation recommendations. F. Grout Meeting ANSI A G. Tile Tile shall meet ANSI A H. Water-proof Membrane Follow membrane manufacturer s installation recommendations. I. Resilient Floor Covering Part 3: 3.1 A. Preparation Allow underlayment panels to acclimate to the temperature and humidity conditions Execution General at the job site prior to installation. Consult local building codes for specific crawl-space requirements. Install FIBEROCK Brand Underlayment only over approved wood subfloor that has been installed per manufacturer s installation instructions. B. Subfloor Clean subfloor and leave free of dust, dirt, and debris. Ensure subfloor is completely dry. Verify that fasteners are flush with, or slightly below, the subfloor surface. Ensure that the subfloor and structure are within the tolerances specified by the floor-covering manufacturer s guidelines. Inspect subfloor for an even, flat surface before installing underlayment. Uneven end edge joints and variations in panel thickness may telegraph through the underlayment. Sand uneven joints, if necessary. Ensure subfloor is flat between framing elements. If subfloor panels appear to buckle, correct the problem by adding blocking or cleats under the floor. Fasten cleats to the subfloor to flatten the panels. Repair existing voids, large gaps, and penetrations through the subfloor using a manufacturer-approved floorleveler prior to installing FIBEROCK Brand Underlayment. 4

5 C. Cutting and laying out panels Maintain temperature and humidity of space prior to, during, and after installation. Conditions should approximate those of normal occupancy. Install underlayment, fastener marks up. Cut underlayment from one side using the score-and-snap method. For more difficult cuts, combine the score-and-snap method with use of a handsaw or low-rpm power saw. Cut out holes for plumbing using a holesaw, keyhole saw, or variable-speed jigsaw. Lay cut edges against the wall; only factory edges should be joined. Begin laying panels at one corner. Maintain a 1/8 space between the underlayment panels and the perimeter walls. Stagger joints of underlayment panels a minimum of 16 o.c. so that four panel corners never meet, and offset end and edge joints of panels a minimum of 8 from the subfloor panel joints. Butt underlayment panel edges and ends lightly together. A maximum 1/32 gap is allowed. D. Prior to installation of the final floor covering, avoid heavy traffic and moving heavy items across the underlayment panels. If necessary, items such as refrigerators or other appliances with free rolling wheels (or on wheeled dollies) may be rolled over the floor if care is taken to avoid wheel contact on the finished underlayment surface. Using hard wood strips or scrap underlayment strips to bear the wheel traffic is recommended. 3.2 A. Fastening FIBEROCK Brand Underlayment Lay panels flat and hold in tight contact with the subfloor while Resilient Floor fastening. When using pneumatic tools, apply pressure on gun to hold panels tightly to subfloor before shooting Application in the fastener. Do not hold trigger and bounce the tool. Care should be taken to properly set pneumatic tool pressure in order to drive fasteners flush or slightly below the surface of the underlayment. Do not countersink fastener heads more than 1/16 below the surface of the underlayment. Fasten panels to subfloor with 1/4 crown or larger chisel-point staples, corrosive-resistant wood screws, or galvanized roofing or ring shank underlayment nails spaced 1/2 from panel edges and 2 o.c. around the perimeter, and 4 o.c. in the field of the panel. Resin-, rosin-, and cement-coated fasteners, drywall screws, and drywall nails are not recommended for fastening FIBEROCK Brand Underlayment. Fastener length should be approximately equal to the combined thickness of the underlayment and subfloor. Do not allow fasteners to penetrate through subfloor. To prevent fastener heads from telegraphing through resilient floor covering, ensure that the subfloor is dry. Fasten one panel at a time. Begin at one end and fan out across the panel. B. Installing FIBEROCK Brand Underlayment over existing vinyl floor coverings Install FIBEROCK Brand Underlayment over existing flooring only if the flooring is not a heavily cushioned, thick-foam backed vinyl or perimeter fastened vinyl. Prior to installing the underlayment panels, ensure existing floor is level and meets appropriate design requirements. Repair damaged areas of floor coverings (that is, missing or broken tiles, curling floor covering at seams, severe gouges, protrusions of floor-covering surfaces, etc.). Use a high-quality floor-leveler to fill the damaged areas. Ensure that existing flooring is fully adhered and well bonded. Follow floor-covering manufacturer s recommendations for installations over existing floors. C. Finishing FIBEROCK Brand Underlayment joints Lightly sand uneven panel joints until they are smooth and even. Fill all panel end and edge joints, depressions, damaged spots, and sanded areas with a patching compound. Use a high-quality patching compound approved by the resilient flooring manufacturer and specifically designed for flooring applications. Follow patching compound manufacturer s application instructions. Scrape or sand the patched areas so that they are smooth and even. Remove dust, dirt, and debris from the underlayment surface prior to applying floor-covering adhesive. D. Floor-covering application Refer to floor-covering manufacturer s recommendations for proper application procedures. For proper trowel selection, refer to adhesive manufacturer s recommendation for porous substrates. Follow floor-covering and/or adhesive manufacturer s guidelines to allow adequate curing or setting time prior to allowing traffic on the finished floor. Follow floor-covering manufacturer s recommendations for preventive maintenance, cautions, and procedures. E. Perimeter-Bonded, Felt-Backed Resilient Floor Covering Joint patching is not required when installing this type of floor covering in new construction. When laying out underlayment panels, lightly butt ends together and sand all joints until they are smooth. Remove dust, dirt, and debris from the underlayment surface prior to application of floor covering. 5

6 3.3 A. Fastening FIBEROCK Brand Underlayment Laminate underlayment panels to subfloor using Type 1 organic Ceramic Tile Floor adhesive, latex-portland cement mortar, or dry-set mortar (for subfloor requirements, see Section 2.1, Materials). Applications Use 1/4 square-notched trowel for mortar, 5/32 V-notched trowel for Type I adhesive. Position underlayment with joints staggered from subfloor joints. Fit ends and edges closely, but do not force together. Fasten panels to subfloor with corrosive-resistant wood screws, hot-dipped galvanized ring shank underlayment, or roofing nails, spaced 8 o.c. in both directions with perimeter fasteners 1/2 from ends and edges; or with 1/4 minimum crown staples spaced 4 o.c in the field and 2 o.c around the perimeter. B. Finishing FIBEROCK Brand Underlayment Joints Sand uneven panel joints. Prefill all underlayment joints with tile-setting mortar or adhesive, and then immediately embed DUROCK Brand Interior Tape over the joints, and strike joints flush. Additional fill coats may be required. C. Floor covering application Install ceramic tile units using Type 1 organic adhesive or latex portland cement mortar. Install ceramic tile units in accordance with ANSI A108.4 and A Grout ceramic tile units using polymer modified cement grout. Install grout in accordance with ANSI A A. Base Install minimum 3/4 exterior grade plywood or OSB base across cabinet supports. Position ends Ceramic Tile and edges over supports and secure with suitable screws or nails spaced 12 o.c. max. Countertop Application B. Underlayment Position underlayment with joints staggered from base joints. Fit ends and edges closely but do not force together. Fasten panels with corrosive-resistant wood screws, hot-dipped galvanized ring shank underlayment, or roofing nails, spaced 8 o.c. in both directions with perimeter fasteners 1/2 from ends and edges; or with 1/4 minimum crown staples spaced 4 o.c. in the field and 2 o.c. around the perimeter. It is optional to laminate FIBEROCK Brand Underlayment to the base using fasteners and mortar. Use only latex-portland cement mortar or dry-set mortar mixed with acrylic latex additive applied with a 1/4 square-notched trowel. 3.5 A. Mechanically fastened wood flooring When mechanically fastening wood flooring, fasteners must be long Wood Flooring enough to penetrate through the FIBEROCK Brand Underlayment and into the subfloor. The length of the fasteners Application should be determined by adding the thickness of the underlayment to the length of the fastener recommended by flooring manufacturer. Follow recommendations in Section 3.2, Resilient Floor Applications, for underlayment installation. B. Glue-down installation of engineered or solid hardwood flooring must be done in strict accordance with the manufacturer s installation instructions. Follow recommendations in Section 3.2, Resilient Floor Applications, for underlayment installation. Submittal Approvals: Job Name Contractor Date Manufactured by United States Gypsum Company 125 South Franklin Street Chicago, IL Trademarks The following trademarks used herein are owned by United States Gypsum Company: AQUA- TOUGH,DUROCK,FIBEROCK. Note Products described here may not be available in all geographic markets. Consult your U.S. Gypsum Company sales office or representative for information. 800 USG.4YOU ( ) Notice We shall not be liable for incidental and consequential damages, directly or indirectly sustained, nor for any loss caused by application of these goods not in accordance with current printed instructions or for other than the intended use. Our liability is expressly limited to replacement of defective goods. Any claim shall be deemed waived unless made in writing to us within thirty (30) days from date it was or reasonably should have been discovered. SAFETY FIRST! Follow good safety practices. Read material safety data sheets and related literature on products before specification and/or installation. F103/rev , United States Gypsum Company Printed in U.S.A.