TECHNICAL GUIDETILE BACKER
DensShield Tile BackerProduct OverviewTable of ContentsProduct Overview. . . . . . . . . . . . . . . .2Physical Properties. . . . . . . . . . . . . . .3Fastener Guide. . . . . . . . . . . . . . . . . .3Testing and Code Recognition. . . . . .4Sustainability and Guidelines . . . . . .5Tub/Shower Wallsor Ceilings . . . . . . . . . . . . . . . . . . . . .6Residential and LightCommercial Floors . . . . . . . . . . . . . . .9Countertops . . . . . . . . . . . . . . . . . . .10Showers . . . . . . . . . . . . . . . . . . . . . .10Dry Non-Tile Walls or Ceilings . . . .11High-HumidityNon-Tile Areas. . . . . . . . . . . . . . . . .11Wet Non-Tile Areas. . . . . . . . . . . . .11Residential Steam Rooms . . . . . . . .12Interior WaterproofingSystem Examples. . . . . . . . . . . . . . .13Fire-Rated Assemblies. . . . . . . . . . .14DensShield Tile Backer is designed for use as a tile substrate for walls, ceilings, floors andcountertops. The unique features of DensShield Tile Backer include: Treated, water-resistant core. Fiberglass mats on front and back for strength and moisture and mold resistance. Grey surface coating that helps protect the tile installation and wall cavity from moistureintrusion and damage.DensShield Tile Backer is an ideal tile backer board for high moisture areas because it has abuilt-in moisture barrier that stops moisture at the surface. This special coating helps protectthe tile installation and wall cavity from moisture intrusion. The built-in moisture barrier alsoremoves an extra installation step of adding an additional, separate membrane behind othertile backers. In comparison, cement and fiber cement tile backer products require a separatemembrane when used in wet areas according to the Handbook for Ceramic Tile from the TileCouncil of North America (TCNA).DensShield Tile Backer is significantly lighter than competing fiber cement and cement products(based on a comparison of 1/2” products). DensShield panels are easily cut with a standard utilityknife and are faster to install than cement board, according to studies by NAHB and Intertek.DensShield panels are mold resistant, and have scored a 10, the highest level of performance formold resistance under the ASTM D3273 test method, a testing standard set by ASTM International.In addition, the mold resistance of DensShield Tile Backer has been validated by UL Environmentand listed in its Sustainable Product Guide utilizing microbial resistant testing based on ASTMStandard D6329-98. For additional information concerning these tests or the mold-resistance ofDensShield Tile Backer, see page 4 or go to www.buildgp.com/safetyinfo.Delivery, Handlingand Storage . . . . . . . . . . . . . . . . . . .152 For latest information and updates:Technical Service Hotline 1.800.225.6119 or www.gpgypsum.comCAUTION: For product fire, safety and use information,go to buildgp.com/safetyinfo.
DensShield Tile BackerPhysical PropertiesProperties1/4” (6.4 mm)DensShield Tile Backer4’ (1220 mm)Length, standard34’ (1220 mm) 1/4” (6.4 mm)EdgesWeight1 nominal, lbs./sq. ft. (Kg/m2)Bending Radius4Fire Classificationsquare1.6 (7.8)8’ (2438 mm)n/a1/2” (12.7 mm)DensShield Tile Backer4’ (1220 mm),32” (813 mm) 3/32” (2.4 mm)5’ (1524 mm)8’ (2438 mm) 1/4” (6.4 mm)square2.0 (9.8)12’ (3658 mm)n/aPermeance5, perms (ng/Pa s m2)R Value2, ft2 F hr/BTU(m2 K/W)StandardsCode Evaluation 1.5 (86) 1.5 (86)Width, standard3TCNA Recognition5/8” (15.9 mm)DensShield Fireguard Tile Backer4’ (1220 mm)8’ (2438 mm) 1/4” (6.4 mm)square2.5 (12.2)16’ (4877 mm)Type X (ASTM C 1178),UL and ULC certified* 1.5 (86)0.56 (0.098)0.56 (0.098)0.67 (0.118)ASTM C1178ASTM C1178ASTM C1178DensShield Tile Backer is manufactured to meet ASTM C1178 and is accepted foruse as a tile backer in tub and shower areas in accordance with current IBC and IRCcodes. DensShield Tile Backer holds an ICC-ES product approval.ASTM C627 (Robinson Floor Test); Floors – F146, F151; Radiant Floor – RH135;Walls – W221, W222, W223, W242, W243, W245, W428; Ceilings – C311, C312,C315; Tubs – B413, B419, B441; Showers – B420; Countertop – C513* Consult the UL and ULC Directories for approved use.1Represents approximate weight for design and shipping purposes. Actual weight may vary based on manufacturing location and other factors.2Tested in accordance with ASTM C518.3Specified values per ASTM C1178.4Double fasteners on ends as needed.5Tested in accordance with ASTM E96 (drycup method). Perm rating for DensShield Tile Backer only. Tile applications will have lower perm.Fastener GuideApplicationFastenerMin. Length1/2” (13 mm) / 5/8” (16 mm)SpacingWalls & Ceilings(wood frame)Walls & Ceilings(wood frame)Walls & Ceilings(steel frame)Galvanized* roofing nail1-1/2” (38 mm)1-3/4” (45 mm)1-1/4” (32 mm)1-5/8” (41 mm)1-1/4” (32 mm)6” (152 mm) off center (o.c.)along framing6” (152 mm) off center (o.c.)along framing6” (152 mm) off center (o.c.)along framing1-1/4” (32 mm)8” (203 mm) off center (o.c.)in both directions7/8” (22 mm)2” (51 mm) off center (o.c.)on edges4” (102 mm) off center (o.c.)in fieldFloorsFloors (1/4” only)(6.4 mm only)Buglehead, rust resistant*, coarsethread, sharp point screwBuglehead, fine thread, sharp pointrust resistant* drywall screwGalvanized* roofing nailorBuglehead, corrosion resistant*,coarse thread, sharp point screw1/4” (6 mm) crown, corrosiveresistant* chisel point staplesNote: For walls, fasteners should penetrate at least 3/4” (19 mm) into the wood framing.*Contact fastener manufacturer for proper selection of corrosion resistance.CAUTION: For product fire, safety and use information,go to buildgp.com/safetyinfo.For latest information and updates:Technical Service Hotline 1.800.225.6119 or www.gpgypsum.com3
DensShield Tile BackerTesting and Code RecognitionRobinson Floor Test/ASTM C627 – DensShield Tile Backer has passed the industry standard test conducted by theTile Council of North America for residential and light commercial floors. This test measures the load strength of the tilefloor assembly.Tile Adhesion Bond Testing – CTC-Geotek conducted tests comparing adhesion capabilities using various setting materials.The tests concluded that bonds with DensShield Tile Backer were as good, if not better, than bonds with cement board.Shower Test – In a test by an independent testing laboratory, DensShield Tile Backer was subjected to a shower of water at110 F (43.3 C), 12 minutes per hour, 24 hours a day, 7 days a week for six months. The installation had no grout between thetiles. No deterioration occurred to either the DensShield backer board, the framing members or the wall cavity.The DensShield Tile Backer test was designed to represent 12 years of regular shower use. Although cementitious backerboards would not likely deteriorate under the same conditions, the possibility exists for deterioration of framingmembers and the wall cavity materials due to water inﬁltration if a moisture barrier isn’t positioned behind thecementitious backer unit.Percolation Test – The percolation test helps determine if an additional moisture barrier should be installed. The test consistsof a 2” (51 mm) diameter tube, 48” (1220 mm) long, bonded to test samples with silicone sealant. The tube is filled with waterand after 48 hours, the remaining water is measured (minus evaporation).During testing 1/8” (3 mm) of water passed through DensShield Tile Backer, 19” (483 mm) of water passed through one cementitioustile substrate sample and 43” (1092 mm) of water passed through another sample of cement board. The test demonstratesDensShield Tile Backer stops water at the surface, while cement boards allow water to pass through their porousconstruction. The Tile Council of North America requires the use of a moisture barrier in wet areas for cement backer boardsbut does not require a vapor retarder for DensShield Tile Backer since DensShield panels have a built-in moisture barrier thatstops moisture at the panel surface.Water Vapor Transmission – ASTM E96 test method intends to measure the rate of water movement through a material’ssurface over a period of time, commonly called vapor permeability. This is accomplished under controlled conditions oftemperature and humidity. It is used to assess the passage of water vapor through paper, plastic films, other sheet materials,fiberboards, wood products, gypsum and plaster products. DensShield Tile Backer is very low perm, 1.5 perm and is consideredvapor semi-impermeable.Mold Resistance Test – When tested, as manufactured, in accordance with ASTM D3273, DensShield Tile Backer has scoreda 10, the highest level of performance for mold resistance under the ASTM D3273 test method.The score of 10, in the ASTM D3273 test, indicates no mold growth in a 4-week controlled laboratory test. The mold resistance ofany building product when used in actual job site conditions may not produce the same results as were achieved in the controlled,laboratory setting. No material can be considered mold proof. When properly used with good design, handling and constructionpractices, Dens Brand gypsum products provide increased mold resistance compared to standard paper-faced wallboard. For moreinformation, go to www.buildgp.com/safetyinfo.Standards and Code Compliance – DensShield Tile Backer in 1/4” (6.4 mm), 1/2” (12.7 mm) and 5/8” (15.9 mm) thicknessesconforms to current IRC and IBC codes and is manufactured to meet ASTM C1178 as a fiberglass mat gypsum substrate for useas tile backer. DensShield Tile Backer has ICC-ES product approval.DensShield Tile Backer assembly installation information is listed as coated glass mat water-resistant gypsumbacker board in the current Tile Council of North America (TCNA) Handbook for Ceramic Tile Installation.4 For latest information and updates:Technical Service Hotline 1.800.225.6119 or www.gpgypsum.comCAUTION: For product fire, safety and use information,go to buildgp.com/safetyinfo.
DensShield Tile BackerGeorgia-Pacific Gypsum and SustainabilityGeorgia-Pacific Gypsum’s definition of sustainability is meeting the needs of society today without jeopardizing our ability to doso in the future. We are committed to using resources efficiently to provide innovative products and solutions that meet the needsof customers and society, while operating in a manner that is environmentally and socially responsible, and economically sound.We continue to focus on: Improving energy efficiency at our manufacturing plants Seeking out opportunities to reduce water use, and to reuse water more efficiently Finding cost effective ways to further reduce air emissions Recovering and reusing materials that otherwise would end up in landfills.Green building codes, standards, and programs are establishing themselves across the country. They promote the use of productsthat contribute to the performance of the building, along with minimizing environmental and human health impacts over the lifeof the building or home. Because we embrace product performance and operate in an environmentally, socially, and economicallysound manner, owners and architects can feel good about the structures they build using our products.Many of our products contribute to LEED and other green building codes, standards, or program credits or requirements. Pleaserefer to www.gpgypsum.com for recycled content, regional materials, and low emitting materials information and use our on-lineLEED calculator to calculate contribution for a specific credit. For general information on sustainability, visitwww.buildgp.com/sustainability.General Guidelines Georgia-Pacific Gypsum does not have testing or installation instructions for DensShield Tile Backer and tile applicationsover equivalent or effective gauge steel studs. When equivalent or effective gauge studs are used, please contact studmanufacturer for acceptability of their proprietary studs for use with tile applications. There is not a weight limit for tile applications over DensShield Tile Backer, however when installing 3/8” (9.5 mm) ceramictile over DensShield Tile Backer, the stud wall needs to be designed with the required deflection requirements. The tileadhesive manufacturer can recommend the appropriate tile adhesive based on the size of tile and location of use.CAUTION: For product fire, safety and use information,go to buildgp.com/safetyinfo.For latest information and updates:Technical Service Hotline 1.800.225.6119 or www.gpgypsum.com5
DensShield Tile BackerTub/Shower Walls or CeilingsDS001 Walls or CeilingsDensShield Tile Backer can be used as a tile substrate in residential and commercial wall applications. Attach DensShieldTile Backer with grey side facing the interior. Tiles should always be applied to grey side. Cut panel to required size and makecutouts. Fit ends and edges closely. Do not leave gaps between panels.DensShield Tile Backer may be cut by using a utility knife to score, then snap, working from the grey face side.For walls, when used as a tile substrate a minimum 20-gauge or equivalent steel or wood framing should be spaced no greaterthan 16” (406 mm) o.c. or 24” (610 mm) with blocking at all joints for 1/2” (12.7 mm) DensShield Tile Backer and 24” (610 mm)o.c.for 5/8” (15.9 mm) DensShield Fireguard Tile Backer. Board can be applied horizontally or vertically.For ceilings, framing should be spaced no greater than 12” (305 mm) o.c. for 1/2” (12.7 mm) or 16” (406 mm) o.c. for 5/8”(15.9 mm) thickness. Board should be applied perpendicular to framing.Fasteners shall be spaced 6” (152 mm) o.c. for walls and ceilings for wood and steel framing. Do not countersink. Drive fastenersflush with grey coated surface. See Fastener Guide for proper selection.Do not use DensShield panels as a base for nailing and mechanical fastening.In all corners, imbed with a bead of flexible sealant when installing panels into corner. Apply self-adhesive 2” (51 mm) widefiberglass mesh tape and bed tape on all joints and corners with material use