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Diamond Back Tile Backer
Last Modified: 2018-02-05

Diamond Back Tile Backer


  • Scores and snaps like standard gypsum board
  • Mold resistant rating of 10 (no mold) when tested per ASTM D3273
  • Up to 50% lighter weight than cement backer boards and up to 20% lighter weight than other ASTM C1178 gypsum tile backer boards
  • The proprietary moisture barrier face eliminates need for an additional moisture/vapor retarder
  • Lifetime limited warranty for residential tile installations
  • 20 year limited warranty for commercial tile installations
  • Tile can be applied directly with latexportland cement mortar
  • Consistently high quality
  • Uniform edge and field hardness.

SizeThicknessPieces Per LiftQTY
3' X 5'1/4"-Add To Quote
4' X 4'1/4"-Add To Quote
32" X 5'1/2"-Add To Quote
3' X 5'1/2"-Add To Quote
4' X 5'1/2"-Add To Quote
4' x 8'1/2"-Add To Quote
4' X 5'5/8"-Add To Quote
4' x 8'5/8"-Add To Quote

Diamond Back Tile Backer

Diamondback® Tile Backer: the superior tile substrate for walls, ceilings, and countertops. Diamondback® Tile Backer is used behind tiles in wet areas such as bathrooms, laundries, utility rooms and kitchens. Quarter-inch (6.4mm) Diamondback Tile Backer is suitable for use as an underlayment for countertops and residential and light commercial flooring applications. Diamondback Tile Backer Type X provides the same moisture resistance as Diamondback Tile Backer, plus it has a specially formulated core for use in fire resistance rated designs. These products consist of a high performance, water-resistant gypsum board produced with CertainTeed's patented, proprietary Embedded Glass Reinforced Gypsum (EGRG®) Technology.


Committed to sustainability and total transparency, CertainTeed Gypsum is the first gypsum manufacturer to issue:

  • EPDs: Comprehensive 3rd party life cycle assessments certified by UL Environment 
    • Type X and Easi-lite
  • HPDs: Open standard, in which manufacturers report what makes up our products
    • All of board products have HPDs

Our 14 gypsum board manufacturing facilities, located throughout North America, operate with a responsible and environmentally conscious ethic that includes

  • Reclamation
  • Preservation of natural resources
  • Recycling
    • Face & back paper consists of 100% recycled paper
    • In-plant scrap is recycled back into the manufacturing process
  • Waste management
  • Where sources are available, synthetic or by-product gypsum from the desulphurization of flue gases at coal-fired power plants is used.
    • 3 of our manufacturing plants (Carrollton, Kentucky; Moundsville, West Virginia and Toronto, Ontario) use 100% synthetic gypsum and the total recycled content for these synthetic gypsum plants is 96%.

Although LEED rating systems do not currently address emissions for all building materials and their effects on indoor air quality, finished CertainTeed gypsum board products have no reportable VOCs and will not affect indoor air quality.

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