Tile Backer Board

GoBoard® LT is the latest ultra-light, waterproof and durable tile backer board from Johns Manville. It’s engineered for durability, yet is up to 85% lighter than cement boards. GoBoard LT is easier to handle and can be cut right where it’s installed with a basic utility knife without crumbling or disintegrating. And, best of all, it has waterproofing already built‐in, reducing installation time and eliminating extra steps since only board joints and fastener locations need to be sealed.

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GoBoard® LT is the durable, ultra-lightweight, waterproof tile backer board from Johns Manville.

GoBoard® LT is the durable, ultra-lightweight, waterproof tile backer board from Johns Manville.

FAST INSTALLATON: Complete shower tile projects in half the time or less. Install GoBoard LT with GoBoard Sealant, take a break and tile the same day. Grout the next day and the project is done*.

ULTRA-LIGHTWEIGHT: Engineered to be dependable even though it’s much lighter weight than cement and other heavy boards. GoBoard LT can be installed in residential and light commercial tile applications.

EASY TO CUT: GoBoard LT can be quickly cut right where it’s installed with a basic utility knife without crumbling or disintegrating. It’s also much easier to handle than cement and other heavy boards.

WATERPROOF BUILT-IN: GoBoard LT saves time and money because you seal only the board joints and fastener locations for a waterproof tile assembly**.

GoBoard LT is available in the following thicknesses:

- ¼” for floors and countertops (3’x5’ and 4’x8’ sheets)
- ½" for walls, showers, and ceilings (3’x5’ and 4’x8’ sheets)

* A typical shower project, waterproof installation, following manufacturer's installation.
** Board joints and fastener locations require a waterproof sealant per GoBoard LT installation instructions.

GoBoard LT Image 490 Web
Property Method GoBoard LT (1/4'') GoBoard LT (1/2'')
Dimensions (feet) ASTM C473 3'x5, 4'x8' 3'x5, 4'x8'
Thickness (inches) ASTM C473 0.25 0.50
Board Weight (lbs/ft²)    0.35 0.40
R-Value (°F · ft² · h/BTU)  ASTM C518 1.2 2.3
Compressive Strength (avg. psi)  ASTM D2394 250 100
Moisture Movement (%)  ASTM D1037 <0.07 <0.07
Surface Burning Characteristics* ASTM E84 Pass Pass
Waterproof  ASTM D4068 Pass Pass
WVT Permeance (perms)  ASTM E96 <1 <1
Resistance to Fungi / Bacteria  ASTM G21/G22 No Growth No Growth
Freeze Thaw  ASTM C666 >25 >25
Robinson Floor Test ASTM C627 Light Commercial Not Rated for Floors

DATA SHEET/INSTALLATION INSTRUCTIONS
GoBoard LT Installation Instructions / Technical Data - English

GoBoard LT Installation Instructions / Technical Data - French

Goboard sealant
GoBoard Sealant Sheet
Alternative Sealants

goboard fasteners
GoBoard Fasteners Sheet

Available Documents