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GoBoard Waterproofing Membrane, 108 Sq. Ft. Roll
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At a Glance
Quick Decision Guide
Coverage
108 sq. ft.
Roll Size
3 ft. 3 in. × 33 ft.
Material
Polyethylene Membrane with Fabric Facing
Thin-Set Compatibility
Modified & Unmodified Mortars
Waterproofing Standard
ANSI A118.10
Steam Room Rated
ASTM E96 Method E
Installation Areas
Interior & Exterior
Country of Origin
USA
Why Choose This Product
Key Benefits
Waterproof and Crack Isolation
Combines moisture protection and crack isolation beneath tile and stone.
Steam Room Rated
Supports residential and commercial steam-room applications.
Flexible Thin-Set Bonding
Works with modified and unmodified thin-set mortars.
Interior and Exterior Use
Covers approved residential, commercial, indoor, and outdoor applications.
Same-Day Tile Installation
Keeps projects moving after the membrane is properly installed.
108 Sq. Ft. Coverage
Covers larger areas with each 39.4" × 32.8' roll.
Product Information
Product Details
Specifications
Brand
GoBoard®
Part Number
70008437
UPC
031979220564
Product Type
Waterproofing Membrane
Material
Polyethylene Membrane with Non-Woven Fabric Facing
Coverage
108 sq. ft.
Roll Size
3 ft. 3 in. × 33 ft.
Thin-Set Compatibility
Modified & Unmodified Thin-Set Mortars
Tile Compatibility
Ceramic, Porcelain & Natural Stone
Application Areas
Showers, Steam Rooms, Bathrooms, Kitchens & Other Wet Areas
Installation Environment
Interior & Exterior
GoBoard System Compatible
Yes
Waterproofing Standard
ANSI A118.10
Steam Room Standard
ASTM E96 Method E
Floor Performance Standard
ASTM C627 Extra Heavy
Country of Origin
USA
About This Product
GoBoard Shower Waterproofing Membrane for Wet Areas
GoBoard Waterproofing Membrane is a flexible, lightweight sheet that provides waterproofing and crack isolation beneath ceramic, porcelain, and natural stone tile. It is designed for approved interior and exterior applications, including showers, bathrooms, kitchens, laundry rooms, balconies, patios, and steam rooms.
Flexible Sheet for Thin-Set Bonding
A 100-micron polyethylene core creates the waterproof layer, while polypropylene nonwoven fabric on both sides bonds with modified or unmodified thin-set mortar. The membrane integrates with GoBoard panels, banding, corners, curb covers, and other GoBoard components. Tile can be installed the same day after proper application.
Tested Performance with 108 Sq. Ft. Coverage
The membrane exceeds ANSI A118.10 waterproofing requirements, is rated for residential and commercial steam rooms under ASTM E96 Method E, and achieves an ASTM C627 Extra Heavy system rating. Each 39.4" × 32.8' roll covers approximately 108 sq. ft.
Common Questions
Frequently Asked Questions
What is GoBoard Membrane used for?
GoBoard Membrane creates a waterproof and crack-isolation layer beneath ceramic, porcelain, and natural stone tile. It is suitable for approved residential and commercial applications and integrates with GoBoard panels, banding, corners, curb covers, and related components.
Where can GoBoard Membrane be installed?
It can be used in approved interior and exterior areas, including bathrooms, tubs, showers, laundry rooms, kitchens, backsplashes, balconies, patios, and other wet areas. It is also rated for residential and commercial steam rooms under ASTM E96 Method E.
What performance standards does the membrane meet?
The membrane exceeds ANSI A118.10 waterproofing requirements and achieves an ASTM C627 Extra Heavy system performance rating. It has a 100-micron polyethylene waterproofing layer laminated to polypropylene nonwoven fabric on both sides.
Which thin-set mortars are compatible?
Both modified and unmodified thin-set mortars are compatible with the polypropylene fabric facing. Embed the membrane into uniformly applied mortar with full coverage and no voids or air pockets, following the current manufacturer instructions.
How much overlap is required at membrane joints?
Membrane sections must overlap adjoining membrane, GoBoard Banding, GoBoard panels, GoBoard Pro panels, corners, and curb covers by at least 2". Proper overlap and full mortar coverage are required to create waterproof joints.
Can tile installation and flood testing occur the same day?
Tile can be installed the same day after the membrane is properly embedded. Same-day flood testing requires GoBoard Sealant or GoBoard Pro Sealant applied according to the specified procedure. Otherwise, follow the thin-set manufacturer's curing requirements.
What are the roll dimensions and coverage?
Each roll measures 39.4" wide by 32.8' long and covers approximately 108 sq. ft. Actual project coverage may be lower after accounting for required overlaps, cuts, corners, transitions, and material waste.
Where should GoBoard Membrane not be used?
GoBoard Membrane is not intended for continuously submerged applications, expansion joints, or cracks with vertical movement. Use it only with approved substrates and compatible materials while following current manufacturer instructions for project-specific limitations.