Schluter Systems KERDI-BOARD 0.5-in x 32-in x 48-in Polystyrene Foam Backer BoardKERDI BOARD 1 2 in Foam Backer Board, 32 x 48 in Lightweight, waterproof KERDI BOARD is an extruded polystyrene foam backer board for creating flat, level, plumb substrates ready for tile. With fleece webbing on both sides, it bonds securely with thin set mortar and replaces traditional gypsum or cement backer boards in wet areas. Key Features: Waterproof and Thermally Insulating: XPS foam core with reinforced faces resists moisture and helps reduce

KERDI-BOARD 1/2-in Foam Backer Board, 32 x 48 in

Lightweight, waterproof KERDI-BOARD is an extruded polystyrene foam backer board for creating flat, level, plumb substrates ready for tile. With fleece webbing on both sides, it bonds securely with thin-set mortar and replaces traditional gypsum or cement backer boards in wet areas.

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Key Features:

• Waterproof and Thermally Insulating: XPS foam core with reinforced faces resists moisture and helps reduce thermal bridging.
• Ready-to-Tile Surface: Fleece webbing on both sides ensures strong thin-set mortar adhesion for tile installations.
• Lightweight, Rigid Construction: Even, impact-resistant panels are easy to cut with a utility knife and handle on site.
• Versatile Use: Ideal for showers, tub surrounds, countertops, vanities, shelving, and custom building elements.
• Dust-Free Installation: Contains no cement or fiberglass, minimizing mess during cutting and fitting.

Please check the Product Data Sheet Here

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Specifications Table:

Specification	Details
Panel material	Extruded polystyrene foam (XPS) with reinforcement and fleece webbing on both sides
Dimensions	0.5 in (12.5 mm) thick x 32 in x 48 in
Waterproofing	Suitable for bonded waterproofing assemblies when seams and joints are properly treated
Installation	Cut with utility knife; set and tile with thin-set mortar
Intended use	Interior applications only
Features	Lightweight, rigid, impact-resistant; thermally insulating; dust-free (no cement or fiberglass)

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Frequently Asked Questions (FAQ):

Q: Can KERDI-BOARD be used in exterior applications?
A: No. It is intended for interior applications only.

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Q: How is the board cut to size?
A: Score with a utility knife using the printed gridlines as a guide, then snap to break cleanly.

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Q: Do I need a separate waterproofing membrane?
A: When seams and fastener penetrations are properly treated, KERDI-BOARD serves as part of a bonded waterproofing assembly ready for tile.

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Q: What mortar should be used to set tile on KERDI-BOARD?
A: Use thin-set mortar appropriate for the tile and substrate per Schluter installation guidelines.

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Q: What thickness is this panel?
A: This listing is for 1/2 inch (12.5 mm) thickness, 32 in x 48 in panels.

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Sculptural Structure Meets Seamless Waterproofing

KERDI-BOARD brings a tailored precision to wet spaces, transforming walls and benches into clean, architectural planes ready for tile. I love the subtle grid—an elegant guide that makes custom forms and crisp lines effortless. Wrap a shower bench or craft a floating vanity, then cloak it in stone or porcelain for a refined, spa-like finish. It’s the quiet backbone of luxurious, high-performance bathrooms.

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Build your next shower or feature with KERDI-BOARD and enjoy a faster, cleaner, waterproof foundation ready for tile.