Is KERDI BOARD worth it over cement backer board?

It costs more per sheet, but it waterproofs and insulates in one layer and installs faster. For wet areas like showers, the labor savings often offset the price.

What thickness should I use?

This 1/2-inch panel is the common choice for walls and floors where you want waterproofing plus modest insulation. Thinner panels save height; thicker ones add R-value.

Can I tile directly on it?

Yes. Thin-set bonds to the fleece surface, and Schluter specifies its thin-set and washers for the warranty. Follow the installation guide for seams and fasteners.

How much area does one sheet cover?

One 48 by 96 inch sheet covers 32 square feet. Plan for cuts and waste, usually 10 percent extra.

The best new price was $109.00 at The Home Depot as of November 4, 2026. Compare all three stores, since sheet goods often vary with freight and pickup options.

Does it replace a vapor barrier?

The foam core is waterproof, but check your local code and Schluter's assembly details for vapor control in your wall or floor build-up.

Where is the Schluter KERDI BOARD (1/2") cheapest?

At The Home Depot, for $109.00, as of our latest check.

Where can I buy the Schluter KERDI BOARD (1/2")?

3 stores we checked sell it, including Professional Tile-Setters Store, FloorBox, The Home Depot.

Schluter KERDI BOARD (1/2")

Best price now

$109.00at The Home DepotObserved at 10:51 AM

Compared across 3 stores. Prices are checked against each store and labelled with when.

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Our take on the Schluter KERDI BOARD (1/2")

The KERDI BOARD is a 1/2-inch (9 mm) extruded polystyrene foam panel with a fleece webbing surface, sold in a 48 by 96 inch sheet. It combines waterproofing and thermal insulation in one layer, so you can set tile directly over it without a separate membrane. It contains no cement or fiberglass and is light enough for one person to carry and cut. The best new price is $109.00 at The Home Depot as of November 4, 2026, with three stores listing it new.