#2 · aug 19, 2008.

Kerdi waterproof membrane installation. No, that you can only put kerdi or a waterproofing membrane over cement board in a wet. Install schluter kerdi like a boss schluter kerdi is a waterproofing membrane. How did this project turn out?

There are one or two code inspectors here who will say: A lot of folks like using cement board but. With a few exceptions, unmodified thinset mortar is required for setting ceramic and stone tile.

Schluter recommends using their kerdi unmodified thinset mortar as the adhesive. Plus, it's backed by a great warranty. Suppose i could cut a sheet out about a couple of inches wider that the floor so the membrane would go.

Further, kerdi is designed in a special way that ensures a vapor retardant feature. Without a waterproof membrane like kerdi, water and moisture can seep through grout, tile and other materials and end up damaging wood studs and subfloor. A.sean gerolimatos, technical services manager for schluter systems, responds:

Kerdi features a modified polyethylene (peva) core. Apply the base coat adhesive. Kerdi is ideal for use in tiled showers, bathtub surrounds,.