December 7, 2021

Schluter Shower Installation (Part 2 – Waterproofing Walls with KERDI) — by Home Repair Tutor

This Schluter shower installation (Part 2) shows how to waterproof the walls using KERDI membrane with Schluter’s ALL-SET mortar.

Helpful Links:
-Bathroom Repair Tutor —
-Schluter Shower Kit (48″ x 72″) —
-Schluter Shower Niche (12″ x 28″) —
-Schluter Corner Bench (16″ x 16″ x 20″) —
-KERDI Trowel —

Mix ALL-SET per the directions, this is SUPER important to get the right consistency and pot life for the mortar. We used 6-1/2 quarts of water for one bag of mortar. And mixed the mortar for 5 minutes, allowed it to slake for 10 minutes, and mixed it for another 3 minutes after slaking.

It helps to place a plumb line on the drywall to indicate where the KERDI membrane should stop. Take a damp sponge and wipe down the drywall to remove any dust and to prevent the thin-set mortar from setting up too quickly. Then use a KERDI trowel to work the mortar into the drywall surface. Directionally trowel ALL-SET on the wall to help remove air gaps and collapse all the ridges in the mortar.

Compress KERDI membrane into the walls, going from the ceiling to the floor. Remove air gaps and flatten KERDI using either the KERDI trowel or 6 inch drywall knife. Overlap all KERDI membrane by 2 inches.

Watch our video for all the Schluter shower installation tips for this step of waterproofing the walls.


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