Finish TradesQuestion 229 of 700
A shower receptor will use a liquid-applied waterproofing membrane over the tile backer. The MOST important installer control for a reliable waterproof layer is to:
a.Apply a single thin coat as fast as possible
b.Skip the corners since tile covers them
c.Achieve the manufacturer's required wet/dry film thickness and full continuous coverage, especially at corners and the curb
d.Use the membrane only on the floor, not the walls
Explanation
Liquid waterproofing works only when it forms a continuous film at the required thickness, with special attention (and often reinforcing fabric) at inside corners, changes of plane, and the curb where water collects. A single thin coat, skipped corners, or wall-less coverage leave gaps that leak.
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