Glossary Term
Bonded Membrane
Definition
A waterproofing layer that adheres directly to the substrate behind the tile. Unlike older "unbonded" systems that relied on a floating mortar bed, bonded membranes — like Schluter KERDI or liquid-applied products like RedGard — bond to the backer board and move with it, reducing the risk of cracking at transitions.
Where You'll See This Term
On contractor bids, in tile manufacturer installation guides, and in discussions about shower waterproofing systems.