
Extruded polystyrene
Pre-sloped shower pan
Rigid foam pan with a factory-formed fall to the drain
From $249each
In stock
Sample listing. Specification and pricing shown here are illustrative while the real catalogue is loaded. Ask us for a current quote on the actual material.
Waterproofing
Sheet membrane for shower walls, pans, and wet rooms
$89per roll
In stock53.8 sq ft per box
Covers about 53.8 sq ft — $89
How much you need depends on the room, and what it costs to fit depends on what is behind the wall. Build the list here and send it for a quote — we check the amounts against the room and price the materials and the work together.
A bonded sheet membrane that becomes the waterproofing plane of the assembly. Tile is not waterproof and grout is not waterproof — this layer is.
The membrane is only as good as its corners and penetrations. Banding at every internal corner and a collar at every pipe is not optional.
Goes with it
The parts of the assembly this material depends on. Ordering them together avoids the mid-project discovery that the mortar is wrong for the format.

Extruded polystyrene
Rigid foam pan with a factory-formed fall to the drain
From $249each
In stock
Stainless steel
Low-profile linear drain with a tileable insert
From $329each
In stock
Extruded polystyrene
Prefabricated niche ready for membrane and tile
From $129each
In stockSeen in
Each room says which surface this material went on there, and lists everything that went in alongside it, so you can see it in the position you are considering and order the whole assembly rather than assembling it yourself.
In use

Specification study
Full bathroom renovation with a curbless shower and heated stone-look floor
Completed September 2025

Specification study
Alcove tub converted to a walk-in shower with a bench, niche, and grab-bar blocking
Completed July 2025