A linear drain allows for the use of larger format floor tile and the ability to pitch the floor in one direction. This offers an advantage from the traditional center drain installation, where the floor must slope in four directions in order to properly drain the water.

Common Methods Using a Clamp Down Floor Drain 

PVC Membrane/Vinyl Liner (Polyvinyl Chloride)

A plastic sheet available at most plumbing suppliers and sold in rolls of 4’, 5’ and 6’. The membrane is layered between mortar beds and the corners are folded to create the shower pan liner. If the shower pan area is larger than the roll dimension, it must be seamed or joined together. Tile cannot bond directly to this type of waterproofing.

CPE Membrane (Chlorinated Polyethylene)

A rubber sheet available at most plumbing suppliers and sold in rolls 4’, 5’ and 6’. The membrane is layered between mortar beds and corners are folded to create the shower pan liner. If the shower pan area is larger than the roll dimension, it must be seamed or joined together. Tile cannot bond directly to waterproofing. 

Hot Mop (Tar)

Heated liquid tar is applied or ”mopped” on the shower area to create the shower pan and is similar to waterproofing a roof with tar. This installation is most common in California. Similar to fiberglass waterproofing.

Common Methods Using a Bonded Flange

Liquid or Roll ON Membrane 

Roll or paint-on liquid membrane that can be applied on floors, walls, and ceilings and bonds directly to the drain flange. The total install time is shorter than traditional waterproofing methods and typically saves 2 to 3 days.  Tile can bond directly to waterproofing.

Fabric Sheet

Sheet membrane that bonds directly to the drain flange with an adhesive and is sold in most tile suppliers. Corners (in and out) are available to avoid folding. If the shower pan area is larger than the roll dimensions, it must be seamed or joined together. Tile can bond directly to waterproofing.