Prodeso Membrane Roll 54 Sq. Ft. (3′ 3.4″ x 16′ 4.9″)

Waterproofing for the room is in the layer above the floor heating system. The layers for waterproofing this type of floor are:

• subfloor
• thinset
• uncoupling membrane
• tempzone heating cable
• waterproofing tape for seams and corners
• thinset or self leveling cement
• tile floor

Insulating underlayments and uncoupling membranes share some key characteristics like providing crack isolation benefits, but they are separated by their primary functions.

Insulating underlayments, like WarmlyYours ThermalSheet, provide a thermal break between a subfloor and the heating elements, which can help prevent the concrete from acting as a “heat sink” and increase energy efficiency. ThermalSheet has a 1.5 R-value, and it offers crack isolation of up to ¼”. This can be particularly beneficial if you are trying to heat a room above a cement slab or above an unheated garage. 

Uncoupling membranes, like the Prodeso membrane, are great for protecting relatively fragile floor coverings like tile from foundational movement. They also allow for faster installation times than many other types of floor heating.

The height of the membrane itself is just about 1/4" (7/32").

This membrane provides many benefits including speedy installation, uncoupling, crack isolation, vapor management, and load distribution.

A decoupling membrane protects the installation from differential expansion/contraction between the substrate and the flooring, relieving almost all shear stresses. Crack isolation protects the installation by isolating the flooring from minor in-plane substrate cracking.