Installation Guide

Anhydrite
underlayment
Unmodified
thin-set mortar
(ANSI A118.1)
Unmodified Thin-Set
Mortar ( ANSI A118.1)
Prodeso Heat
Membrane
Prodeso Heat
Cable
Ceramic tiles
or natural stone
10 PROGRESS PROFILES - PRODESO HEAT SYSTEM
Gypsum based underlayment
Gypsum based underlayment or more properly anhydrite based substrate present many
advantages, but also a few challenges to the tile installer. CaSO4 calcium sulfate is the
component of anhydrite based underlayment and when in contact with water could
lead to the formation of ettringite (hydrate calcium aluminium sulfate), which could cause
an increase in volume. Anhydrite based underlayment need to be waterproofed if any
exposure to water or moisture throughout the life of the installation is possible. Please
follow underlayment manufacture direction for proper preparation and primer application
before fixing PRODESO HEAT MEMBRANE to the anhydrite based underlayment.
Anhydrite based underlayment need to be applied to a structural subfloor (Cement
based subfloor or wood based subfloor. For subfloor preperation see page 9-10).
PRODESO HEAT SYSTEM installed over
Gypsum based underlayment
The unique and patented design of PRODESO HEAT MEMBRANE allows for uncoupling and crack
isolation to take place in the tile assembly while embedding the heating cable for radiant floor heating.
PRODESO HEAT MEMBRANE compensates for the longitudinal movement between the subfloor and
the tile preventing cracking and delamination even on Gypsum based subfloor.
PRODESO HEAT MEMBRANE unique and patented design allows for air pockets to be formed
between the subfloor and the membrane itself. Excess moisture from the substrate will find its way to
these pockets and create a vapor cycle. This vapor cycle will balance the vapor content of the substrate
protecting the tile surface and the substrate from undesired damages.
Gypsum based subfloor are particularly sensitive to variation in humidity in their environment. It is
particularly important to prevent reintroducing moisture into a gypsum based substrate. PRODESO
HEAT MEMBRANE waterproof properties prevents water and other substances from reaching the
anhydrite based underlayment and the possible damages to the tile floor.
PRODESO HEAT MEMBRANE unique designs allows to evenly distribute load from the floor to the
subfloor. Each rounded square relief has a central cavity shaped like an inverted pyramid. When filled with
thin set this inverted pyramid become an incompressible structure that like pillars will evenly distribute and
transfer the load from the tile floor to the subfloor.
UNCOUPLING
WATERPROOFING
VAPOR MANAGEMENT
LOAD DISTRIBUTION
PRODESO HEAT SYSTEM is the ideal solution to install ceramic
and natural stone tiles on anhydrite based underlayment.
PRODESO HEAT MEMBRANE uncoupling membrane is laid
directly over the entire surface intended for tile installation, the
heating cable is then installed in the areas where heat is desired
using the channels formed between the rounded square reliefs.
It’s NOT necessary to use self-leveling cement based to cover/
protect the wire before starting tile installation. This results
in saving material/weight/time/cost. Tile installation can start
immediately after installing the heated cable.
GYPSUM BASED
UNDERLAYMENT
PRODESO HEAT SYSTEM properties below provide a solution for these challenges.