There is no need to dig up the floor and no need
to mix concrete. Simply tape the heating
element to the subfloor and lay your tiles...
it's as simple as that.
* Undertile Heating cannot always be used as a
primary heat source.
** You do not need specialist skills to lay the
heating element but you should use an electrician
for the wiring.
Heating- UNDERTILE HEATER
To ensure the Undertile Heating system
is suitable for your floor please read the following
Undertile Heating is suitable for use
under any ceramic or natural stone floor tiles
heating will also work under thicker floor finishes
such as flagstones, however this type of flooring
will take longer to heat up.
Undertile Heating MUST NOT be fitted
Wood (incl. Laminate)
to regular floor finishes, a cement-based smoothing
underlayment can be used to cover or protect
the heater as part of pre-tiling work (e.g.
when laying flagstones). The floor must be tiled
using a cement based tile adhesive and grout
containing their matching flexible additive,
strictly in accordance with their manufacturers'
Heating - Subfloor Preparation
The underfloor heating may be fitted on either
a suspended (timber) or a solid (concrete) subfloor.
The subfloor must be smooth, clean and free
from old adhesive residues or bitumen.
If damp-proofing or tanking systems are being
used, it is advisable to contact the manufacturer
of the system for advice. Normally, it will
be necessary to apply at least 5mm of smoothing
underlayment on top of the finished tanking.
Heating - Suspended Floors
When fitting to a timber subfloor, the floorboards
or chipboard must be over-boarded with a suitable
Warmup Insulation Board or 18 mm WBP plywood.
Existing floorboards must be fixed securely
and, if necessary, pre-levelled with a latex/cement
smoothing underlayment to give a flush fit for
the WBP plywood or the Warmup Insulation Board.
Ply must be screwed at 200m centres and installed
as per BS 5385: Part 3 Clause 14.4 .
Warmup Insulation Board must be fixed with flexible
tile adhesive. For best performance the board
should also be secured with five screws and
penny washers per board.
Fixing ply directly to the joists may not provide
a sufficiently stable floor finish to accept
tiles; fitting tongue and grove flooring and
then over-boarding with ply or Warmup Insulation
Board is recommended.
Chipboard, MDF and OSB boards are not appropriate
bases for tiling.
Floors - Concrete
tiling on a concrete floor, Warmup recommends
the use of Warmup Insulation Board to improve
the performance and efficiency of the system.
Warmup Insulation Board is fixed directly to
the subfloor with tile adhesive. The heater
is then fitted directly on top of the board
before being tiled over.
Un-insulated concrete or screed subfloors may
also be fitted with the Warmup System, however
they will be less responsive and take significantly
longer to heat up (sometimes in excess of 8 hours).
Extended heat up times will lead to higher running