As with all electrical
underfloor heating systems, certain procedures
must be followed. Ensure you have read all
technical specifications and you are happy to
fit Warmup Underfloor Heating to your room.
To install your Warmup underfloor heating system
follow these five steps. Please note that
this is a summary.
STEP 1: APPLY PRIMER
1. Smooth, clean and dry the subfloor
The surface must be smooth, dry and free from
2. Paint the floor with Warmup Primer
You do not need to use primer if installing on
an insulated tile back board.
If fitting to a wooden floor, the floor must be
fitted with tile backer board or plywood.
If fitting to a solid floor the concrete must
be completely dry.
3. Allow primer to dry
The light green colour of the primer will change
to a dark green once dry. Avoid traffic once primer
1. Mark the heater position on the floor
Calculate in square meters the size of the area
to be heated.
Use the Sizing Guide (found in the back of the
Installation Manual) to correctly fit your heating
wire into the space provided.
2. Mark the start point
As close to the power supply as possible but
no further than 2.5m from it.
3. Mark perimeter and spacing intervals
Mark all outer corners of the heated areas referring
to the Sizing Guide.
Join the corners to form a marked out perimeter.
Mark the spacing intervals for the underfloor
Remember: Plan the heater layout and installation
so that any drilling after tiling will not damage
LAYOUT THE WIREWarmup under floor heating
1. Gently pull the black power supply
cable from the box
After 3 meters, you will reach the point at
which the power supply cable joins the heater
Tape to the floor at the start point and at
2. Layout the heater wire in parallel
Begin at the start point and in U shapes go
to the furthest point. Secure the ends
of each run
3. Secure the ends of each run
Using the wire spacing markings as tape down
points, secure the heating wire to the floor
with adhesive tape.
4. Find the other end
Once you have completed 75% of layout, unroll
the remaining heating wire and the second power
At the end where the power supply cable meets
the heating wire you will find another joint.
Tape this to the end point at least 50mm from
the start point.
You will be left with unsecured heater wire
– layout in reverse order, starting from
5. Tape down the entire heater
Once completed, tape down the entire length
of the heating wire, positioning the tape centrally
over the wire.
6. Fix power supply cables.
If necessary, chisel out channels for power
supply cables and the floor probe wire –
this will minimise the increased height.
Fit the power supply cables into the channels
and secure with fixing tape.
Remove all debris and chippings from the floor.
Remember: Protect the heater wire with cardboard
or hardboard between installation andtiling.
STEP 4: CONNECT
Follow the instructions supplied with your thermostat.
Your underfloor heating system will not function
without a correctly installed thermostat.
STEP 5: TILE AND GROUT
1. Check the heater wire is fully taped and
2. Tile as normal, taking care not to damage
or dislodge the heater wire.
If tiling with mosaic or similar tiles, it is
advisable to cover the heater element with latex
self-levelling compound before tiling.
When using a notched trowel, gently comb the
adhesive in straight lines in the same direction
as the runs of the heating wire.
DO NOT lift tiles once the adhesive is dry,
as this will damage the heater wire.
3. Grout the floor as soon as possible as per
the manufacturers instructions.
DO NOT switch on the heater until the tile adhesive
is fully dried (minimum 7 days).
Remember: Use ceramic tile adhesives and grouts
Check the floor heater is working directly before