Warmup Underfloor Heating: now everyone can benefit from the practicality and style of ceramic or stone flooring coupled with the luxury of underfloor heating in any room of the house thanks to Warmup Underfloor Heating.
Used either as primary heating or simply to keep the chill off*, Warmup Underfloor Heating is unobtrusive, inexpensive and easy to install.
Warmup’s Underfloor Heating can be installed in hours without the need for specialist tools or skills, however you should use an electrician for the wiring from the thermostat to the mains.
* Underfloor Heating cannot always be used as a primary heat source.

Alongside the new Lifetime Warranty*, Warmup also offers a Safety Net Guarantee where we will replace a heater free of charge* should it be accidentally damaged during installation.
*Terms and conditions apply.  

Technical Specifications / Flooring

To ensure the Warmup Underfloor Heating system is suitable for your floor please read the following section.

Floor Finishes:
Warmup Underfloor Heating is suitable for use under any ceramic or natural stone floor tiles including:
• Slate
• Marble
• Porcelain
• Terracotta
• Limestone
The underfloor heater will also work under thicker floor finishes such as flagstones, however this type of flooring will take longer to heat up.

Warmup Underfloor Heating MUST NOT be fitted under:
• Vinyl
• Wood (incl. laminate)
• Cork
• Carpet
In addition 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’ instructions.

All the Warmup products can be found in the Warmup brochure and on the Warmup website.  If there is any Warmup product that you are interested in that is not featured on our website, please email us with your enquiry, or call us on 01425 621173.

Subfloor Preparation
The underfloor heater must 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.

Suspended Floors – Timber

When fitting the underfloor heater to a timber subfloor, the floorboards or chipboard must be over-boarded with a suitable Warmup Insulation Board or 18mm 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 200mm 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 5 screws and penny washers per board.
WARNING:
Fixing ply directly to the joists may not provide a sufficiently stable floor finish to accept tiles; fitting tongue and groove flooring and then over-boarding with ply or Warmup Insulation Board is recommended.
Chipboard, MDF and OSB boards are not appropriate bases for tiling.

Solid Floors – Concrete

If tiling on a concrete floor, Warmup recommends the use of Warmup Insulation Board to improve the performance and efficiency of the underfloor heating system. Warmup Insulation Board is fixed directly on top of the board before being tiled over. 

Warmup Insulation Board will save you money when used in conjunction with underfloor heating by acting as a very efficient thermal barrier.  It reflects the heat upwards into the floor tile instead of allowing heat to warm up the concrete below.  After switching on your heating, your floor tiles will warm up in about 10-15 minutes. Tiles fixed to plain concrete can take 2-3 hours and more to warm through.

Un-Insulated concrete or screed subfloors
 

This type of floor may also be fitted with the Warmup Heating 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 costs.