Retrofit Underfloor Heating Overlay Pack

£649.95£4,056.95 Incl. VAT

Free delivery over £250 (Exceptions Apply)
Next Day Available | 30 Day Return Policy
Further Delivery Information

Product Overview

This Retrofit Underfloor Heating Overlay Pack is the ideal solution for a retrofit underfloor installation. These Kits are perfect for kitchens, bathrooms, extensions and conservatories.

This overlay underfloor heating kit can be tiled directly onto. No requirement for primer. The floor must be level and can be installed onto a concrete or wooden subfloor. Can be fixed using insulation fixing discs with screws or tile adhesive.

Mapei VS90 is our product of choice for bonding panels to the subfloor.

Retrofit Underfloor Heating Overlay Pack Content

Please select the pack size required for actual content.

  • 16mm Pipe – As Required
  • Single Loop Control Pack or Manifold and Pump Set
  • Reducers and/or 16mm Compression Couplings- As Required
  • Bend Supports- As Required
  • 1200 x 600 x 20mm Insulation Panels- As Required
  • Scrim Tape – As Required

Insulation Specification

  • Total overall dimensions – 1200mm x 600 mm x 20mm
  • Pipe Diameter – 16mm
  • Thermal conductivity – 0.033 W/mk
  • Pipe centres – 150mm
  • Material – Cement Reinforced Surface XPS
  • Water Absorption – 0.6%
  • Compression Strength – 400 Kpa
  • Temperature Range – -50 deg to 75 deg Centigrade
  • Fire performance – BS 476 / EN13501-1 Class 0 / Euroclass E
  • Sound Reduction – BS EN ISO 10140-3 19dB ( 6mm )
  • Weight – 2.48 kg

Please Note: 

The image is an illustration only, we may supply kits with either a Wilo or Grundfos pump. if you have a preference please leave a note and we will do our best to accommodate. Our manifolds are high-quality Manufactured Stainless Steel. 

 If your desired floor finish is laminate, vinyl, carpet, or wood, then a minimum of 3mm self-leveller/latex will be required over the panels.

Frequently Asked Questions

Q. What is overlay underfloor heating?

A. Simple put is a system that can be used over an existing concrete subfloor or floorboards.

Q. How do you install an underfloor heating overlay?

A. Manufacturer installation requirements should be followed. Depending on the subfloor type, specific preparations will be required. It is also essential that the floor is levelled before installing these systems.

Q. Can you retrofit underfloor heating?

A. Yes there are a number of systems available each with different benefits and build ups.

Q. What can you put on top of underfloor heating?

A. Almost any floor finish. This system is designed for tiles. Do a little homework and check with the supplier that their products are compatible with the underfloor.

If you have any questions please contact our support them on 01684 540554 or email us via

Retrofit Underfloor Heating Overlay Pack

Delivery Information

We have multiple delivery options

  • Next Day Carrier
  • Delivery From Branch 1-5 Working Day
  • Pallet -1-3 Days
  • Standard 1 -3 Day Carrier
  • Economy 1-3 Day Carrier
  • Click & Collect from store


The cost of the carriage will be displayed before your final checkout. Free delivery is available on most items for orders over £250, exceptions do apply.

Click And Collect

Please note that our stock levels are not live. Please contact your local branch prior to purchase, so that we can ensure the product is available to you. If the product isn’t available, we can organise this through an alternative branch.


  • Orders will only be dispatched and delivered on weekdays.
  • Orders for the next working day delivery must be placed before 2 pm, this gives us time to pick and pack before the carrier arrives to collect.
  • We aim to dispatch all carrier delivered items within 48hrs, and all items delivered on our own transport within 5 days, Monday to Friday. Saturday Delivery can be made upon request, depending on availability.
  • An email will be sent when your goods leave us via Carrier, this email will include tracking information. If your order is delayed for any reason, we will contact you.
  • If delivery is from a Branch, then a member of our team will be in contact with you.


We pride ourselves on our customer service, but mistakes can happen. If you receive an incorrect or faulty item, please notify us within 30 days to arrange a refund, return or exchange.

Retrofit Underfloor Heating Overlay Pack

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