
Prowarm in-joist/ Batten underfloor heating panels have an expanded polystyrene base with foil-faced insulation on top. They are designed to perfectly fit 350mm floor joists. These in-joist foil panels have pre-cut grooves that completely secure 16mm and 15mm pipework.
Both the expanded polystyrene and the foil-facings on top ensure that the heat generated by the underfloor heating is directed upwards towards the floor. This completely eliminates the chances of heat loss through the subfloor. These underfloor heating panels are ideal for suspended floors.
The best part about using this underfloor heating panel is that it completely eliminated the need for a foil-failed insulation board like PIR for example and a separate spreader plate. With a firm base of expanded polystyrene, these in-joist foil panels are much stronger and more sturdy compared to metal spreader plates.
Key Features:
- High-performing underfloor insulation panels with combined features of expanded polystyrene and foil-faced insulation.
- Allows the heat generated to be directed towards the floor. Restricts heat loss.
- Batten or In Joist foil panels completely eliminate the need for a separate spreader plate and foil-faced insulation boards
- Perfectly fit between floor joists.
- In-joist foil panels come with pre-cut grooves that help secure the pipework
- Underfloor heating panels have a superior compressive strength
Installation:
The in-joist foil underfloor heating panel is about 50mm deep, which means there must be a difference of 50mm between the top of the joist and the top of the batten.
Start by fastening battens to the sides of the joists, with the top of the batten 50mm below the top of the joist. Then place and secure the in-joist underfloor heating panel on the top of the batten. This will allow the in-joist/batten foil panel to align perfectly with the top of the joist. The underfloor heating pipes are then inserted into the pre-cut grooves of the underfloor heating panel. Installation is then completed by installing the finished floor.
- Product Size: 1200mm x 350mm x 50mm
- Foil-faced expanded Polystrene underfloor heating panels
- Suitable for 15mm and 16mm pipework. Pre-cut grooves for securing pipes
- Underfloor heating panels perfectly fit between joists
- Eliminates the need for separate spreader plates and foil-faced insulation
| Insulation Type | Underfloor Heating Panel |
| Brand | Prowarm |
| Material | Expanded Polystyrene - Grade EPS100 |
| Facing | Foil-Faced on one side |
| Panel Dimensions | 1200 x 350 x 50mm |
| Aluminium Foil Thickness | 45 microns |
| Compressive Strength | 100 kPa @ 10% compression |
| Fire Classification | Euroclass F |
| Suitable For | 15mm and 16mm pipes |
| Order Value | Delivery Charges (Excluding VAT) |
|---|---|
| Up to £346.00 | £9.99 anywhere in the Mainland UK |
| Above £346.00 | £25.00 anywhere in the Mainland UK |
Returns and Cancellations:
- You can cancel your order and get a full refund before we confirm your order via email.
- Orders cancelled after the email confirmation is sent, may attract a restocking fee.
- You are welcome to return the products ordered in excess/no longer required, via post or couriers, provided they are in the original packaging and in a resalable condition within 14 days of delivery. Return requests made after 14 days will not be entertained.
- If wrong products were delivered or delivered items are faulty, please email us and we will assist you accordingly.
For more information, please refer to our Delivery information page

