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INSBOARD6MM
Warmup INSBOARD6MM Insulation Board – 6mm Waterproof Tile Backer for Underfloor Heating Efficiency
The Warmup INSBOARD6MM is a high-performance insulation board designed to improve the efficiency of underfloor heating systems. With a 6mm thickness, this water-resistant tile backer board is made from durable extruded polystyrene and reinforced with fibreglass mesh and cement polymer coating for added strength and stability.
- Improves Heating Efficiency: Reduces heat loss and speeds up warm-up times when used with underfloor heating systems.
- 6mm Low-Profile Design: Ideal for projects where floor height is a concern, without compromising insulation performance.
- Water-Resistant Construction: Suitable for use in wet areas such as bathrooms and kitchens.
- Durable & Rigid: Cement-coated, mesh-reinforced surface provides strength for tiling and long-lasting performance.
- Easy to Install: Lightweight and simple to cut and fix with appropriate adhesive or mechanical fixings.
Technical Specification
- Product Type: Insulated Tile Backer Board
- Material: Extruded polystyrene with fibreglass mesh and cement polymer coating
- Board Size: 1250mm (L) x 600mm (W)
- Thickness: 6mm
- Water Resistance: Yes
✅ Use Warmup INSBOARD6MM to maximise the efficiency and performance of your underfloor heating system while maintaining a low floor build-up!

Range | Warmup INS Insulation Boards |
Product | Underfloor Heating |
Type | UFH Insulation Board |
Delivery Options:
- PRIORITY DELIVERY – Next Working Day (All items in stock and ordered before 3 pm) - £7.08 inc-VAT. (£5.90 ex-VAT)
- Orders Over £100 (before VAT): We offer free standard shipping on all orders shipped to UK mainland addresses
- Orders under £100 (before VAT): Our standard delivery fee to UK mainland addresses is £5.90 ex-VAT (£7.08 inc-VAT)
*Delivery charges to JE, GY, TR, BT, IM, IV, HS, KW, ZE and certain PA post codes are £12 ex-VAT for all orders (Prices subject to change).
Items requiring specialist shipping:
- Orders containing Solar Panels, Batteries and/or Inverters: Up to 50 qty will be dispatched on a pallet and incur a £120 ex-VAT delivery charge**.
**Delivery charges to JE, GY, TR, BT, IM, IV, HS, KW, ZE and certain PA post codes are £180 ex-VAT (Prices subject to change).
Contact us if you have any further questions.