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dual overlay

Dual Overlay

Dual Overlay is a free-floating subfloor for use with the Foil Heater under carpet, vinyl and linoleum floor finishes.

Guide Price
£85.24 RRP ex. VAT

Key Benefits


Provides a stable subfloor

On which a variety of floor coverings can be laid


Protection for the heating system

Ensures that the entire heating system is protected underneath the finished floor covering.


Very thin at only 7mm in depth

Easy to install and minimal impact on floor levels.

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What is the Dual Overlay System?

Dual Overlay is recommended for use with Warmup’s Foil Heater and Insulated Underlay for a complete electric underfloor heating solution perfect for softer floor finishes.

The two layers of Dual Overlay sit above the Foil Heater, acting as a strong and stable subfloor that protects the floor heater from heavy load points such as large bookcases or beds. The system is free-floating and quick and easy to install.

dual overlay


Composed of a separate Top Board and Base Board, the Dual Overlay’s two layers are positioned above one another with staggered and overlapping joints to guarantee a strong subfloor. The system is available for purchase in packs of 4 pairs of boards, offering coverage of 2.88 m2. As a floating subfloor, the Dual Overlay System is not fixed to the floor below and offers a quick, clean installation without the need for screed.

Some floor manufactures only allow the use of underfloor heating systems with their flooring when embedded within a screed/ leveling compound. It is important that you check with the vinyl or carpet manufacturer on the types of underfloor heating systems that are suitable for you chosen floor finish.

Technical Information

Product Documentation
Technical Specifications
Size 1200mm (L) x 600mm (W)
Thickness Base board – 3mm
Top board – 4mm
Composition MDF, fitted with an interactive adhesive
Density (kg/m³) 770
Bending Strength kg/cm² >40
Humidity (%) 4-10
Thermal R value (m²K/W) 0.047
Fire Class, DIN4102 B2

Price Guide
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  • ✓ Ideal for zones less than 25m²
  • ✓ Ideal for single rooms
  • ✓ Does not alter floor levels
  • ✓ Great for renovations

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  • ✓ Ideal for larger zones over 25m²
  • ✓ Rapid auto heat loss calculations
  • ✓ Compatible with existing central heating systems
  • ✓ Great for new-builds

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