Heat-Pak Dual Overlay System

The Heat-Pak Dual Overlay System is the most stable and effective overlay system designed for electric foil underfloor heating mats and water underfloor heating LoFlo Lite panels. Its innovative design ensures a smooth, durable, and high-performance base for your flooring installation.

• Optimal Subfloor Solution: A free-floating subfloor system specifically designed for use with electric underwood foil heating and LoFlo Lite water heating panels.
• Seamless Surface: Twin-layer panels with an overlap joint configuration eliminate visible lines or patterns under shiny floor finishes.
• Versatile Compatibility: Suitable for various floor coverings including carpet, linoleum, vinyl, and cork.
• Fast & Easy Installation: A dry installation process that eliminates mess, reduces labor time, and allows immediate flooring installation.
• Enhanced Heating Efficiency: Ensures secure placement of heating elements, keeping the system flat and protected while allowing for efficient heat transfer.
• Energy Efficiency: Very low thermal resistance (Rm value: 0.047) ensures quick heat distribution and maximum comfort.
• Built-in Insulation: Supports additional insulation layers under electric systems for improved energy efficiency.
• Premium Quality: Made from high-density MDF, with 3mm baseboards and 4mm topboards, and coated with a specialised adhesive for a secure and lasting bond.

• Panel Size: 1200mm x 600mm
• Top Board Thickness: 4mm
• Base Board Thickness: 3mm
• Material: MDF with interactive adhesive
• Density: 770 kg/m³
• Bending Strength: >40 kg/cm²
• Humidity: 4-10%
• Thermal Resistance: 0.047 m².K.W⁻¹
• Fire Class: B2 (DIN 4102)

1. Split the first row of baseboards in half lengthwise and place the cut edges against the wall.
2. Lay the first board with its cut edges in the corner, then position the rest end-to-end along the wall.
3. Leave an 8-10mm expansion gap around the perimeter and any fixed objects.
4. Continue laying the second row, staggering joints for added stability.
5. Keep the protective film on the adhesive side until the top boards are ready to be placed.

1. Lay the top boards in the same direction as the baseboards with the adhesive side facing down.
2. Position the first board in the corner, overlapping both the first and second rows of baseboards.
3. Peel back only the required amount of protective film to expose the adhesive surface.
4. Secure the board by tapping it down with a rubber mallet, ensuring tight joints.
5. Stagger the next rows by alternating full and half-length boards for a gap-free finish.

• Once installed, glue your final floor covering onto the boards or place it freely on top.
• Test the foil heater(s) and floor sensor before laying the final floor covering to ensure no damage occurred during installation.

Important Notes

• Not suitable for wet areas: Do not use in bathrooms, wet rooms, or en-suites as MDF will expand when exposed to moisture.
• For wet areas, use an underfloor heating mat with a self-leveling compound.
• Ensure an expansion gap of 8-10mm (16mm at door openings) when continuing into adjoining areas.

Upgrade your underfloor heating system with the Heat-Pak® Dual Overlay System – offering unmatched stability, efficiency, and ease of installation for a comfortable and long-lasting floor finish.