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The Mannok Therm PIR insulation board is a high-performance, rigid insulation solution for floors, walls, roofs, ceilings, and dormer cheeks. With foil facings on both sides and a fibre-free PIR core, Mannok Therm provides excellent thermal efficiency and helps buildings achieve low U-values while maintaining a slim build-up. Suitable for new construction and retrofits, it supports both residential and commercial applications.
Mannok Therm boards are designed for multi-application use, covering all major building elements from flat roofs and pitched roofs to solid masonry walls, timber frame constructions, and floors. The foil facings help reflect radiant heat and provide integral vapour control, making it easier to meet regulatory thermal and moisture requirements without adding additional layers.
Thanks to the low thermal conductivity of Mannok Therm PIR (0.022 W/m·K), it allows achieving low U-values with thinner insulation than traditional materials. Its rigid structure ensures stability in floor or roof applications and supports light to medium loads without deformation.
The foil facings contribute to both radiant heat reflection and vapour control, reducing the need for an additional vapour barrier in many internal applications. In high-humidity areas, such as bathrooms or flat roofs, an extra vapour control layer may still be required to comply with BS 5250 standards.
Mannok Therm PIR is also compatible with underfloor heating systems. The board directs heat upward efficiently while reducing downward heat loss, improving system performance.
For walls, 50–75 mm is typical, while floors and roofs may require 100–150 mm depending on U-value requirements. The low λ-value allows excellent thermal performance with thinner material compared to mineral wool or EPS.
Yes, Mannok Therm PIR boards are ideal for loft conversions and room-in-roof insulation. Their rigidity supports installation under loads, while the foil facings reduce radiant heat loss and contribute to vapour control.
Yes. The boards’ compressive strength (~140 kPa) allows installation beneath screed in both suspended and ground-bearing floors. They improve underfloor heating efficiency and provide consistent thermal performance.
Use a fine-tooth saw or sharp knife to score and snap boards. Ensure tight joints and seal with foil tape to maintain vapour control. Follow manufacturer recommendations for fixings and adhesives for wall, floor, or roof applications.
The foil facings act as an integral vapour control layer. In high-humidity zones such as kitchens, bathrooms, or flat roofs, additional VCLs may still be necessary to comply with BS 5250.
Mannok Therm PIR boards typically achieve Euroclass E / Class 1 (EN 13501-1). Installed behind plasterboard or screed, they meet UK building regulation requirements for fire safety in residential and commercial buildings.
Yes. They are made with zero ODP and low GWP blowing agents. Their high thermal efficiency reduces operational energy use, and the boards are recyclable at end of life. Suitable for projects targeting sustainability standards like Part L compliance and BREEAM certification.
| Specification | Value / Range |
|---|---|
| Board Dimensions | 1200 mm × 2400 mm |
| Thickness Options | 20 mm – 150 mm (varies by panel) |
| Thermal Conductivity (λ) | 0.022 W/m·K (typical) |
| Compressive Strength | ~140 kPa at 10% compression |
| Density | ≈32–35 kg/m³ |
| Facing | Aluminium foil composite, both sides |
| Vapour Control | Integral (foil facings) |
| Fire Performance / Reaction to Fire | Class 1 / Euroclass E (EN 13501-1) |
| Service Temperature | -50 °C to +100 °C |
| Application Areas | Floors, walls, ceilings, pitched roofs, dormer cheeks |
| BBA Certification | Yes — applicable for specified uses |
