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The EcoTherm Eco-Versal PIR rigid insulation board is a versatile, high-efficiency solution designed for use in floors, walls, roofs, ceilings and dormer cheeks. With foil facings on both sides and a fibre-free PIR core, Eco-Versal delivers excellent thermal performance and is suitable for both new construction and upgrading existing structures.
Eco-Versal is marketed as a “5-in-1” insulation board because its design allows it to perform across multiple building elements — from cold flat roofs to pitched roofs, solid walls, timber frames, and floors.
Thanks to its low λ-value and high rigidity, Eco-Versal allows you to achieve low U-values with thinner build-ups compared to many conventional insulation materials. Its compressive strength and structural stability also support use under load in floor zones and roof assemblies.
A key benefit is the integral vapour control effect from the foil facings, which can reduce the need for a separate vapour barrier in many applications. However, in high humidity or critical scenarios, additional VCL (vapour control layer) consideration per BS 5250 is recommended.
The ideal thickness depends on your application and target U-value. For most internal walls, 50–75 mm is typical, while 100–150 mm is suited for floors and roofs. Thanks to its low λ-value (0.022 W/m·K), Eco-Versal achieves excellent performance with less material. Always confirm requirements with your designer or building control.
Yes. Eco-Versal performs exceptionally well in loft conversions and room-in-roof builds. It helps maintain comfortable temperatures and reduces heat loss through pitched roofs or dormers. Install between and under rafters, sealing joints with foil tape for an airtight finish.
Boards can be easily cut with a fine-tooth saw or sharp knife. Score, snap, and trim to fit. Ensure boards are tightly butted, and seal all joints with foil tape to maintain vapour control. Fixings vary by substrate — follow EcoTherm’s guidance for adhesives or mechanical fixings.
Usually not. The reflective foil facings act as an integral vapour control layer. In high-humidity zones such as bathrooms or flat roofs, add an extra VCL per BS 5250 for maximum protection.
Yes. Eco-Versal is suitable beneath screed in ground-bearing or suspended concrete floors. With a compressive strength of about 140 kPa, it supports domestic and light commercial loads while enhancing underfloor heating efficiency by reducing downward heat loss.
Eco-Versal achieves a Class 1 / Euroclass E reaction-to-fire rating (EN 13501-1). While not non-combustible, it performs well compared with other rigid foams. Installed behind plasterboard, screed, or render, it complies with UK Building Regulation fire safety standards.
EcoTherm PIR boards have zero ODP and low GWP blowing agents. Their high efficiency helps reduce operational carbon emissions over a building’s life. They’re long-lasting, recyclable, and compliant with modern sustainability goals including Part L and BREEAM.
| Specification | Value / Range |
|---|---|
| Board Dimensions | 1200 mm × 2400 mm |
| Thickness Options | 25 mm – 150 mm (varies per application) |
| 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 |
