Insulated plasterboard, also known as insulation-backed plasterboard or thermal plasterboard, is a high-performance building material designed to improve energy efficiency without adding bulk.
By bonding a rigid insulation layer such as PIR or phenolic foam to standard 12.5mm plasterboard provides thermal insulation, drylining, and vapour resistance in a one time-saving product.
These boards are ideal for internal walls, ceilings, and room-in-roof spaces, particularly in projects where saving space matters. They’re compatible with both mechanical fixings and dot and dab adhesive methods.
Key features include:
- Slim profile, strong performance available in multiple thicknesses (typically from 37.5mm up), helping to meet or exceed U-value targets with minimal loss of floor space.
- Built-in vapour control layers. Many options feature foil facings or integrated vapour barriers to help prevent moisture build-up in solid wall constructions.
- Versatile insulation types, including PIR, phenolic, or EPS cores, are suited for various performance and budget requirements.
- Leading manufacturers like Celotex, Kingspan, Ecotherm, and Unilin offer boards tailored for different wall and roof applications.
Whether you're lining a cold masonry wall or insulating a pitched roof, insulated plasterboard offers a clean, efficient solution that reduces the need for separate layers, helping to cut down on installation time while boosting thermal efficiency.
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