25mm Rigid Insulation Board 1200×2400

25mm Rigid Insulation Board for Roofing & Condensation Control

The 25mm rigid insulation board is a practical solution where you need to improve thermal performance
without significantly increasing build-up depth. Supplied in 1200mm × 2400mm sheets and sold per sheet,
it is well suited to roofing upgrades, refurbishment projects and detailing work where space is restricted.

Rigid insulation boards help raise internal surface temperatures within the roof build-up, reducing the likelihood of
condensation when used as part of a correctly designed system. At 25mm thickness, this board is commonly
used as a secondary insulation layer, within service zones, or where incremental thermal improvement is required without
altering roof levels or junction details.

Lightweight and easy to handle, 25mm rigid insulation boards can be cut accurately on site to suit roof edges,
penetrations and abutments. This makes them a reliable choice for contractors carrying out remedial work, warm roof
upgrades or targeted improvements alongside ventilation and moisture control measures.

As with all insulation products, performance depends on the overall roof build-up. Correct sequencing with membranes,
ventilation components and vapour control layers is essential to achieve long-term results. If you are unsure,
professional assessment is recommended before installation.