50mm Rigid Insulation Board 1200×2400

50mm Rigid Insulation Board for Roofing & Condensation Control

The 50mm rigid insulation board is a versatile mid-range option for roofing projects where improved
thermal performance is required without moving to deeper build-ups. Supplied in large
1200mm × 2400mm sheets and sold per sheet, it is commonly used in warm roof constructions,
refurbishments and performance upgrades.

At 50mm thickness, this rigid insulation board offers a noticeable step up in thermal resistance
compared to thinner boards, helping to raise internal surface temperatures within the roof build-up.
When correctly detailed alongside suitable membranes, ventilation or vapour control layers,
this can significantly reduce the risk of condensation forming within roof structures.

50mm rigid insulation boards are widely used where designers and contractors need a balance between
thermal improvement and build-up height. They are lightweight for their size, easy to cut accurately on site,
and well suited to detailing around roof penetrations, abutments and perimeter junctions.

As with all insulation products, performance depends on the overall roof design.
Consider ventilation strategy, airtightness and moisture control as part of the wider system.
Where uncertainty exists, professional assessment is recommended before installation.