Fire Performance

Exceeding Fire Resistance Standards

SIPs provide exceptional fire resistance, with the external wall linings playing a key role in meeting safety standards. Typically, a single layer of 12.5mm Type F (fire/high temperature) plasterboard, fixed to timber battens to form a service void, offers 30 minutes of fire resistance, regardless of the SIP type or core insulation used. For enhanced protection, two layers of the same plasterboard can achieve 60 minutes of fire resistance, demonstrating the versatility and durability of SIP construction.

Fire Resistance in Roof and Floor Systems

Fire resistance requirements for roof structures are generally not specified unless the roof serves as an escape route or is part of a habitable space. In such cases, the floor of the room-in-roof must provide 30 to 60 minutes of fire resistance. This can be accomplished using metal web joists, timber ‘I’ joists, or robust room-in-roof trusses. Similar to timber joisted floors, plasterboard is often used to ensure effective fire protection.

Supporting Evidence and Further Resources

Extensive empirical testing supports the fire resistance of SIP buildings, as detailed in the BRE Information Paper IP21/10. Funded by the DCLG and conducted in an independent laboratory, these tests assess the performance of SIP systems in realistic fire scenarios, reinforcing their safety and effectiveness.

By choosing our SIPs, you benefit from advanced design, precise manufacturing, and a commitment to exceeding fire safety regulations, ensuring your construction project surpasses required standards.