Roof Replacement Saves School £98K

The existing roof build-up consisted of approx 35mm PUR insulation, which was insufficient to meet the thermal efficiency needs of the school and building regulations. A warm roof design utilising the BBA-certified StressPly Flex Plus system was specified for its superior tensile strength, allowing thermal movement without the risks of breaks in the membrane. 

Approved Contractor NRA Roofing began the 3000 sqm roof refurbishment by isolating the wet roof areas and stripping this back before reinstating the roof to existing levels. The roofs were overlaid with new cut to falls insulation to provide a significant thermal upgrade to the school and eradicate the existing standing water issues.

The design also included tapered gutters to ensure clear drainage channels, which would further reduce the risk of ponding water in the future.

The works were carried out during the school’s term time, which meant an open channel of communication was established and maintained from the outset between Ferry, the Trust, NRA Roofing and RLB, with distinct phases of work and regular meetings in place to ensure disruption was minimised at every stage.

The preliminary in-depth investigations conducted by Ferry and the proposed overlay, compared to the third-party advice to strip the roof to the existing deck, saved the school £98,000 in labour, materials and skip costs and avoided over 30 tonnes of waste material going to landfill.

The thermal efficiency upgrades ensured that the school achieved a 0.18 W/m²K U-Value, and on project completion, Ferry supplied the Trust with Garland’s industry-leading 25 year Single-Point Guarantee for the StressPly Flex Plus system, which accepts the full liability for the design, system and installation quality of the project.