The THERMO Roof creates an insulation value of 1.6 W (m2K) thus allowing the units to have a better ambient temperature. The roof is a blown roof which is inflated with a small, low power compressor unit. This creates an air pocket to give the insulation. The Thermo roof is also useful for reducing noise and dramatically reduces the risk of condensation. ​ The roofs are manufactured in a translucent white PVC material which is flame retardant to BS5438 part 2. The translucency allows for a high degree of natural light to be transmitted. Other colour roofs are available if required, however, these do deduct the amount of light that is transmitted into the building and may increase heat build-up.