Solutions: Multi Foil PhotonAir - New Build & Extension Roof Insulation
| Application | Rafter | Uvalue | Draped | Counter batten |
| New build & extensions roof |
400 | 0.16 | 190mm Glass | 140mm PIR |
| 600 | 170mm Glass | 120mm PIR | ||
| Contact us for bespoke solutions | ||||
New Build & Extension Roof Insulation
When constructing a new home or adding an extension, roof insulation plays a vital role in meeting modern energy standards and long term performance expectations.
Today’s building regulations demand lower U-value and improved airtightness, making roof design a critical component of the overall thermal envelope.
PhotonAir multi foil insulation provides a high performance, integrated solution that supports compliance while maintaining practical construction methods.
A Modern Roofing Solution for Contemporary Builds
New build and extension projects benefit from insulation systems that are efficient, reliable and straightforward to install. PhotonAir combines multi foil thermal technology with a breathable underlay, allowing it to be fitted in the same way as traditional roofing felt. This simplifies installation while delivering enhanced thermal resistance and moisture control in a single product.
Its construction includes a high density glass wool core to minimise heat transfer, paired with a perforated reflective lower layer that helps redirect heat back into the building. The integrated breathable membrane allows moisture vapour to escape, reducing the likelihood of condensation within the roof structure. The result is a watertight, thermally efficient roofing layer suited to both pitched new build roofs and residential extensions.
Typical Specification for New Build & Extensions Roofs
To achieve strong thermal performance in line with modern standards, the following build ups are typical:
400mm Rafter
- Target U Value: 0.16 W/m²K
- PhotonAir Draped: 190mm Glass
- PhotonAir Counter Battened: 140mm PIR
600mm Rafter
- Target U Value: 0.16 W/m²K
- PhotonAir Draped: 170mm Glass
- PhotonAir Counter Battened: 120mm PIR