Fascia and Soffits help protect the fabric of your building in several ways They allow the roof space to breathe And they help make the building look smart. Reduce the build up condensation and damp. Protect the roof space from nesting birds. To finish the roofline replacement, choose between a foam soffit board or hollow alternative. Both give the desired finish as the installations highlight. By replacing your roofline timber you will have a strong, smart and extremely durable presentation.