Building Regulations When Tackling New and Existing Flat Roofs

Where a cold roof is the selected or default construction (warm roof conversion impossible) there is an accompanying need to cross ventilate as well as ensuring any link with an external cavity wall is protected against damp ingress.

The Type RAV-FL flat roof ventilator from Cavity Trays of Yeovil provides a protected airflow route via which air can enter the wall/roof intersection.

A preformed cavitray at higher level protects and over-flashes the assembly.

Type RAV-FL and Type E – a compliant combination from Cavity Trays.