Permaguard-F sand surfaced bitumen membrane is the standard protection layer. It is applied directly to the second coat of Permatec Anti-Root whilst it is still hot and tacky. It is used on the main horizontal area which is to be subsequently covered with a range of system components such as insulation, separation layer, drainage/moisture retention layer, biodiversity substrate mix, wildflower seeds etc. It is also used on unexposed detail items. The Permaguard-F protection layer should be rolled into the hot
Permatec Anti-Root as quickly as possible. Laps in Permaguard-F to be minimum 75mm and sealed using hot Permatec Anti-Root compound.
Permaguard-M slate surfaced bitumen membrane is used on exposed upstand details. It is applied to the second coat of Permatec by controlled torch application. Laps in Permaguard-M to be minimum 75mm and fully sealed.
Rainwater outlets and penetrations in the roof waterproofing system should be detailed in accordance with Permatec Standard Drawings and Masterspec 4414AP specification.
A standard Permatec biodiversity green roof system will include a range of components including: insulation, separation layer, drainage/moisture retention layer, biodiversity substrate mix, wildflower seeds or other vegetation in accordance with designers requirements.