Permatec Biodiverse Brown Roof System
Lightweight green roof systems, usually incorporating sedum mats or sedum plug plants and minimal growing medium (concrete, metal or composite decks).
- Concrete deck primed with Permatec Primer
- 2 coats of Permatec Anti-Root incorporating Permaflash-R reinforcement
- Permaguard-F protection layer
- Rigid board insulation
- Water control layer
- Drainage / Moisture retention layer
- Broken rubble / brick
- Biodiversity Growing Medium
- Wildflower seed mix
Substrate Preparation
Ensure the surface of the substrate (concrete, plywood, calcium silicate board, metal/insulation composite, etc.) is properly prepared to accept the Permatec fully bonded system. Detail joints, cracks, or interfaces between different substrate materials following Permatec Anti-Root Standard Drawings and Masterspec 4414AP specification.
Membrane Application
Apply the first coat of hot Permatec Anti-Root compound to the prepared substrate using a suitable spreader or squeegee. Maintain a nominal coat thickness of 3mm. Brush the Permaflash-R polyester reinforcement into the hot Permatec Anti-Root compound, ensuring that all laps in the Permaflash-R are at least 75mm wide and fully sealed with the Permatec Anti-Root compound. Apply the second coat in the same manner, ensuring complete coverage of Permaflash-R at the nominal coating thickness of 3mm. Protect the second coat of Permatec Anti-Root.
Protection
The standard protection layer, Permaguard-F sand surfaced bitumen membrane, is applied directly to the second coat of Permatec Anti-Root while still hot and tacky. It is used on the main horizontal area, which will later be covered with various system components such as insulation, separation layer, drainage/moisture retention layer, biodiversity substrate mix, and wildflower seeds. It is also used on unexposed detail items. Ensure minimum 75mm laps in Permaguard-F are 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 using a controlled torch application. Laps in Permaguard-M should be a minimum of 75mm and fully sealed.
Detailing
Properly detail rainwater outlets and penetrations in the roof waterproofing system following Permatec Standard Drawings and Masterspec 4414AP specification.
System Components
A standard Permatec biodiversity green roof system includes a range of components: insulation, separation layer, drainage/moisture retention layer, biodiversity substrate mix, and wildflower seeds or other vegetation, according to designers’ requirements.
Downloads
Neuchâtel Permatec Standard Detail Drawings
Permatec Biodiverse Brown Roof System Drawings
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