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).

  1. Concrete deck primed with Permatec Primer
  2. 2 coats of Permatec Anti-Root incorporating Permaflash-R reinforcement
  3. Permaguard-F protection layer
  4. Rigid board insulation
  5. Water control layer
  6. Drainage / Moisture retention layer
  7. Broken rubble / brick
  8. Biodiversity Growing Medium
  9. Wildflower seed mix
20 Year System Guarantee
Permatec Biodiverse Brown Roof System

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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