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.
Permaguard-HDPB (Heavy Duty) or Permaguard-PB protection boards can be used to provide additional protection to the waterproofing system. They are installed butt-jointed to the second coat of Permatec compound. Joints are taped over with 75mm reinforced adhesive tape.
Note: The use of a drainage layer in podium deck design is highly recommended, as it provides important lateral drainage whilst also preventing the sand and cement bedding from becoming saturated.
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 podium deck system will include a range of system components including: drainage layer to suit loading, sand and cement bedding or paver supports and pedestrian paving.