Perfobase
Perforated reinforced base sheet, to relieve water vapour pressure, from under multi-layer torch-on membrane systems.
Perfobase is a perforated, reinforced fibreglass mat, impregnated with special polymer modified bitumen which is compatible with both APP and SBS bitumen membranes. A flamina film which melts when torched protects both sides of the membrane. The 4 cm diameter perforations are distributed evenly over the surface of the membrane, with 119 holes per m2 . Perfobase guarantees the uniform distribution of the bonding areas while using a torch, with no particular expertise of the operator required.
USES
Perfobase is used for spot bonding membranes with a torch. It should be used as a first connecting layer to avoid the formation of blisters in waterproofing membrane applied on concrete which will remain visible to the eye. Perfobase acts as a vapour diffusion layer if it is used as a connecting layer between a vapour barrier to be applied on a cement substrate of environments with a high level of relative humidity. The same goes for restoration when it is used to connect a new layer which will remain visible, with an old bituminous surface which has captured humidity. The choice of using a spot bonded connecting layer should be subject to the careful evaluation, by the planner of the roof and of the wind force present where the membranes will be applied.
ADVANTAGES
- Allows the homogeneous distribution of spot- bonded adhesion zone
- The above layer is more resistant to the wind and is more stable to temperature variations
At Illawarra Industrial Supplies, we offer a complete range of sheet waterproofing membranes and provide expert advice to help you choose the best solution for your needs. Contact us today to get started.
Product specification sheet
Perfobase product specification sheet opens in a new windowManufacturer
Sika Australia
