Applying Overcoat to Asphalt

How to apply the Overcoat roofing system to waterproof Asphalt roofing

Surface preparation

Any dirt, soil or other contaminants must be removed from the roof’s surface before installing the Overcoat Roofing System. After the initial cleaning, the surface should be power washed and rinsed to remove all residual dirt and contaminates after which the surface should be dried.

Adhesion of the existing coating system must be checked and all defective coating be removed back to a firm edge. Any ballast chippings present must be removed with a mechanical flail. Deeply embedded chippings need not be removed if removal would result in extensively damaging the asphalt. Any badly degraded asphalt must also be removed. Any badly degraded asphalt must also be removed.

Asphalt blisters are to be cut open, exposing the surface which should then be dried, then rebuilt with a cementitious mortar. Failure to remove all loose chippings will invalidate any Basecare guarantee.

Applying the Overcoat

Once the surface preparation has been completed you apply the Overcoat system with a standard roller or brush at a rate of approximately 1 kg per square metre. The Overcoat layer will become instantly watertight and can immediately withstand rainfall. After 24 hours the surface can take foot traffic and a full cure of the system will take around 7 days.