The project, which involves waterproofing a combined roof area in excess of 6,000 square metres, has been completed with the firm’s Elastaseal™ system.
The existing asphalt roof membranes had been degraded by thermal fluctuations that had resulted in water ingress, which was becoming increasingly problematic.
As a roofing substrate, asphalt is naturally susceptible to the effects of the weather and repeated freeze-thaw cycles cause it to blister, rivel and ultimately crack, opening the floodgates for ponded water to enter the building.
The University required a long-term solution to the problems it was experiencing and refurbishing with asphalt was not a desirable option. Being prone to the weather, asphalt doesn’t make a good refurbishment material however the major negative associated with the substrate is the requirement it must be applied in a molten state.
Hot works on roofs pose a serious fire risk and cannot be undertaken while a building is occupied. Elastaseal™, from Tor Coatings, provided the most practical and effective long-term solution. Elastaseal™ is a cold liquid-applied waterproof coating system that can be applied directly over an existing roof membrane to prevent roof leaks for up to 25 years, depending on the specification.
Elastaseal™ works by seamlessly encapsulating the existing roof substrate, creating a new membrane that is not only 100% waterproof but also allows the roof beneath to ‘breathe’ due to its vapour permeability.
The Elastaseal™ coating system was applied to the University roof by brush and roller, just like a regular paint. It offers the significant advantages of no on site mixing and no need for naked flames as with comparable hot work bitumen roofing systems.