Canadian Consulting Engineer

By CCE   

AlphaGrade system restores gravel-surfaced roofs


The top coat can be restored repeatedly.


Before and after. Images courtesy Tremco Roofing.

Tremco Roofing and Building Maintenance has introduced the AlphaGrade Restoration System for gravel-surfaced built-up roofs (BURs) to the Canadian market.

The bio-based, liquid-applied system can help restore aging but still functional BURs, preventing the need for their replacement and thus saving thousands of dollars. Following an assessment that determines a roof can be restored, along with basic repairs and the removal of loose gravel and debris, the product is applied in three layers for waterproofing protection: a levelling coat, a base coat and a highly reflective top coat.

“Gravel-surfaced BURs are durable and long-lasting, but still deteriorate with age,” says Josh Poole, Tremco Roofing’s product manager for liquid-applied systems. “Until now, your options to address these aging roofs included replacement or retrofit—which can be very expensive, labour-intensive, messy and disruptive—or restoration using technologies that offered limited performance. AlphaGrade brings these roofs back to life.”

There is little disruption to those using the building, no odour and no risk of fire from hot kettles. Sealing gravel in place significantly reduces wind-borne debris and its potential damage. And the top coat can be restored repeatedly, further preventing the need for replacement if properly maintained over time.


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