Sifco ASC’s Independence, Ohio location was leaking at multiple locations. The culprit was an aging Tar & Gravel roof. What is Tar & Gravel? “They are an old-fashioned type of commercial roofing. Tar & Gravel roofs, also called Built-Up roofs, are made of alternating layers of fiberglass or felt applied with hot tar. This layer is then covered with loose gravel to protect the tar from damaging UV rays. These tar-based roofs are vulnerable to cracking and shrinkage caused by repeated heating and cooling. Cracks can randomly appear along the roof surface, allowing water to penetrate down to the lower layers, if not entirely through into the building. As you can imagine, even the cracks that do not penetrate entirely through will still speed the breakdown process.
Sifco ASC contacted us, hoping we would have a superior roofing system to offer. A thorough inspection showed that Single Ply PVC was an appropriate solution.
Our inspection showed that the upper section of the roof required a complete tear off down to the metal decking. The lower section how ever was still solid and a layover could be installed. All the gravel was removed from the roof surface prior to installing the Single Ply PVC.
Solving The Problem
We worked with Sifco ASC to determine the roofing system that solves their problem and fits their budget. 60 Mil. thickness Single Ply PVC was the selected roofing system.
First, we stripped the upper roof to the metal decking, and we installed a tapered ISO Insulation Board. This promotes drainage and increases roof R-Value. Over the ISO Board, we installed PVC, and each seam was welded, creating a durable roof surface.
On the lower section, we removed the gravel and installed a 1.5 inch ISO Insulation Board over the entire roof. This roof is both reflective and insulative. This roof will likely pay for itself in lower energy bills in a few years.
Total Square footage was approx. 29,000 sq feet.
Time from start to finish was 4 weeks.