Ten years ago, the most commonly used roofing system in Lethbridge on a low slope to flat roof was the tar and gravel system. Tar and gravel had a lifespan of approximately 20 years but warranties were very limited. The old system included layers of tar paper and hot asphalt with multiple applications to keep the water out. After the tar and paper is in place, several tons of pea gravel are spread over the roof with hot asphalt.
When we first began in the business, this was the standard, as the rocks were used to protect the tarpaper from the UV rays of the sun and the weight of the rocks kept the system from blowing away. As we grew in the industry, we found more and more leaks in these roofs. The hardest part is the actual waterproof system is buried under several tons of rock and had to be scraped back just to look for the problems, which is a very time-consuming process. Whether we're repairing Residential or Commercial roofing, we have the experience in the industry to know not only WHY older roofing was used, but now what newer materials and methods work more efficiently. Once applied on your roof, you'll be set for many years to come with regular maintenance.