The granules in asphalt shingles make them more pliable. They are also more resistant to thermal cracking from sun exposure, and hail damage to a greater extent.
Most insurance companies discount their rates for impact-resistant shingles so there’s an immediate benefit. They also add a measure of increased fire resistance. Hence the granules do considerably more than giving your roof a nice texture.
How Surface Granules Attach to Shingles But Come Away
Granules are mixed into the raw material during manufacture. Some embed deeply. Others are on the surface where they interlock with those within. Many surface ones loosen and shed during packaging, shipping and installation. The rest adhere for a while.
However, the Surface Granules Don’t Last Forever
Granules gradually come loose over time as a shingle roof ages. Hail, rain and high winds accelerate this process. Some of the granules bounce off or blow away. However, most wash down the roof into the eavestrough system, and accumulate at the bottom of down pipes.
The general appearance of your roof is another warning sign. If you see bare or discoloured spots, your roof may be losing one of its primary defences. Then it is time to ask a qualified roofer to inspect. Dial (403)829-1661 in Calgary, Alberta to discuss solutions.
There’s an Insurance Angle to This
Insurance companies generally don’t regard surface granule loss as functional damage. The roof still works, and that’s good enough for them. However, the actual speed with which this happens depends on the quality of the shingles. Insurance companies expect homeowners to be responsible. You cannot ignore a deteriorating roof.
Does This Mean I Need a New Roof
Not necessarily, however you do need to replace the damaged shingles to ensure your home remains weather proof. New against old inevitably makes a roof look patchy. There’s a tipping point beyond which you need a new roof. Get free advice from Valiant Exteriors in Calgary.
You may also just need a section of your roof replaced. That’s because some slopes are more exposed to the elements than others. If you are in Calgary speak to Valiant Exteriors first before you decide. They only do quality repairs and replacements. The proof is in the calibre of their work.
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