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What Granule Loss Means for Your Roof

Posted August 25, 2015 by Daniel White

If you clean your own gutters, you might see some granules from your composition roof collecting in the bottom. We typically see composition roofs lose granules over time. But if you have an excessive amount, we might have a serious issue.

Your roof is put together with a mat, asphalt, and then the granules. And the granules serve two purposes. First, it protects your roof from the wear and tear of the sun and helps it last for decades. Secondly, it’s what makes your roof look good; it gives you the color variations of green, red, tan, or whatever you’re looking for. If you lose those granules and all of the sudden that asphalt’s exposed, your roof goes downhill very fast. So what can cause granule loss?

Power Wash Uh-Oh
If you’ve had some moss on your roof and wanted that removed, you might have hired a contractor to come clean it. Unfortunately, these guys sometimes use a regular power washer that you could get at a big box store. Those things run off of three thousand PSI, pounds per square inch. They can do a lot of damage to your roof. Yeah, it looks a little better, but they’ve knocked off a lot of granules in the process and the granules are what protect your roof.

Ventilation
Another thing that could cause granule loss is ventilation, which is key for your home. If your roof isn’t ventilated properly, the inside of your attic is cooking your shingles. Cooking the shingles lightens up the asphalt and the granules begin to fall off.

Bad Asphalt
The problem could also be a bad batch of asphalt. Some shingle manufacturers receive bad shipments into their plants. It’s not their fault, but they end up producing these shingles from the bad asphalt and sending them out to customers. Seven, ten and twelve year-old roofs are seeing major granule loss now because of this batch of asphalt. If that happens, Roof Life of Oregon will let the client know that they may have a warranty claim.

Old Age
Your granule loss could really just be the age of the roof. If we know that to be the case, we’ll probably recommend that you do nothing to the roof. You don’t have to replace it now, but don’t touch it. Don’t get the moss off and just the get next three to five years out of your roof.

If you have granule loss, our typical advice will be not to do anything to it. Anything you do to that roof could cause it to depreciate even faster. If it’s a warranty claim, get on it right away, because the manufacturer may not cover it if you do anything to your roof. Call Roof Life of Oregon and let us give you a free inspection so we can diagnose your granule loss and make sure you take the right steps for your roof.

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