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WHY DO GRANULES FALL OFF MY ROOF SHINGLES?

I`m standing here in the middle of a home inspection at 123Inspections.com and think it`s time to talk about the importance of What is Granule Loss? What Causes Granule Loss? And why it`s important that you and your home inspector, realtor and contractor understand the difference between all the reasons that caused the granule loss on your roof.

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Why Do Granules Fall Off My Roof Shingles?

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I`m standing here in the middle of a home inspection at 123Inspections.com and think it`s time to talk about the importance of What is Granule Loss? What Causes Granule Loss? And why it`s important that you and your home inspector, realtor and contractor understand the difference between all the reasons that caused the granule loss on your roof.


WHAT ARE GRANULES?

We granules are real simple, they are a small compact particle of a substance laying on the top area of your shingles. Whether it's an architectural shingle, or three tabs, granules will be on the top of them.

However, the only one we're not going to talk about is roll roofing. As mostly all house roofs use asphalt shingles these days and there is not a whole lot of roofs that are made out of roll roofing anymore, as shingles are very inexpensive. So we're going to stick to what your basic granules are made of on a shingle, which is crushed rock and tar, A polymer layer and adhesive. That's what your typical shingle is made from.

Granules are important for a bunch of different reasons and we're going to talk about exactly what makes them fall off. And again, what you need to know about when you have granule loss, but in a nutshell, that's what granules are on your roof shingles.


WHAT CAUSES GRANULE LOSS?

There are a lot of answers to this question, but we are going to go over some of the main points and some of the main causes of granule loss. As architectural shingles usually have less granule loss, than the three tab shingles, making them more of your higher end shingle type.

Some things that can cause granule loss is that they are just brand-new from being installed on your roof, which will result in some granules falling into your gutters, so no need to panic. The other is when a contractor is taking off the old roof shingles, as some granules will come off when handling, and sometimes the contractors don't do a very great job, cleaning up after all those granules from the old roofing system that has fallen and adding to the new roofing system just installed will release some granules on top of that. Other reasons why you are getting granule loss, is because of a poorly ventilated roofing system and can lead to blistering of the shingles in areas that have a lot of hot spots. What often happens is that your shingles are actually going to heat up so much, that blister spots will grow and pop, as they are made out of tar, and when they pop they will release granules due to the expansion.

Then lastly the weather, as when it rains or the wind blows, it's going to push or separate those granules from the shingles, which you are probably going to find them laying in your gutters, then at the bottom of your downspouts, resulting in your shingles just looking really bad, faded, cracked or spotted. If you see spots on them, this means you are going to start seeing the fiberglass in the shingles. And that's one issue that can cause your roof covering to age really quickly and not lasting nearly as long as it's supposed too. Another thing, that I'm sure have seen is hail storms. Hail storms can also cause a ton of granule loss. What happens, is that these large hailstones will fall and hit the shingles causing your granules to come off and you're going to be left with the dark spot. It's really hard. Sometimes you can see the difference between a hail head and a blister, but a train home inspector will be able to tell the difference.

If you have a heavy rain, wind storms, hail storm and quick temperature fluctuating, it can cause granules to fall, and it is always best to go check your downspouts, because I guarantee you that you're going to see a bunch of granules coming out of your downspout from the storm. Now, if you live in an area like I do in Nova Scotia, we just get a variety of storms types through out the year. The weather obviously has a lot to do with that granule loss. But lets not forget, if you just have a really, really, really have low, quality type shingles, because it was cheaper and your roofing contractor tells you, it's cheap and its good to use. It will be one of the reasons you have a lot of granular loss. So, in the end, cutting cost and not getting your roofing shingles from a good manufacture the main, plus the weather can causes granule loss.


WHY IS IT IMPORTANT TO UNDERSTAND WHAT GRANULE LOSS IS?

A lot of home owners and buyers we speak too, assume it is caused by hail or its not a big concern from when looking upon the roof from the ground. The segment here is that both you and your home inspector need to know the difference between a hail hit and a blister.

Example: We would go out. We would set up the ladder or use an aerial drone and we would look at these spots and we would think, oh, these spots are hail right? That's what it looks like even from the ground to because it's really hard to tell the difference between the two and we would get up there and sure enough, it would be blisters most of the time, resulting in you having a roofing system that has a large a mouth of blisters.

Remember what causes blisters, as the shingles are made from tar and will need to be laid on a well ventilated roof to help with cooling, meaning It has soffits, vents or ridge venting, plus the proper amount of internal instillation.

 




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