Is There Limestone Filler In Roof Shingles

Unless they are not using fiberglass matting.

Is there limestone filler in roof shingles.

Algae feed on the limestone filler used to give the shingles weight. Though often attributed to an accumulation of dirt defective shingles mold or mildew the most common culprit is actually a blue green algae known as gloeocapsa magma that is spread by airborne spores. Algae feed on limestone filler contained in asphalt roof shingles. If you live in a humid area of the country you ve probably seen unsightly dark streaks on asphalt shingle roofs.

Unfortunately the limestone filler in most roofing shingles provides nutrients to the algae spores. Feeding on the inorganic materials of your roof s materials they ll continue to spread and darken until you get rid of them. Well many shingles contain a powdered limestone filler that acts as a food source for algae causing it to survive relatively easily on the top of your roof. As a filler limestone is very cheap plentiful and works rather well.

Roof algae is a living thing and it s feeding off of your shingles actually it s feeding off of a limestone filler commonly used in shingle production. Its used as a filler in order to keep the shingle flexible and also to help the fiberglass matting absorb the asphalt. All companies use limestone they have too. Over time as the filler is eaten away the granules protecting the surface of the shingle lose their hold and begin to wash off.

As a result of this loss of shingle mass the roof loses the ability to reflect heat rays. There s more algae on roofs today because manufacturers use crushed limestone within the shingle as a filler so they don t have to use as much asphalt. The inorganic materials found in your roof will allow the algae to survive spread and darken. Here s the deal with limestone.

If it s not taken care of it will take years off of the life of your roofing. The third ingredient nutrients is gained when the spores begin to eat the limestone filler in your roof s shingles. The sun and the humidity on your roof give it the first two. Most cases of roof algae or fungus start with a single spore finding its way to your home.