Are you trying to decide if you should get a new roof because it is covered in black streaks? You are likely seeing algae, which means that it is possible that the asphalt shingles are damaged. It is possible that the shingles will need to be cleaned, repaired, or replaced altogether. Take a look at this article for more insight about dealing with algae on an asphalt shingle roof.
How Does Algae Damage an Asphalt Shingle Roof?
Basically, algae can damage an asphalt shingle roof by consuming the limestone. The spores can consume the limestone until the shingles become thin and develop holes. The longer algae spores have been on your roof, the higher the chance that there is a lot of damage.
What Kind of Repairs Might Be Necessary?
If repairs are necessary, a roofer might only need to remove damaged asphalt shingles. The shingles that have begun to deteriorate from algae exposure can simply be replaced. However, it is possible that a large quantity of shingles will have to be replaced if the black streaks cover a large area of your roof.
When Does a Roof with Algae Only Need to Be Cleaned?
A roofer can walk around your roof and determine if it only needs to be cleaned. He or she will make sure algae spores are sitting on the surface of the shingles, and have not begun consuming limestone. Your roof can be power washed to get rid of the algae.
What Are Signs That the Roof Should Be Replaced?
If algae spores have damaged your roof beyond deteriorating the shingles, it is likely that a replacement will be necessary. For instance, once the shingles develop holes, it leads to the roof deck being exposed to outside elements like ultraviolet radiation and rain. The roof deck can then begin to deteriorate and put the inside of your house at risk for getting damaged. A prompt replacement roof is needed when the deck is in bad shape.
How Much Does a New Asphalt Shingle Roof Cost?
Getting your roof reconstructed is estimated to cost up to $4 per square foot. The width of shingles being installed and slope of your roof will have an effect on the overall price. Get in touch with a contractor that specializes in re-roof jobs so he or she can perform a thorough inspection and determine if you need a new asphalt shingle roof.