San Antonio Roofing: Article About Cleaning Stains On A Roof
Asphalt shingles located in areas of roof that are shaded from the sun often develop spots or streaks. Many people think that these black areas are mold, but they are actually caused by a type of algae attracted to the moisture that collects on roofs. The streaks of black algae can be unattractive to look at. The algae drink rainwater and actually feed on the limestone parts of the shingles.
The best way to keep asphalt shingles free of this black algae is to simply buy shingles from a San Antonio roofing company that are treated with algicide. This will keep the algae away for roughly 10 years, and the shingles usually come with a 10 year warranty. However, most houses are more than 10 years old. This means that the algicide has worn off, and the algae now have free access to the house's roof.
After the algae have eaten away at a roof for long enough, they begin to damage the asphalt itself. Once they have started damaging the asphalt, it doesn't take long for them to push it past the point of no repair. This means a new roof, which is very costly. It is a very good idea to clean a roof as soon as algae are spotted.
Depending on the season, professional roof cleaners can perform a full roof cleaning in less than a day.
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However, even if it is only necessary for them to clean part of the roof, they will have to come back every two or three years, so things can get costly for homeowners. Thankfully, it is possible for a homeowner to maintain their own roof between professional cleanings if they have the right equipment. It is not too difficult a job, but the homeowner must have the proper knowledge.
The items needed for this project include a harness, a garden sprayer, a hose and a roof cleaning compound. A pressure washer is not needed unless the staining is severe, in which case it is time to call in the professionals.
It is important to choose the right weather conditions for the job. An overcast day with no wind is best. Nearby plants must be covered up and furniture set aside as overspray is inevitable. Then, it's time to get up on the roof and spray all of the black areas thoroughly. A slow and detail oriented job ensures much better results. Homeowners should be sure to rinse off plants after the entire process is complete to avoid accidentally damaging them with the roof cleaner.