of is inspected prior to the commencement of the job. Remember, most pressure wash machines used in roof cleaning use a minimum of 4 GPM and as much as 10 GPM!. So it's easy to understand why knowledge oRoof cleaning of asphalt shingle roofs are a fairly new niche market that many pressure washing companies have started to notice. The process of cleaning asphalt shingle roofs is fairly simple if you educate yourself on how roofs are installed, possible problems and situations to avoid, and what type of stains you need to remove. Most pressure washing companies that begin roof cleaning find that there is a considerable amount of technique and skill required when cleaning roofs. Any contractor that performs roof cleaning should be aware of how roofs are installed. Failure to understand roof installation methods can cause thousands of dollars in damages by a pressure washing contractor. It's imperative that the pressure wash contractor use extremely low pressure to avoid damaging the shingles and that the roof is inspected prior to the commencement of the job. Remember, most pressure wash machines used in roof cleaning use a minimum of 4 GPM and as much as 10 GPM!. So it's easy to understand why knowledge oate yourself on how roofs are installed, possible problems and situations to avoid, and what type of stains you need to remove. Most pressure washing companies that begin roof cleaning find that there is a considerable amount of technique and skill required when cleaning roofs. Any contractor that performs roof cleaning should be aware of how roofs are installed. Failure to understand roof installation methods can cause thousands of dollars in damages by a pressure washing contractor. It's imperative that the pressure wash contractor use extremely low pressure to avoid damaging the shingles and that the roof is inspected prior to the commencement of the job. Remember, most pressure wash machines used in roof cleaning use a minimum of 4 GPM and as much as 10 GPM!. So it's easy to understand why knowledge oa considerable amount of technique and skill required when cleaning roofs. Any contractor that performs roof cleaning should be aware of how roofs are installed. Failure to understand roof installation methods can cause thousands of dollars in damages by a pressure washing contractor. It's imperative that the pressure wash contractor use extremely low pressure to avoid damaging the shingles and that the roof is inspected prior to the commencement of the job. Remember, most pressure wash machines used in roof cleaning use a minimum of 4 GPM and as much as 10 GPM!. So it's easy to understand why knowledge ohods can cause thousands of dollars in damages by a pressure washing contractor. It's imperative that the pressure wash contractor use extremely low pressure to avoid damaging the shingles and that the roof is inspected prior to the commencement of the job. Remember, most pressure wash machines used in roof cleaning use a minimum of 4 GPM and as much as 10 GPM!. So it's easy to understand why knowledge oof is inspected prior to the commencement of the job. Remember, most pressure wash machines used in roof cleaning use a minimum of 4 GPM and as much as 10 GPM!. So it's easy to understand why knowledge of roofing installation and a roof inspection is necessary when you consider the amount of water that could enter the structure during roof cleaning.

Most roofing materials are installed over a layer of felt paper and in some cases a rubber-like ice guard material. The first layer of shingles is called the starter course and is installed at the lowest point on the roof, upside down. This allows a solid base for water to run over without leaking down into the rafters and plywood between the shingles key ways. Once this layer is installed another shingle is place directly on top of it, and the rest of the roofing is placed in a similar fashion up the roof line. The reason shingles are installed in this manner is to allow the water to run over one shingle onto the next until it enters the gutter system.