Our roof cleaning company services Montgomery County Maryland, Frederick and Prince Georges County Maryland. Finding a company to clean your roof that is trained to properly clean roofs can be tough, most power washing companies use high pressure cleaning methods to blast off mold, lichen and other debris along with part of your roofing!
Since 1989 we have offered roof washing, house washing and deck cleaning services to over 60,000 properties in Maryland. All of our roof cleaning is performed by trained technicians that inspect your roof for common problems and check to make sure your roof can be safely cleaned using our low pressure roof cleaning system.
Training and education is important when cleaning a roof, the process of cleaning asphalt shingle roofs itself is fairly simple if you know how roofs are installed, and can identify possible roof leaks and what type of stains you need to remove.
Most power washing companies that consider washing roofs find that there is a considerable amount of technique and skill when that’s needed to do it correctly. Any contractor that performs roof cleaning should be aware of roofs are installed, failure to understand roof installation methods can cause thousands of dollars in damages from a pressure washing contractor.
It is important that the company 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 washers use a minimum of 4 GPM and as much as 10 GPM! So it is 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 cleaning.
Before hiring a company to clean your roof make sure they understand the basics of roof installation. It is also equally important that your roof cleaner know the other structures on the roof and their function to avoid causing leaks around them.
Note: This is extremely important because some companies in Rockville Maryland have caused some damages to homes in the area over the years.
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.
If your roof cleaner can identify the common fixtures on a roof the next step is to identify what they will be cleaning from the surface. The most common reason for cleaning asphalt shingle roofs is to remove a fungus growth called Gloeocapsa Magma. This particular type of algae is air-born and will collect on any type of roof. In most cases the owner of the property will not notice the algae growth until it begins to take over large sections of the roof. This algae usually forms dark brown or black stains on the roofing and it thrives in mostly warm humid areas.
A company with the appropriate roof cleaners, equipment and experience can safely and effectively clean roofs to remove black streaks, mold and mildew from roofs. The problem is, most companies in Maryland do not have the proper training or knowledge to do the job correctly, they use high pressure cleaning methods or chemicals without any training or knowledge of what they are doing and kill plants, cause explosions and destroy roofs! Taking the time to learn the proper methods and purchase the right roof cleaning equipment is the problem.
We have been cleaning roofing in Maryland for over 30 years, we only use safe roof cleaners designed and manufactured by our vendors, and all of our technicians have been properly trained to perform the job. Our president Henry Bockman helped to design and write the training classes and material for classes taught by the Power Washers of North America many years ago, and is still an active instructor in the industry.
Regardless of which company you use check with the manufacturer of the roof to make sure the roof cleaners used meet their guidelines. Some manufacturers will void the warranty on the shingles if their guidelines are not met. The one thing all roofing manufacturers agree on is that the use of high pressure should NEVER be used when cleaning. Some specifications set the safe pressure range at 400 PSI or less, but the best rule of thumb to use is the least amount of pressure and the mildest cleaner possible to achieve the desired results. All of the roof cleaners we use have been proven safe and effective for cleaning roofs and we generally use less than 100 PSI to clean any type of roofing. That is about the same amount of pressure you would get if you covered your hose with your thumb!
If you are considering hiring a roof cleaning company, I would highly recommend that you ask if they have taken a class by Sun Brite Supply or from the Power Washers of North America. These informative courses will give them an in depth look at proper techniques, chemical processes, and roof construction needed to clean roofs.