I am asked all the time by my customers, "Can you clean roofs in the winter? How cold is too cold to clean?" My answer is always the same. Cleaning roofs in our local area, Pennsylvania, Delaware & Maryland is a wait and see approach in the winter and here is why:
Our roof cleaning process uses chemicals cleaners to kill the algae, moss and lichen that is growing on your roof. Once the temperature of those organisms starts to drop below 40% is becomes more difficult to ensure the killing effectiveness of our cleaners. Those organisms start to go into a hibernation mode of sorts when the temperatures drop into the freezing range for survival reasons. The become dormant so to speak and they won't effectively absorb the cleaners that we are applying to your roof. If they don't absorb the necessary amount of cleaners, you will not fully kill all of the algae spores that are growing on your shingles. The roof will still clean up, but the remaining dormant algae spores will come out of "hibernation" when the temperatures warm up and they will quickly begin the process of recontamination.
The rule that we go by during the winter is: Temperatures must not fall below freezing the night before the roof cleaning. As long as the temperatures are not below freezing the night before and the temperatures will reach 40 or more during the day, we will schedule the cleaning process. This way we know that the algae will absorb the proper amount of cleaner and will fully die on the roof giving you the longest lasting roof cleaning possible.
We are able to tell as soon as we spray the roof if the algae is at the proper temperature to effectively clean the roof. If for some reason the roof was not ready, we would stop the cleaning process and come back another day. It does us no good to clean your roof if the temperatures are not optimal. It will still look clean, but the algae will come back much sooner than it should. That would look bad for your company and chances are you would not have us come back to clean your roof or any other exterior cleaning you may need. We base our business on satisfied customers, repeat business and referrals. We want every customer to be completely satisfied will every aspect of our cleaning process. We want to earn your money and we are thankful for every customer that spends that hard earned money with our company.
Roof cleaning can certainly be done in the winter. This winter has been especially mild and we have worked much more than usual. If you are considering having your roof cleaned by a professional roof cleaning company, please give us a call for a free no obligation estimate.
The Roof Cleaners LLC
Non Pressure Roof & Exterior Cleaning
610-842-2104 or (888) WASH-360
theroofcleaners@gmail.com




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ALL ABOUT ROOF CLEANING by Dr. Victor H. Morgenroth | |
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Dr. Morgenroth is a Keys Gate resident who is a semi-retired, adjunct professor of neurology at UM. He was a principal administrator in the Environment Health and Safety Division of the Organization for Economic Cooperation and Development (OECD) for 20 years; prior to that I was a Group Leader in the Toxicology Division at the Center for Food Safety and Nutrition in the US Food and Drug Administration (FDA). Previously, he was on the faculty of several medical schools in neurology, pharmacology and psychiatry. | |
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Having your roof cleaned actually makes sense. I know most of us were slightly put out by receiving a roof cleaning notice from the Keys Gate Management Association. Although it read a little like an ultimatum and you probably wondered who the inspector of your roof was and what their qualifications were, it turns out that roof cleaning is not a bad idea at all. It isn’t just aesthetics. While people like to say that dirty roofs lower a property’s value and may make it hard to sell, the “dirt” on a roof actually shortens its life span and can even present a health hazard. Furthermore, the “dark stains” on a roof act as a sponge to absorb the sun's heat, which causes a rise in the temperature inside a home or building, creating higher air conditioning bills. The dirt isn’t just dust – It’s alive. Some of the black or very dark roof stains are caused by a resilient type of algae, Gloeocapsa magma (a type of blue-green algae commonly found in climates with warm, humid summers). The algae grow in standing water, as well as in our lakes and ponds. The algal spores are carried to our roofs from the water sources by the wind and birds, and then from roof to roof where it grows and feeds on the limestone filler in asphalt shingles and the real dirt on tile roofs maybe in some cases the tiles themselves. Worse still, as the algae grow, they retain water and foster the growth of other roof inhabitants. The black stains are also very likely to harbor a number of molds or fungi. Unlike algae the fungi on our roofs lacks chlorophyll. They are unable to manufacture food from raw materials. So, it must get nutrition from some form of organic matter. To thrive, these heterotrophs, who used to be called saprophytes, also require a warm, humid environment. Fungi normally begin their life cycle as an airborne spore that settles on roofs, especially the asphalt-shingle ones. The spores on the northern exposure of the roof stand a better chance of survival because that portion of the roof is the last part to dry after a rain or morning dew. This raises the humidity on the surface of the shingle, thus creating a perfect feeding and breeding ground. The tar used in roofing is fossilized, dead organic matter -- and an important food source for fungi. Asphalt, at the granule base, is normally consumed first. Once these granules dislodge, accelerated deterioration will occur. Ceramic granules represent the outer hard shell that protects against hail and other falling debris. Ceramic granules protect against damaging UV radiation and insulate the roof against extreme heat. So you can understand that their dislodgement by the growing fungal colonies can be detrimental to our roofs’ longevity. Surprisingly, the blue-green algae are also food for the fungi. While not all mold (fungi) and algae pose a health danger, some are harmful, especially for us older folks, younger children and people who suffer from asthma and respiratory problems. Their spores, which are on your roof, can get inside your home because they end up on the driveway and walkways from rain, and are easily tracked inside. They can even be drawn into our air conditioning systems and eventually populate our ducts. Different mold species can have varying health effects, but it is important to remember that any excessive mold growth needs to be taken care of, regardless of the species. Any excessive mold growth can lead to increased allergies, toxicity, and house/building structural problems. For those interested, this box describes some of the most common fungi likely to be found on our roofs and their possible health effects. While “sick building syndrome” has been talked about frequently in the media, it isn’t always reported that this syndrome is often caused by faulty or leaking roof assemblies that result in fungal infestations. It isn’t, as reported, always due to chemicals in carpeting.
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Pennsylvania, Maryland & Delaware Roof Cleaning customers ask all the time, "Why should I clean those streaks off of my roof?"
Any Certified Roof Cleaner can give them multiple reasons why it would benefit them to clean their roof. The Roof Cleaners of Chester County Pennsylvania are certified by The American Roof Cleaners Association and The Roof Cleaning Institute of America to informatively answer any questions about the harmful effects of black algae stains on your asphalt shingle roof.
The Roof Cleaners are certified to safely clean your roof using non pressure cleaning methods. Our methods and cleaning agents are the only ones approved by the Asphalt Roofing Manufacturers Association. They will not void any shingle warranties or cause any damage to your shingles. Any company that has to rinse or use pressure on your shingles (high or low pressure) is not using the proper roof cleaning solution.
We have multiple references available in your area (residential and commercial) and we will perform spot cleaning demonstrations if you are still skeptical about the effectiveness of our process.
Don't let gloeocapsa magma (black algae stains or streaks) damage your shingles or take away from the curb appeal of your home. It can be safely and effectively cleaned by a professional, certified roof cleaner.
Call The Roof Cleaners today! 610-842-2104 or visit our web site: www.cleanmyshingles.com