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