Every year I get to watch one of my neighbors have their roof cleaned. I have posted in the past about the damage that can be done to roofs from pressure washing and that post had a video of the effect of pressure washing on the shingles.
This year I could hear the pressure washer again so I ran to the window to check it out.
This year’s cleaning was different.
The roof cleaning service was utilizing a supposedly better method of cleaning the roof. The process uses a stream of “air” instead of “water.”
As I watched the process it became clear that this method is absolutely no better than using water and might actually be worse.
As you watch the two videos, I will let you decide so that the next time you have your roof cleaned—you will pick a method different from either water pressure washing or air pressure cleaning.
As you can see in both videos, the shingles are no longer adhered and will be very vulnerable to wind damage in the future. All that flapping up and down is a little like leaves blowing down the street. In time it will be shingles blowing down the street. Several years have been taken off this roof by both methods of pressure cleaning.
Of course the TV advertising says nothing about this—perhaps the cleaning companies work for the roofing company.
My new roof does not have this issue.
Charles Buell, Real Estate Inspections in Seattle.
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WA State, Home Inspector Advisory Licensing Board