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vee_lan_cleef t1_jadh32e wrote

Reply to comment by Deadpressed in How do you know when to replace or fix a shed? by crabapplesteam

I have a pool shed in the northeast that gets heavy moss growth under trees, I pressure wash it yearly and it does not damage the shingles. The trick is to use a lower pressure electric one with a wide angle nozzle at a reasonable 8-12" distance from the surface. Also, you obviously need to direct the spray downwards towards the edge of the roof.

If you go using the high-pressure nozzle on a gas 3200 PSI pressure washer, then yeah you're going to fuck your shingles up.

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