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How to clean cedar shingles
Conduct a soft wash on your roof.
A soft wash, also known as a non-pressure wash, is where you take low pressure water and spray down a surface. This is important, as standard high pressure power washes might damage cedar shingles.
Available options: [+] Use a 12-volt pump system with pressure of about 60 psi. Scrub the shingles with a bristle brush.; [+] Cast iron can work, but a stick shamer can do that. Do not use soap when washing or steaming cedar shingles.; [+] Run your cloth under the water and wring it out until it is wet, but not dripping. Place a layer of pine straw under the cloth, then lightly wipe down the surface of the roof.; [+] Start the wash by turning on a low speed. Look under the gutters and under the lower roof.;
Use a 12-volt pump system with pressure of about 60 psi. Scrub the shingles with a bristle brush.