Stock pressure washing nozzles put out a very sharp stream of pressure if you get the wand to close to the cedar you will leave a scar to much pressure is also bad often dislodging or cracking the shingles or shakes.
Pressure wash cedar shake roof.
Apply with garden style pump sprayer or other pump spray system.
The other downfall with simply using water is it does not kill the organism living on the roof.
Cedar shake siding will grow algae and mold if it s not cleaned once in a while.
Avoid pressure washing your cedar roof.
Start with a small amount of chlorine and add to the mixture as needed until your roof is clean.
Once dry seal the newly cleaned surface with wash safe cedar seal to keep surface protected.
Pressure washing should only be done by a trained professional in cases of extreme moss and debris build up.
Use a weak stream of water or a soft bristle brush to apply the mixture and then rinse away with water from a hose.
Much like a wooden deck you can use detergents and a pressure washer to blast the grime away and reveal the beautiful cedar color within.
Temporary short lived results can be had using a pressure washer however but we believe the risks of falling on the slippery cedar and splitting the cedar shakes far outweighs the short lived clean.
Algae and mold will cause deterioration and discoloration to your cedar siding.
Avoid products like bleach and ammonia as they may discolor or prematurely weather cedar shakes.
Cedar wash cleaning application.
When your cedar roof needs cleaning simply mix together water and either chlorine or oxygen bleach.
Slate shingles are a beautiful material for roofing but are delicate and costly to replace.