The objectives of maintaining a cedar roof are threefold.
Stain cedar shake roof.
Staining is just one method of treatment and not a very good one.
Paint vs stain best stains seals and protects wood shingles leaving no paint mil to chip crack or peel.
Clean the roof preserve the wood and prevent moss.
Twp 200 series stain is a deep penetrating oil stain that contains more than 94 solids extending the life of exterior wood surfaces like wood shakes and wood shingles.
Those extractives can even bleed through many types of paint.
Cedar roofs treatment is good but staining not so good.
According to studies a cedar roof can last anywhere from 30 to 50 years if it is well taken care of.
Best stains covers preserves better these best stains are also are easy to apply by spray method.
Oil or water based stains make an ideal stain for your cedar shingles as long as they don t have a high solid particulate nature.
The maintenance for a cedar roof involves cleaning the wood to remove gray wood fibers and contaminants such as mold mildew algae and moss.
A cedar roof wood stain can then be applied to provide weather protection.
Sealing of cedar redwood roofs should never be done as this will keep the shakes from getting the air they need to stay dry.
Cedar shingles contain extractives that bleed to the surface when the wood becomes wet and then darken as the wood dries.
In regards to staining and sealing a cedar redwood roof staining is fine for curb appeal but adds no real value to preserving the roof itself.
The best twp stain for shakes and shingles is the 200 series wood stain.
The best way to prevent extractive bleed is to select a paint or stain that forms a seal over the cedar.