PW McCallum Roofing

roofing contractor located in beautiful Shawnigan Lake BC  


Moss should be killed as soon as it starts, its rapid growth its roots brake the water prof surface of the shingle, this allows water to enter into the shingle. We don't recommend removing the moss with force as this could result in a roof leak. Prevention is always the best method, moss is very subject to electrolysis. Like the hull of a boat, anything that changes the surface energy will kill moss, zinc stripping helps but is not a silver bullet and may not work at all the time . Treating the roof is the best method, zinc sulphate is the most effective and kills moss on contact, but the environmental consequence are huge, it can also eat the bottoms out of aluminium gutters. Laundry soap works but the sulphates can have a environmental impact. Both methods work, so if your going to use them please use moderation.                     

Posted 379 weeks ago

2116 Renfrew Rd Shawnigan Lake B.C. V0R 2W1

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246 2 St Duncan B.C. V9L 1R6

309 Benhomer Drive Colwood B.C. V9C 2C7

246 2 St Duncan B.C. V9L 1R6