Power Washing and Roof Cleaning Forum

Dave O · Retired Member

Algae Inhibitor for Vermont Slate Roofing Tiles

Liberty SoftWash · PWS Vender

I would just clean it.

Dave O · Retired Member

I consulted with the Vermont Slate company and the individual I spoke too could not recommend any type of inhibitor...just routine cleaning.

Jeff Wible · Approved Exterior Cleaner

Years ago we discussed adding copper sulfate to a sealer and apply it to the roof,..whether it be slate, asphalt shingles,,..etc,.. The sealer would act as a time release for the copper sulfate. No ratios or such were ever discussed,..but I think it does have merit if worked through.

I agree though,..just clean it!

Jeff

Dave O · Retired Member

At this time I'm going to propose to the HO to just clean the roof without any potential inhibitor. His slate roof is too large to experiment with.

Michael Hickey · Approved Exterior Cleaner

Dave O why not offer the home owner a maintenance cleaning contract at a greatly reduced price. You could pencil it in for every couple of years or at the first signs of moss, lichen or discolouration of the roof. At the end of the day there is no way to prevent any of these funguses returning.