Quote:
Originally Posted by DAFF
Myself I like to wash those chemicially chalanged jobs first thing in the morning or during a wet and dreary day. Seems silly to the customer but after you convince them of how the sun and heat works against you and the finial product they seem to like the idea. Plus it open up the work week for the days it is not raining. Best of all you save $$ and time not fighting the dry/wet game and let the chemicial do its work!!
DAFF
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That's funny I've always thought cleaning roofs works better on dry hot days. Shingles don't absorb as well on cool cloudy days, and I'm not big on walking on a wet roof more than I have too. That's just me though.
The problem is more than likely too weak of mix or old chlorine. That stuff has to be fresher than fresh to work good. It needs to be hitting the roof at about 4-6% to be effective.