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I looked at a stone covered metal roof today and when I pulled up in the driveway I was sure it was a Tile roof but when i got up close , sure enough it was stone covered metal, now what is the secret to cleaning these types , is it the same  as ashfault where you just use the same mix and spray it on and walk away, or do you weaken the mix , spray on and rinse?

never heard or seen that type of roof. 

garyw wrote:

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A slighjty weaker roof mix works well. I've done 2 of them and nothing is different. I wouln't recommend walking them though.

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I am using 65 gallon tank, would you say 10 gallons sh 55 gallons water and 32 oz green wash? I'm just thinking I would apply it from the ladder and rinse it off with a hose 15 minutes later, what do you think?

Roof Cleaning By A&E wrote:

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I would not rinse.

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 Neither would I. We didn't on the ones we did and they turned out great