How to remove these stains

tstex · Apr 16, 2023

Ok, will do. I’m going to have to wait about 5-6 hrs for the sun. I have 12.5% bleach, which is twice as much as Std 6-6.5% and 60% stronger than the 8-8.25%. I might just cut to chase and do 50-50% bleach to water after sun subsides. I always wet down the surfaces below and or cover w huge area rug padding…Thanks again and I’ll post back later this evening

Alan46 · Apr 16, 2023

tstex said:
Ok, will do. I’m going to have to wait about 5-6 hrs for the sun. I have 12.5% bleach, which is twice as much as Std 6-6.5% and 60% stronger than the 8-8.25%. I might just cut to chase and do 50-50% bleach to water after sun subsides. I always wet down the surfaces below and or cover w huge area rug padding…Thanks again and I’ll post back later this evening

50-50 is ok! Like I said if it doesn’t work on a small area without rubbing it’s not mildew. From the looks of it in the pictures, I don’t think it’s mildew!

Alan46 · Apr 16, 2023

I just looked at the pictures again, I’m thinking if it’s not mildew, call the roofing company and explain the situation, probably not the first time they have heard that problem!
Good luck!

tstex · Apr 16, 2023

Alan46 said:
I just looked at the pictures again, I’m thinking if it’s not mildew, call the roofing company and explain the situation, probably not the first time they have heard that problem!
Good luck!

I have already contacted GAF last Tuesday and this is what they sent me...