New Air Pump Setup.
- Thread starter PeakOfPerfection
- Start date
PeakOfPerfection
New member
Got a during pic. The after pic is nowhere to be found.
Note what was hidden on the edge...a GUTTER! Worked too after we were done.
This is a more common level of moss we deal with...
PeakOfPerfection
New member
Yeah, ain't that the truth! Only thing is...as you know, customers will get the impression that there is no moss on the south side and inevitably ask if you can just spray that side of the roof (the answer is always No). Guaranteed if you see it on the North side, it is on the south. I've had guys bet me 1/2 the roof clewning fee that there was nothing there only to have them come out after spraying to point out the south side absolutely peppered with white moss on the shingle edges. Happens every time!
Rapid HotClean
New member
Yep, absolutely. It's always there but seems almost invisible to the untrained because the human eye is overwhelmed by what it sees on the north and east sides of the roof. That's why I go out and physically look at over 90% of the roofs we bid.
PeakOfPerfection
New member
Air to remove the tree debris, physical hand scooping of big branches and gutters. Heavy SH/Surfactant mix, high volume wash down....repeat. Far more work than the spray and leave GM work many are blessed with. Heavy moss also takes a LOT more mix volume. I have seen a 2000sq ft single story eat 100 gal of roof mix with virtually zero runoff.
PeakOfPerfection
New member
My experience here in Western Washington is...it depends. There are a lot of different species of moss and differing maturity levels. Some moss comes off easily...the big puffy balls or wet masses typically slide right off. But there are others that are more difficult. The stuff that grows strictly on the shingle edges tends to be a bit tougher. Then there are the weedy mosses. Ugh.
They are more akin to shrubs them moss and when that stuff moves in, we tell customers it may take six months or several repeat treatments for that stuff to come off. You can hit it with 12.5% and it won't turn white. You will kill it, but it won't look any different for a week or two when it finally turns brown then continues to hold on and laugh at rinse water. Fortunately, it is a very small percentage of what we see and that is an advanced species that takes a lot of years of roof neglect to establish. It DOES come off...but that stuff is hearty and puts roots in that are TOUGH. Most roofs we get 85% off on the visit. The rest is about 2 weeks to 3 months to safely release or a second rinse down or good solid series of thunderstorms.