Has anybody else watched this video?
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This is not my video I just found it on youtube.
What is the evidence that the roof was cleaned with chlorine? I don’t believe it for a minute.
Seen that video a few times. Looks like a very old roof. I think I heard somewhere they spray full strength SH on it a couple times to get it to look like that.
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Well I guess the manufacturer should be sued for suggesting using bleach to remove black gm stains. I also have a video of a dying out of shape fat guy that warns of the effects of eating too much salad.
Full strength chlorine is not recommended. There is no proof of the validity of this video and should be removed or at least break the link. Alot of peoples livelyhoods are effected by morons like this.
Sorry guys, didn’t mean to cause any problems with the video. It just seemed like this guy is a roofer and would rather tell the customer the effects of chlorine and that they should replace the roof instead of hiring someone to clean it. More business for him instead of hiring roof cleaners. I will remove/edit my post from here if requested…
Its requested by me, whatever its worth. The only substance ever suggested to treat roof stains is chlorine bleach. The manufacturer warns of putting anything else other than that. As described in this pdf bulletin by the maker of asphault shingles: http://www.asphaltroofing.org/pdf/tb_227.pdf
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sorry double post so i deleted the text.
I just posted this to a similar question over at SWC,
[COLOR=“blue”]paroofguy wrote:
I have a problem that I need help on. We are starting to reroof my mother’s house in Oklahoma with shingles that had been purchased 2 years ago and they had gotten wet in the bundles due to inadequate tarping of the shingles. When we opened the packages, I have mold and algae on the fronts and evidence of it on the backs. My thought is to pre-treat both sides prior to installing the shingles with SH roof mix. I will save one question-- we do not have the option to buy more shingles… Doug Rucker suggested the board as some roofers are on here. Any help will be appreciated tonight, as the roof is underway as we speak.
I also would appreciate input on what strength to spray the shingles with.[/COLOR]
Steve here is what I know and have experienced over the last 20 plus years.
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In 20 years and over 50,000 roofs I have never seen any damage caused to shingle roofs from bleach based cleaners. I have seen damage from pressure washers and even some companies that used acid on roofs. Never by bleach.
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Though I had never seen any damage doesnt mean it doesnt exist so we went another step further. Back in 1995 Elk Shingles took two shingles off the line new. One they soaked in a bleach and water solution with my duck sauce in it, with no rinsing. The other they left untreated new off the line. They then placed both shingles in a testing oven for 30 days at 300 degrees at 100% humidity. After 30 days they took the shingles and inspected them for any degragation. They found that the shingle treated with bleach and water with duck sauce had no more wear than the shingle that was left untreated. This test was to simulate 30 years of shingle life. Monier / Lifetile ran the same test on tiles from their plant as well.
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The asphalt strip on the back is designed to seal the shingles one to another as the roof heats up in the summer. The tar strips get hot, melt and bond the shingles to one another so that wind can not get up under them during a wind storm. This strip is not normally exposed during a cleaning. Only the top of the shingles get treated because only the top of the shingles are exposed. Therefore other than the test in 1995 I have not seen these strips exposed to bleach. However this is what I do know. To break down this tar strip you would need straight bleach and many treatments of it. Remember this strip is meant to heat up, melt and bond with the top of the shingle under it. Even if you hurt the surface of this strip there would be fresh tar beneath.
My reccomendation would be to treat the shingles top and bottom. Rinse them theroughly top and bottom with a garden hose and allow to dry out on the driveway before instalation.
I do not think you will have ANY problems at all with the cleaning process effecting the shingle.
Hope this helps,
AC
Here is my experiences with Chlorine on Roof Cleaning In Tampa
Back nearly 20 years ago when I started cleaning roofs, I allowed a roof cleaner from South Florida to convince me it was better and faster to use Straight Chlorine undiluted, and apply it with almost a mist nozzle, for less run off.
There was little to no competition back then, and I cleaned nearly a whole block of customers this way. Well, I got called back years later to re clean these roofs, and every one of them had severe granule loss. I mean granule loss as bad, maybe even worse, as pressure washing causes.
The Duck Sauce AC used at Mallard Systems, and My own Apple Sauce, are far different from pure undiluted swimming pool chlorine.
I have never seen any shingle damage from diluted roof cleaning solutions containing chlorine in many thousands of roof I have personally cleaned, or my guys have done.
We guarantee in writing that our roof cleaning chemicals will not harm a roof, and in Sue Happy Tampa, we have never had even a claim for damage caused by Chlorine to any roof.
Recently purchased QSE 3000 to remove the black mold on my roof. It worked “ok” according to the guy who did it, so he doused the roof with full strength bleach which removed the rest of the mold. I wonder if this will hurt my roof? He did it without my consent.
Recently purchased QSE 3000 to remove the black mold on my roof. It worked “ok” according to the guy who did it, so he doused the roof with full strength bleach which removed the rest of the mold. I wonder if this will hurt my roof? He did it without my consent.
