The deal is its BS. Call any roofing manufacturer and ask them what they think of a few thousand psi on a roof.
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Many people are also uneducated on basic roofing principals. Never use a surface cleaner on a roof. Chemicals is the way to go.
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Mosmatic makes an accessory for it. Itâs not for every roof type obviously and you should reduce pressure accordingly, but just blanket stating that you shouldnât ever do it is wrong. Itâs necessary sometimes if the roof is in terrible condition.
Whoâs liable for a water damaged home you or mosmatic?
Why would there be water damage? Itâs a procedure thatâs done all the time especially on tile roofs where I am. Youâre not blasting with 200+bar.
water ingestion
I have used the mosmatic roof cleaner countless times to prepare for painting and have never had any issues with water ingress. Not saying it could never happen but itâs never happened for me.
Cleaning a roof with chemicals to make it look better/clean is often very different from paint preparation.
Experience indicates what can be done
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I was thinking the same thing. Making a roof look good is a different story to removing all contaminants off the roof for painting.
I think most roof painters are forced to use a surface cleaner on a roof due to not being able to finish there work in months to come until the growth had fallen off. You could almost call it a shortcut. When I first started in this industry I was doing roofs with bleach and 1500 psi due to wanting instant results, until I flooded the roof of an older house due to being old, long story short I was $12500 thousand out of pocket and uninsured as well, moral of the story isnât to have insurance (witch is a must) but to not risk flooding a house with high pressure in the first place. Roofs are rarely inspected or cared about by the general public itâs just a matter of time before one gets flooded, you just canât turn down every old looking house.
What contaminants on a roof are you talking about?. 95% of dirty roofs are organic growth the rest will come off with a rinse even loose sand grit from tiles after itâs had a good dose of surfactant in its presents.
Itâs more like a necessity, wash it then paint it the next day before it is covered in dust and other debris.
Some painters take a âshortcutâ and just blow the roof off and donât wash at all.
Iâm sure you have a great technique that produces excellent results having experience and common sense. Same canât be said for everyone. New guys should not be let loose on a customers roof with high pressure.
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Wait Iâm confused @jcfin you havenât done any roofs yet but you are giving advice on how to do them. That bad form my friend
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I totally agree, I reckon new guys shouldnât even be ON a customerâs roof without receiving prior training from an experienced opererator- too much that can go wrong from the get go.
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Itâs concrete tile, a lot of people use surface cleaner on. No different than a drive, lol. Mosmatic makes one just for those roofs
Itâs not tile damage Iâm referring to itâs pressurised water underneath them where they over lap. It would be silly to assume every single roof is water tight, roofers make plenty of money and itâs not for cosmetic reasons.
True, I donât do roofs. However, Iâve seen one pressure cleaning and there are multiple local companies dedicated to it, so I know for a fact somebody does it without damaging anything.
No you know for a fact that people are doing it that way. You have no idea if damage is being done because you dont understand the process. Iâm not trying to me a â â â â â â â just friendly advice. Dont give advice on something you dont understand
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