Why do people pressure wash their roofs? Roofing manufacturers say specifically "DO NOT PRESSURE WASH"?

Quotes from roofing manufacturers, along with the direct links to those manufacturers, where I got the quotes from are here, on the "manufacturer Specifics" part of my website.

http://www.bergmanpressurewashing.com/Manufacturer...

Here's a cut from that:

HERE ARE THE FACTS FROM THE MANUFACTURERS ETC:

Below are the only manufacturer suggested chemicals I have been able to find on any roofing manufacturer website, bulletin, etc. Some *alternative chemical users* claim "Approved" but do not supply manufacturer links to prove it.

The below info and links, prove how those who manufacture and warranty your roofing actually approve of cleaning them!

__________________________________________________________________

From GAF Roofing Manufacturers about black algae removal:

http://www.gaf.com/Documents/Algae_Staining_on_Shi...

Below is a partial "cut and paste" excerpt from the above link: GAF Roofing Manufacturers, on how to clean a roof:

"If a new roof is not an option, GAF recommends cleaning the roof with a special mixture. That mixture is: 4 gallons of water, 1 gallon of bleach and 1 cup of TSP" "What NOT To Do! Do not power wash the shingles to clean the shingles. Some roof cleaning companies offer this service. However, it is not recommended."

From ARMA roofing manufacturers Association-how to clean roofing.

http://www.asphaltroofing.org/pdf/tb_217.pdf

Below is a partial excerpt cut and pasted below from ARMA:

Algae discolorations to remove from roofing surfaces, applying a solution of chlorine bleach, trisodium phosphate, {TSP}and water. Solutions for these ingredients depend on the amount of discoloration. Solutions range to one cup TSP and 2.5 gallons each of bleach and water. First, gently disperse this solution on the roofing surface. Avoid scrubbing the surface, as this friction may loosen and remove granules. Caution! High pressure washing systems for algae removal should not be used.

Owens Corning Roofing Manufacturers say

the same thing:

"USE CHLORINE and TSP" "DO NOT USE A PRESSURE WASHER"

Corning info in link below.

http://webapps.easy2.com/cm2/flash/generic_index.a...

This one, from the ARMA, says not to allow anyone to apply any

*after coating*

such as Algae-cides, Fungicides, zinc, copper, or other treatments - not anything!

http://www.asphaltroofing.org/pdf/tb_227.pdf

SO, ROOFING MANUFACTURERS SPECIFY ONE PRODUCT TO CLEAN WITH - CHLORINE BLEACH. CHLORINE BLEACH.

THEY SAY SPECIFICALLY NOT TO APPLY ANY COATINGS AT ALL AFTER CLEANING.

NOW YOU HAVE VERIFIABLE FACTS WITH LINKS TO MAKE DECISIONS WITH. NOT JUST SALES TALKS!.

5 Answers

Relevance
  • 9 years ago
    Favorite Answer

    Stupidity,

    or lack of knowledge,

    some one said to do it,

    what to keep up with the jones,es

    Source(s): old timer
  • 4 years ago

    My husbands brother had a similar injury, he was 25 at the time. He fell down the stairs had a bleed in the brain, they removed half of his skull to allow for pressure. He was in icu for 3 weeks before he woke up and was extremely confused and angry for another 2 weeks in high dependency. He came home a month after that still with his skull piece missing. Two years on he has just had a titanium piece put back where they removed the skull. He still has fits but only occasionally now ( in the beginning daily) He is almost as normal as you can get now a little short term memory loss. Bear in mind that head injuries are all different and your cousin has age and fitness on his side.... This time now is the most frustrating as you want answers but can't have any, it is just a hour by hour thing. Good luck to your cousin and all your family, i'll think of you all

  • UNCOLA
    Lv 6
    9 years ago

    You do understand the format of this forum. You ask questions and get answers, NOT RANTS

  • papaw
    Lv 7
    9 years ago

    They do it by ignorance and choice and failure to know the mfg. standards. Their problem; their worry; not yours!

    Papaw

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  • Anonymous
    9 years ago

    THEY JUST HAVE NOTHING BETTER TO DO ..a BIT LIKE ANSWERING QUESTIONS ON HERE REALLY.

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