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The Roof Cleaners of Chester County Pennsylvania 610-842-2104 wrote:

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Clyde, all you have to do is perform a google search on chemical resistance and many web sites will show up that will give you the answer to that question.

It took me just a few seconds to find the answer to your question. Here is the link to the site that I chose. http://www.coleparmer.com/techinfo/ChemComp.asp

When you get to the site, you need to choose "nylon" for the material and "sodium hypochlorite" for the chemical. Then hit submit. There are two choices for sodium hypochlorite. You can choose either one and it will give you the same chemical compatibility.

This site has chemical resistance/compatibility ratings for a lot of different compounds.

Brian

-- Edited by The Roof Cleaners of Chester County Pennsylvania 610-842-2104 on Friday 13th of November 2009 03:10:48 PM

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Poly rope would be better, poor SH resistance with Nylon, I would not trust my life to it.
The thicker, the better, and replace often, you only get one back !!

 

This is a good question and excelent responses. Thanks for the info guys. I was wondering this myself.
Another reason why this site is so great.

wow you use all that stuff my theroy is if its to steep to walk ill find a way to spray it some how. I would be worried a rope would snag a tile, but i will say it does get spooky on top of a 3 story house with no safety rope DONT LOOK DOWN!!!!!!  

 Personally, I started in the climbing arts many years ago up in the Pacific Northwest in the logging industry.

When I was a much younger man, heights did not faze me so I would put on boot spurs and climb30-50-80 or more feet up Douglas fir trees and limb them from the top down. A very challenging thing to do well.

After that, while doing some roofing and framing in the new home construction industry I had the opportunity to learn from the best in safety protection.

Later, I found work on high rises in Miami for a time and used harnesses on 15 to 45story bldg for floating tables for porch outriggers for the high rise condo boom of the late 90's between roof cleanings. 

I have used harnesses and standoffs, chicken ladders, ridge cap safety straps and MANY other methods. One thing I know, Poly rope doesn't securely hold for any safety carabiners or sliding rappelling rope locks to adhere to.

When in doubt. Use OSHA approved, fall protection kits that have a Fall Protection Kit in a BUCKET approach.

After securing the harness and getting the tie off point (the hardest thing to find on a roof since its usually the tallest point) the next additional piece of safety gear is COUGAR PAWS ( on steep DRY roofs, they work, period) and get several extra sets of replacement pads for the soles of the boots as they wear out.

My general rule of thumb is that, if you aren't properly trained to walk roofs...don't.

Get a roof cleaning pump that is STRONG enough to reach most ANY peak and have the nozzles to ZERO in on your target areas so you keep safe. 

If this approach doesn't work, rent an articulated man lift and stake all sprinklers and locate all pipes and in ground  utilities to avoid damage, then...go clean a roof