sodium hydroxide on roofs ??????

[Russ Spence]

i love this stuff....... i have 600 feet of old 3/8 to start hanging with

 

[FCPWLLC]

FYI for anyone that has read anywhere that GAF will void the warranty of thier shingles if bleach is used. The only place you will see this statement is where a chem seller is trying to sell you thier "Roof Cleaner".

I just got off the phone with GAF. They sent to me thier technical Bullietin. Here is the link.

http://www.gaf.com/Content/Documents/22710.pdf

They only endorse the use of bleach-TSP and Rinsing.

 

[Apple Roof Cleaning]

A little sodium hydroxide can sometimes work wonders, on a Tile Roof ONLY.