markhop

I am doing a 3 story 100 yr old brick house wash. All looks good except for black stains, about 2 feet wide and the full height of the house. These stains are only where the gutters (not aluminum) were at. High pressure directly on it does nothing, oxalic acid does nothing. Has anyone ran into this b4? How did you remove this? I think it is caused by the metal depositing on the brick over the years. Brick is very porous.

thanks Don. I will.

I would like to know how to clean roofs. I have done a few houses and have decided to make a business out of it. I would like to include roofs in my services. How do I apply chem. , should I use x-jet, what is down streaming, what GPM is minimum for rinsing, how do I price a high pitch vs. a low pitch roof, do I rinse with a pitch witch or what???? Please help! Where is a good place to get waterproof clothes? Any other info you may think I can benefit from I would appreciate it. you can email me at: markandteriplus4@wmconnect.com