From what I’ve seen and read, when people have issues with colored vinyl, it isn’t from the bleach. It’s either:
- something else in their mix (like using dawn or some other soap instead of a professional surfactant)
- too much pressure, which will disturb the oxidation layer
- downright faulty siding (like some vinyl shake siding manufactured in the late 90’s - early 2000’s)
- allowing solution to dry, not rinsing thoroughly enough, or forcing solution behind the siding to weep out later
I clean colored vinyl homes with my standard mix and tips. I use soap tips for rinsing everything, and am careful not to use my shooter or 5° too close to the siding.
If I had my schedule booked out a year and was employing a bunch of guys who might not have as much sense as me, I would skip anything that could cause complications, just like IBS.
