James, once a year we clean the exterior of huge well known energy company’s head office. (I won’t name as I don’t fancy competition knowing what we clean
)
It’s got this exact type of vinyl siding.
We always use a 2% hypo mix with the petrol soft wash machine, then a sniper nozzle with the pressure washer to rinse off.
When we used to do it via poles and scrubbing, it took 2 and half days (3 of us)
When we changed to softwashing it, it now takes 7 hours.
That’s the difference!
I think next time you do something similar, or this job again, it’s worth trying a soft wash.
You can agitate where neeeds be with a brush, but shouldn’t need to.
All these methods work, but I can’t stress enough how time saving and effective I’ve personally found softwashing them.
The energy company are always really happy, and the shine after the softwash is pretty darn spectacular
All the best mate, you still did a great job 👍🏼