[Mike55]

How much pure water do you guys use on an average size glass connie roof?

Just done my first one using WFP.  Used custies tap water followed by a rinse with pure but wasn't impressed with the results.  I'm guessing I didn't use enough pure to rinse.  How much should you use?

[Steven01903]

I agree, All the conny roofs that I have done has been with normal water, Got away with it as they look a lot better than when I started.

I would run out of water if I just used purified water to clean the roof.

Next time I will rinse off with the water from the van.
I think that will be ok

[Smudger]

I have found that glass roof's are better just using pure, as they clean easily unlike polycarb where they seems to go
green/black and have loads of crud sticking to it.

the problem using tap water is letting it dry, you'll then have spots and watermarks which in turn
require scrubbing with pure.

 i use fan jets with high flow this tends to flood the roof panel and wash everything off. and the largish size conny roof uses no more than 100 ltrs.

Darran