One of my customers wanted her atrium windows cleaned and they’re coming out ok but clearly not like brand new or a result I feel content with. My process is to water fed pole them and I even took a little white pad and it’s not really even removing the thick layer of grime that’s built up. It’s in a wooded area so a lot of grimes been building up on them since last year. I did this job last year and I guess the result was satisfactory for her since she called me again. There’s a lot of like algae / organic stuff that’s just heavily built up on the top and im wondering maybe If downstreaming would help? lol. I’m just gonna do a regular cleaning and the way it comes out is how it comes out but my question is does anyone have any idea or experience on how to do a restoration service for this? This is more so for my own curiosity I don’t really plan on doing a restoration service. Here are some pics of where it’s super dirty and where I cleaned (you can see some black marks on them that don’t come off). Again the glass just has a lot of organic stuff on top of it.
A lot of the time those atrium windows aren’t even glass. They are Lexan etc.
I would set the expectations and get them as clean as you can. I don’t trust atrium roofs like that. They may be sturdy when they’re first installed, but a few decades can change that.
if its glass, some kind of steel wool scrubber pad on those tools you attach in between the gooseneck teeth. if you attach a maeker tbar with the velcro you can stick any pad onto it and it really helps with glass you’re doing with wpole
Mold and algae are real buggers to get off non-vertical glass. You can scrub for a long time and likely get it loose eventually. But other agitation like Bruce said would help.
Man that is bad. I’d hit that with a strong house wash mix , dwell and rinse. Ugh 
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Set those expectations for sure. Test spot before you started maybe too. To see how it goes.
You’d have to rinse off all the loose stuff first too. Then soap !!
I’d get a battery powered pump sprayer from Lowe’s like 89 bucks.
Mix half bleach, half water, few drops dawn. That stuff will disappear in a minute or two. Rinse with garden hose.
Then waterfed.
Yeah I think a HW mix or stronger would have made the difference. Would that be safe on Lexan as Chris said? I’m starting to believe it was Lexan or some other sort of material. The algae was so ingrained that even me using a scrub pad or scrubber didn’t phase it at some areas. Well at least I got paid and it looks better than it was.
