I’ve been asked to quote on 9 skylight windows of a commercial building. Three problems.
The windows can only be accessed from above, meaning that I’ll have to pole them above the window down. I’ll be on the roof, the windows slope down the front of the building.
Lots of pollution stains and concrete runoff. If I use a strong chemical, I won’t be able to affectively rinse off the frames and the rest of the building.
This building is close to the street and has high pedestrian traffic so I can’t use tonnes of water either.
The person I’m submitting the bid to has given me some good work this year, I’d hate to have to pass.
Besides scraping/scrubbing, what chemical or cleaning agent would least likely cause any damage to the frames or the rest of the building?