I would imagine it will go hard and dry , I doubt the customer can see it unless they have windows directly above it
Hopefully she'll be OK about it but looking forward, this might be the nudge you need to dump any work you have that involves flat roofs, ladders etc, I put my knee through my own flat roof and it was the spark I needed to take a good look at my work, you don't wanna be sticking your foot through a customers.
Cleaned a customer today has conservatoryWith flat roof With the material Lino stuffNow had treated with white sealant I thought it was dry but in middle wasn’t and left some foot 🦶 prints 😭I have to stand there to acces loft extension windowsI did text her night before nothing mentioned About roofI’ve cleaned for about 4 years 🤔I did mention from beginning would have to stand on flat Connie roofI just text her this message Hello Rebecca Lee window cleaner Unfortunately I've had a mishapCleaning your windowsI usually stand on your conservatory roof to clean above windows The sealant on roof now has a few of my footprints I have liability insurance so let me know what you want to doI'm very sorry as I felt roof before I got on and side nearest me was solid / dry.My apologies LeeI thought I’d give some of you a laughAny idea where I stand (no pun intended)Plainly my fault Felt I couldn’t pretend As they’ll see it sooner or later 😥