Title is pretty much everything!
I have these high up windows that I'd like to clean and maybe in the future install curtains on. I guestimate the wall being 20ft (6m) tall.
For other rooms in the house I typically use an A-Frame, but it's impossible to find an A-Frame to reach that high where I am.
I plan on draping a towel over the top of the ladder to prevent scratches and scuffs on the wall, as well as getting a rubber mat or something if the floor seems slippery. I am just not sure if drywall would support a ladder? Especially near the frame of the windows. Maybe there's something else I'm not considering as well?
We have pool noodles split in half and zip tied to the part or the later that touches.
Near the frame of the windows it should be strongest unless the corners were done wrong. They should have metal things there to support the corner under the texture, and it should have double 2x4s all around it.
Also, if possible, tie off the bottom so it can't slip out.