I place an old thick bath towel under my ladders on wet decking. I've done this for years and it works a treat.
John
I friend of mine used to do that...
One day he placed the bath towel under his ladder, climbed to the top, started cleaning the window - the ladder slipped... He broke both wrists and a leg and had a massive bruise on his head. He's actually lucky that he survived.
He's 100% WFP now - He doesn't even carry ladders anymore.
Andy