Hey Ron,everybody run from that Q'tion,hahahaha,I figured as long as it has been sence I washed any house's someone would have solved dat problem by now,don't you just hate it when its on wood hehehe.
If you want to be a pro,don't pull it off but cut it off,yel takes alot of time,after that let the part thats still on the house dry for several days before you wash it.On wood turn psi down as the paint will be easy blown off b/c the roots that grabed are inbetween the wood and paint,it will be lose after the plant dies b/c more of its parts has decayed inbehind the paint and wood as more will more out making your wash job look better,if pulled off painted wood you'll pull off paint also as the reason to cut it off.
Alumu the same way.
Vin'le is alittle different,you can pull some of it off fairly easy without damage but the ones that are really stuck needs to be cut off.
alot of your accounts doesn't know the damage it does to their homes as to what it may look like if they pull it off.
I always told them yel I'll wash it but lets wait 2 or 3 weeks for it to decay,it'll look better than if I wash it now but still they will be several spots that will show,in time some will fade some want.........if real bad it may be cheaper to repaint then wash.
another way is to use a chemical to kill the plant,it save's you from cutting and you can wash it off instead of pulling if you let the chemical kill the plant all the way to its grabs.