Hi guys. I'm Looking to buy a double A frame ladder but not sure what size to go for. At the moment i use a normal open ended extension ladder which is 10 rungs i believe. its been okay for me 99% of the time, but lately i'm picking up more houses with the little slanted roofs under the first floor windows that i cant get to with the normal ladder. what size A frames do you guys use? Would a 13 rung double "A" be long enough? that seems to be the biggest on midland ladders. Cheers Paul.