Gino
Premium Subscriber
It really depends on your ladder. Whatever rung width will accept them is basically how high ya can go. We have some 15' step ladders and I think we can get about 12' in the air, plus our bodies, so we're around 16' to 18' up. However, most of the time, we're around 4 to 8' off the floor to reach the tops of some large vehicles.
Wow mosh..... for being your Dad's old ladder jacks, that stuff's like brand spanking new.