Adding new (climbing) rope on 20 ft extension ladder for $8 !!!!
I've used exactly 17 ft of 7mm climbing rope from REI ($0.45 per ft=$8).
You will need:
1) new rope (17ft for 20 ft ladder)
2) utility knife - to cut left overs
3) some kind of lighter - to quickly burn ends before they start split
4) I've used tape - to mark where we make 2nd knot (rope needs to be a bit loose)
