Extension Ladder Height Selection
 

Ladder Support Points of Typical Home

Height to Support Point Suitable Extension Ladder*
9 ft max 16ft
9 to13 ft 20ft
13 to 17 ft 24ft
17 to 21 ft 28ft
21 to 25 ft 32ft
25 to 28 ft 36ft
28 to 31 ft 40ft
 
Average Heights of Typical 1 and 2 Story Homes
 
*Reflects ladder sections' overlap, ladder angle, and 3 foot extension above roof line.