I have a Youngman 100 extension ladder each section is about 6.6 ft my gutter Hight is 16ft so with 4ft for safety, can I add a 7ft extension to a 13.2 ft double extension ladder? and if I can where do I buy one ? Many thanks for any replies
No. You will need a new ladder. Either a 200 series triple section, 1.93 or 2.51m or a twin section 2.51m