Why not just carry a collapsable ladder. How often do you plan on getting on the roof. https://www.amazon.ca/Cosco-20311T1ASE-Smartclose-Telescoping-Aluminum/dp/B075MJ1V7V?ref_=Oct_BSellerC_3111726011_3&pf_rd_p=401a8878-15b0-5454-b149-cf388acca1b2&pf_rd_s=merchandised-search-6&pf_rd_t=101&pf_rd_i=3111726011&pf_rd_m=A3DWYIK6Y9EEQB&pf_rd_r=8P9PCBRJN9RZ4FDAHR66&pf_rd_r=8P9PCBRJN9RZ4FDAHR66&pf_rd_p=401a8878-15b0-5454-b149-cf388acca1b2