“…Firstly, technical problems -lack of skilled workforce (Galvin and Sunikka-Blank (2013); Weiss, Dunkelberg and Vogelpohl, 2012), poor accessibility to skilled workers (Neuhoff et al, 2011;Sebi et al, 2019), lack of collaboration between differently skilled workers (Galvin and Sunikka-Blank, 2017); and difficulty in identifying which retrofit measures apply to individual properties (Wu et al, 2017). Secondly, financial problems -initial investments are unaffordable (Myhren et al, 2018;Ortiz, Caquero-Modrego and Salom, 2019;Tsoka et al, 2018); there is uncertainty around investment returns (Galvin, 2012), and there is a lack of financial support (Sebi et al, 2019). Thirdly, management problems -tensions can arise between landlords and tenants if the property owner is unwilling to invest in high energy-efficiency retrofits; this means tenants are unable to benefit from lower energy bills and more sustainable living (Lang et al, 2021).…”