Many posts about roof blisters and potentially a lot of Marcos running out of warranty. So what effect will blisters have on resale values? I havent seen any for sale adverts mention the condition of the roof or if they have been replaced and how many times? Are blisters a serious mechanical fault or a nasty cosmetic issue? If warranty runs out do you then just accept them, keep paying for repairs or just fit a few solar panels to cover over?