Hi all, i've been looking for some guidance to help troubleshoot and solve a cold extension we've got and this forum felt a good place to ask.   It's a single story gabel extension (6meter x 5 meter, vaulted ceiling) done about a year ago, we noticed this Winter that something isn't right regarding it's temperature and comfort levels. At this point i'm not sure whether it's due to draughts or something else contributing to the heat not being retained well , but it's notably colder