Hi everyone,   5+ year reader and finally taken the plunge to join.   It's almost 3 years since we bought our house, a 1920's detached house extended twice (late 1990s/early 2000s, the latter extension considerably better quality than the first). I wanted to build a Passivhaus but the impossibility of finding a plot at a sensible price prevented that.   We soon discovered this house was cold and draughty and we could see daylight in the eaves storage. Since then I'v