there have been contests to see how fast a house can be built, but I need to document the time and source of the information.
It depends on the type of wall, where it's being used and of course your budgetThen there are also environmental considerations, there are lots of alternatives, such as sheep wool or recycled newspaperPIR/PUR is one of the best for general useIt is widely available, has a high level of thermal resistance and is generally rated A in the Green Guide.
Stud walls - Exterior: Fibreglass without paper or vapour barrierFit the fibreglas bats in between the studs so it fits snug without folding or any gapsPlace a vapour barrier on the warm side of the wallin colder climates this is the inside of the wall.
This may be a silly answer butHave you ever watched that tv show, Extreme Makeover: Home Edition ? They actually tear down the old building, build an entirely new home, fully furnished, with many extras, and professionally landscaped, all within about 6-7 daysThen on top of that, they have a huge BBQ party at the endI say it can't be beatNote: The home they built on the Habitat for humanity site shows they started with the foundation already in place (which takes a few days to dry), so I say that doesn't even come close to Extreme Makeover's jobs The Guiness book of world records may be more specific, check it out.
