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Hopefully you mean that the vapor barrier faces the "outside" (side out towards you) of the wall cavity as you work on it from inside the house, meaning actuall
by aaronax 5y ago
Hopefully you mean that the vapor barrier faces the "outside" (side out towards you) of the wall cavity as you work on it from inside the house, meaning actually that the vapor barrier is on the side of the insulation nearest the building occupants. The vapor barrier is supposed to go on the warm/moist side of the wall to keep the insulation dry, which in a cold climate is on the inside.
Almost no one should be spraying ether in their cars; carburetors are quite rare nowadays. I have found that a fuel injected car will reliably start in extreme cold (North Dakota) as long as you can get the engine to crank well. And I never use a block heater.
- GnarfGnarf 5y agoYou are correct: the vapour barrier goes on the inside, closest to the warm room. This prevents the moist air in the room from condensing within the insulation, accumulating water and causing rot and mold. My late father-in-law, who worked in construction, says they found out the hard way in the 1940's when fiberglass insulation was first installed, without vapour barrier. Within a few years, entire walls would just collapse, the studs and framing having rotted like cheese. And I never use a block heater North Dakota is South of Calgary.