Why do we need air barriers?
I just dont understand the point of an air barrier on the inside of a building? they stop air movement, well isnt that what the insulation is supposed to do? so what is the air barrier doing that the insulation isnt?
Also why vapour barriers? isnt insulation suppose to stop cold air from entering and hot air from escaping? Is it not the case that vapour is only created when hot air enters a cold environment yet if the insulation is working will this not mean that a vapour barrier is pointless?
Apologies for my ignorance I just dont quite understand the elements at play here.
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A collection of one thousand construction details organized by climate and house part