Air and vapour barriers
What is an air barrier?
...Construction (IRC) at the National Research Council (NRC) lists the five basic requirements for an effective air barrier as being:
1. Continuous: no gaps, cracks or openings.
2. Impermeable to the leakage of air.
3. Rigid: supported in both directions from wind pressure.
4. Durable: must last the life of the bu...