Air & Moisture Barriers

Air and moisture barriers are essential in maintaining optimal building performance. They make a building more energy efficient, comfortable and strong.

Air barriers are required in building walls, regardless of region or climate.
There are two main types of air barriers:

Permeable Air Barriers – they allow moisture vapor to pass through the membrane

Impermeable Air Barriers - also known as vapor barriers, they block moisture vapor as well as air

Your climate and wall design ultimately will determine which type of air barrier is right for you.


We can consult you on which air barrier is appropriate for your project.

At Keystone Exterior Finishes, our crews are certified in applying air and moisture barriers.