Air barrier

An air barrier is like a big wall in your home that helps keep the air inside your house from escaping outside. It's kind of like a force field that keeps all the warm or cool air in one place.

When you put on a warm coat in the winter, it keeps your body heat in so you stay warm. Well, an air barrier works in the same way, but for your home.

It can be made of different materials, like plastic, foam, or certain types of insulation. The important thing is that it covers all the holes, cracks, and spaces where air might escape or come in from the outside.

So, if you want to keep your home nice and cozy in the winter, or cool and comfortable in the summer, you'll want to make sure you have a good air barrier to keep the air where it's supposed to be.