They’re actually a moisture and air barrier that seals gaps and leaks in the oriented strand board (OSB) panels or plywood sheathing that makes up a layer beneath your home’s siding. … The main purpose of using a house wrap is to prevent the entry of moisture into the wall cavity from outside.

Is a house wrap necessary?

While it may seem like an unnecessary and time-consuming addition to your home, the house wrap is actually a necessary component for every American home, no matter the climate of your area. This is because house wrap can provide an effective moisture barrier for your home.

What 2 things does house wrap do?

Housewrap (or house wrap), also known by the genericized trademark homewrap (or home wrap), generally denotes a synthetic material used to protect buildings. Housewrap functions as a weather-resistant barrier, preventing rain from getting into the wall assembly while allowing water vapor to pass to the exterior.