Can You Use Tar Paper for House Wrap?

Identification

• House wraps are constructed from fibrous spun polyolefin plastic, which is pressed into sheets. These wraps also have materials that make it resistant to tearing. House wrap is placed on homes to keep outdoor air from moving through the home, keeping it energy efficient. According to the U.S. Department of Energy, other materials may also block air such as drywall, decking or sheathing.

Effects

• Placing house wrap on your home can block air from moving through your home, which keeps the indoor temperature steady. These wraps may also retard moisture and provide a weatherizing effect. When your home has house wrap installed on the exterior and is properly insulated on the interior, it uses less energy. According to the U.S. Department of Energy, using house wraps to prevent air leakage saves more than 30 percent each year on energy costs.

Exceptions

• Homes that have certain types of wood siding may benefit from using tar paper instead of traditional house wrap materials. Certain types of wood such as cedar and redwood may be damaged by traditional house wraps. This is due to a natural substance inside the wood known as lignan, which decreases traditional house wraps' ability to retard moisture. Heavy-duty tar paper can be used as a house wrap in these instances. Placing felt paper over the tar paper will repel water and prevent moisture damage.

Considerations

• After installing house wrap or tar paper, you can increase the energy efficiency of your home with proper air sealing. Caulking all small gaps in walls, ceilings, attics and basements will keep air from entering your home. Large gaps can be sealed with strips of rigid foam board insulation. Adding insulation to your attic will also increase the effects of your house wrap and save you money on your energy bills.