How To Insulate A Roof And Soffit

Insulating and venting when there is no roof soffit.

How to insulate a roof and soffit. Alternatively use two half sheets of 3 4 inch. The soffit vents are now installed but you still need to make sure there s no insulation blocking the new vents. If there s blown in insulation like ours rake back the fluffy stuff with a 3 or 4 ft long 1 x 6 or use a garden rake or hoe. Lay strips of 3 4 inch plywood that are at least 24 inches wide across the floor of the attic.

An advantage of spray foam is it s quick whereas foam board needs to be cut and measured which can be a chore. If the attic is insulated with fiberglass batts just pull back any that are blocking the flow of air. Staple plastic or foam baffles to the roof sheathing near the eaves to keep the material away. How to keep blow in insulation out of soffits.

To insulate the roof itself you either use spray foam or retrofit with it with rigid foam board. The airflow from the soffits to the ridge vent keeps the roof cool and prevents ice dams and the material will block that flow. Set the baffles inside the attic opening along with a loaded staple gun. The principle behind soffits is to allow air to circulate in and around the attic.

In most residential homes the soffit and associated vents is the structural part of the roof that hangs over the side of the home.