Combining Foam Board And Batt Insulation

To insulate the inside of the above grade or below grade walls.

Combining foam board and batt insulation. While installing batt insulation can be a potential diy project it s best to consult with a professional. Would having the ridged foam between the drywall and the fiberglass bats prevent moisture from migrating into and condensing in the walls. It comes in standard size 4 8 sheets and smaller sizes in many different thicknesses from 1 4 inch to 2 inches. When you use foam it green closed cell spray foam for the first 50 of the r value and then use fiberglass or another low cost insulation to get the air barrier and high starting r value and then add in more r value.

Flash and batt is a hybrid insulation approach combining fiberglass insulation and closed cell spray foam. To insulate the underside of ceilings. Insert foam board between the studs to seal everything up tight and then install fiberglass batts over the foam board. Flash and batt is a combination of spray foam insulation with fiberglass batts.

This is done so that drywall can be painted to tiled. Foam board insulation is easy to use and is a great diy way to add some insulation. Cut n c plywood so drywall can fit just behind the bottom of the upper cabinets by 1 inch. Perhaps adding a foam strip on the studs to create an air gap between the foam board and the back of the drywall.

Finish with plastic stapled to the studs then drywall. Halo interra foam board insulation can be applied to the studs covering the batt insulation. Foam board on the other hand is rigid and will break if you try to bend it. Batts in stud bays first then 1 foam panels to the inside of the room then drywall.

Halo interra foam board insulation is applied to the foundation wall and batt insulation is applied afterward. Use batt or foam or cellouse in the wall stud cavity as you like. In this case i am assuming that the plastic will prevent indoor humid air from getting inside the wall. Cover with foam attached to the studs and cover foam with 3 4 inch non com plywood to maintain fire rating for wall behind cabinets.

With the old house the 2x4 studs are actually at least 4 not 3 5. Thinking of going with 1 of rigid foam board and then adding a fiberglass batt on the inside of that. Flash and batt insulation is one example of a new technique being implemented by insulation contractors. Some types of thicker foam board insulation are available but they may need to be special ordered.

We like fiberglass batting for northern california homes because it is easy to install and waterproof.