How To Insulate A Home With No Attic

Loose fill or batt the common term for blanket insulation.

How to insulate a home with no attic.

The total venting space should equal 1 150 of the floor space. Replace old windows with energy efficient units. Install siding over the insulation. Attach 1 inch foam board insulation.

Most codes require a specified minimum amount of headroom and it s tough to meet this requirement when insulating a finished attic especially since most. Pick up the blower and insulation. To meet all three goals insulating your finished attic ventilating the roof and maximizing headroom use a combination of dense batt insulation rigid foam sheeting and air chutes. How to insulate walls in an old house.

Ask this old house general contractor tom silva shares some diy smarts tips for insulating an attic. I would lean toward adding rigid foam either on top of the roof or on the inside under the joists if reducing headroom isn t a problem. Cut and insert 1 or thicker high r foam insulation sheets r 8 per inch against the furring giving a 1 or greater air path between the insulation and the roof deck under the cathedral ceiling. Depending on your climate you ll need r 30 to r 49 to meet code which is 5 to 8 1 2 inches of polyiso rigid foam which is r 6 per inch.

Nail 1 furring along every rafter side against the roof deck. A passive ventilation system should have air inlets at the base of the roof usually in the soffits and outlets in the peak or gables. Lay a two by four on top temporarily compressing the insulation to a manageable. By tom silva and kevin o connor host.

For diy attic insulation you ve got two choices. Both can be added to uninsulated attics or layered over existing material. Apply a house wrap vapor barrier to exterior walls. To cut blanket style insulation place the product over a piece of plywood with its paper or foil side down.

Improve the value of your home by discovering our insulation step by step tips ideas. Caulk window trim and use weatherstripping to reduce air leaks. How to beef up attic insulation. Once you ve decided which type is best for you examine the material options and prices to home in on the right product.