How To Insulate Rafters In Attic

Get your kits the easy to use spray foam kit.

How to insulate rafters in attic.

Lay a two by four on top temporarily compressing the insulation to a manageable. To cut blanket style insulation place the product over a piece of plywood with its paper or foil side down. For rolled insulation place it between roof rafters. How to install rafter insulation.

Attach baffles to the bottom of the roof sheathing the plywood or solid wood strips onto which roofing material was installed. The best attic insulation. You can use rigid foam panels or do as tom silva does with nearly all houses these days. Attach the insulation to the rafter scab board by the paper flange so as not to compress the fiberglass.

Make sure it is flush against the wood as even a 1 inch gap can cause a 20 percent heating loss. R value of 7 in 1 inch 97 closed cell foam. Install ventilation baffles into the space between the rafters before you install the insulation usually by stapling into place. Staple it to the rafters or scabbed on boards with a staple gun so that the paper backing is toward the interior of the room to act as a vapor barrier.

Then feed the rolled insulation under wires and pipe if either is present. In this case the area behind the knee wall will be uncomfortably hot or cold. 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. In just a few minutes you ll have the information you need to make a smart purchasing decision for your home.

Use 3 8 inch heavy duty staples every six inches. There are two basic ways to insulate a finished attic. Use closed cell foam it green for attic rafters. Place the plastic sheeting on top of the rolled insulation.

Don a long sleeved shirt safety glasses gloves and a dust mask to prevent irritating fiberglass from reacting with. If you re considering turning your attic into conditioned storage or living space it s worth changing tactics to insulate between the rafters and wall joists instead of the floor. If only the living space will be insulated wrap the insulation around the room s walls and ceiling and then continue along the floor of the non living space. Spray foam insulation that s convenient and easy to use.

If you re finishing your attic insulating it to the proper r value can cause a dramatic loss of headroom if you limit yourself to fiberglass batts.