Should You Insulate Between Roof Rafters

You can also add rigid foam insulation under the rafters which adds r value and eliminates thermal bridging through wood rafters.

Should you insulate between roof rafters. The rafters are joined together by a horizontal ridge board at the top and tied together by ceiling joists at the bottom. Make sure it is flush against the wood as also a 1 inch gap can create a 20 percent heating loss. You can use rigid foam panels or do as tom silva does with nearly all houses these days. The ones i ve used are made of styrofoam and iirc they cost around 2.

For rolled insulation location it in between roof covering rafters. Attic moisture problems are often the result of heated air from the living space rising up into the attic which is not heated. This means insulating between or below the sloping beams that form the construction and support a sloping roof. Install ventilation baffles into the space between the rafters before you install the insulation usually by stapling into place.

You can add insulation to the floor. A vent baffle should be installed between the insulation and the roof decking to maintain the ventilation channel. Insulating between rafters will do no good because the attic should be ventilated and the rafter insulation would be between two unheated spaces. Hire a pro to install spray foam insulation.

Consider using high density r 30 batts which are as thick as r 25 batts but fit into 2x10 framing. On new build or replacement pitched roofs the ideal build up would be insulation fitted over and then between the rafters giving a big boost for airtightness image credit. In order to avoid damage to the roof deck you should insulate ceilings to create an air barrier between the living space and an unfinished attic or airspace underneath the roof deck. Insulating the rafter space will give you a warm loft.

If your attic is going to be converted into livable space then you will need to insulate the roof rafters. The will hold open an air gap of approximately 1 inch to allow airflow past a layer of insulation. 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.