Insulation Between Narrow Attic Joists

Ideal for attics floors and other areas where longer runs are needed.

Insulation between narrow attic joists. Come in continuous lengths ranging from 20 to 40 linear feet. When using fiberglass insulation the pink stuff the attic roof rafter will need to be at least 16 deep. Insulation rolls available in pre cut widths to fit between studs and joists. Use spray foam to seal the foam between the joists this will both insulate and create my air barrier for this portion of the attic.

1a attic access door. This flexible insulation material is most often packaged in rolls that come in various thicknesses and standard widths usually 16 inches and 24 inches to fit between joists or studs in a house s framing. So insulating the floor of the attic is not only the best solution but it is also the simplest and cheapest. Uniform stud spacing is a mainstay of today s construction practices because it allows builders to use wallboard.

In unfinished attic spaces insulate between and over the floor joists to seal off living spaces below. In practical terms you can choose between mineral wool or insulation boards. Cut foam board to fit in between joists. Remove all blown in insulation 2.

In order to create a deeper cavity for the insulation it will be necessary to attach wood framing to the existing rafters through a process called furring. They come with or without a paper or foil facing that acts as a vapor barrier. Start in a corner away from the attic hatch and fit the roll insulation between the joists facing against the drywall. If the air distribution is in the attic space then consider insulating the rafters to move the distribution into the conditioned space.

Use wire insulation supports to hold attic insulation up between beams keeping your house well insulated is a good but annoying necessit. If you decide on mineral wool such as glass wool or rock wool you will need to put down a damp proof membrane. If your house doesn t already have a layer of insulation between the joists you ll need to install one before adding a layer over the joists.