Insulation Between Narrow Attic Joists

How to install batten insulation when the studs are wider than 16 inches.

Insulation between narrow attic joists.

Remove all blown in insulation 2. When using fiberglass insulation the pink stuff the attic roof rafter will need to be at least 16 deep. In unfinished attic spaces insulate between and over the floor joists to seal off living spaces below. Cut foam board to fit in between joists.

If the air distribution is in the attic space then consider insulating the rafters to move the distribution into the conditioned space. Come in continuous lengths ranging from 20 to 40 linear feet. So insulating the floor of the attic is not only the best solution but it is also the simplest and cheapest. 1a attic access door.

In practical terms you can choose between mineral wool or insulation boards. Use wire insulation supports to hold attic insulation up between beams keeping your house well insulated is a good but annoying necessit. In an older home a typical roof rafter can range between 2 4 s to 2 8 s. As for insulating below the joists an insulating laminate insulation bonded to plasterboard such as celotex pl4000 or a separate rigid pir insulation board finished with a separate sheet of plasterboard can be securely fixed to the joists to provide an internal finish to the roof.

Uniform stud spacing is a mainstay of today s construction practices because it allows builders to use wallboard. Start in a corner away from the attic hatch and fit the roll insulation between the joists facing against the drywall. If you decide on mineral wool such as glass wool or rock wool you will need to put down a damp proof membrane. 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.

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. 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. 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.