Insulation Between Narrow Attic Joists

They come with or without a paper or foil facing that acts as a vapor barrier.

Insulation between narrow attic joists.

In practical terms you can choose between mineral wool or insulation boards. When using fiberglass insulation the pink stuff the attic roof rafter will need to be at least 16 deep. In an older home a typical roof rafter can range between 2 4 s to 2 8 s. Uniform stud spacing is a mainstay of today s construction practices because it allows builders to use wallboard.

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. How to install batten insulation when the studs are wider than 16 inches. Come in continuous lengths ranging from 20 to 40 linear feet. 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.

1a attic access door. Ideal for attics floors and other areas where longer runs are needed. 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 wire insulation supports to hold attic insulation up between beams keeping your house well insulated is a good but annoying necessit.

Remove all blown in insulation 2. If you decide on mineral wool such as glass wool or rock wool you will need to put down a damp proof membrane. If the air distribution is in the attic space then consider insulating the rafters to move the distribution into the conditioned space. Insulation rolls available in pre cut widths to fit between studs and joists.

Cut foam board to fit in between joists. 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. So insulating the floor of the attic is not only the best solution but it is also the simplest and cheapest.