Apply insulation between rafters when finishing an attic into a heated room or when building a cathedral ceiling in the home.
How to install insulation in roof rafters.
Air circulates from the lower part of the roof overhang through the rafters.
We would always recommend having a breathable membrane in place between the tiles and the rafters too to allow the roof to breathe.
Typically you will fill the insulation blower with the insulation and blow it between the attic floor joists.
Garages built without attics are.
Install ventilation baffles into the space between the rafters before you install the insulation usually by stapling into place.
When installing rigid insulation in an attic to be finished as a living space you must provide a route by which hot air can escape.
This requires the use of soffit vents and a roof ridge vent to.
Once you have these in place measure the length of the spaces between your rafters.
How to install rafter insulation.
The baffles will allow circulation to continue even though insulation has been installed directly in the path of the rafter air movement.
If you have a solid floor covering the roof rafters use the claw end of a hammer to pull the floor up in several locations and blow the insulation under the boards.
I would really like to get more than r 13 and the current installation is probably providing r 1 with all the missing pieces.
Then blow another layer on top of the roof rafters.
Cut each piece of insulation an inch or two longer than needed to assure a snug fit.