They keep your home at a comfortable temperature without the need to crank your heat.
Foam board insulation garage ceiling.
I hate to burst your bubble but most building codes require a minimum of a one hour fire resistance wall and ceiling covering in a residential garage if the garage is part of the house.
Measure the height and width between the framing in the ceiling and pre cut the pieces you ll need.
You can insulate the walls ceiling and door of the garage to the highest r value possible but if you fail to fill those air gaps you ll still be wasting a lot of heat.
Types of insulating boards choose from three types of insulating foam core boards for wall insulation.
Use fibreglass cellulose foam board or closed cell spray foam if.
It provides an r value of 4 per inch of thickness and is the cheapest type of foam board insulation.
R 3 2 polyisocyanurate rigid foam insulation board.
So before insulating go around the garage with a can of low expanding spray foam and seal all gaps and cracks that let in the daylight.
Rigid boards are manufactured from either.
0 78 in x 8 ft x 4 ft.
0 78 in x 8 ft x 4 ft styrofoam residential sheathing 15 psi 1 faced polystyrene garage door foam board insulation with sound barrier item 14545 model 202059.
This foam board insulation is the rigid pink or blue panels that can be found at home centers in many different thicknesses.
Insulating the ceiling of your garage involves the same process as insulating the walls.
Regular ceilings are likely to be under attics with either batt insulation between the joist bays or in some cases rigid insulation between the rafters.
Eps is used under roofing over foundation walls and beneath siding.
If it isn t you don t want to insulate.
Rigid foam insulation also known as insulating boards provide high r values.
You can even place it under the foundation slab.
You may need to cover all of that foam insulation with fire code 5 8 inch plasterboard to meet those code requirements.
Doing so can cause mildew.
But if the garage is heated you should definitely insulate.
Just remember to use thicker r 40 insulation.
R matte rmax r matte plus 3 1 2 in.