Rafter insulation is insulation that is installed usually when a home needs attic insulation but doesn’t want it installed in the attic floor. It is an option that can be placed on the bottom of the attic floor instead of on top of the attic floor. This is also used if you have a cathedral roof and need insulation installed to the ceiling. If you choose rafter insulation, there are three different options to choose.
- Fiberglass batts are fit and installed in between the rafters. Before this is down, insulation baffle is put in to ensure that ventilation is still possible.
- Spray foam insulation is another option. This is a great option because it’s a fast way to put in insulation and it will fill the space to fit perfectly. A down side to it though is that it doesn’t allow any vent space in your roof and lends itself to capturing moisture, resulting in mold.
- Rigid foam insulation is probably the best option for rafter insulation, especially for cathedral ceilings. The foam boards can be secured onto the ceiling and allow for ventilation of the roof.