Insulate Garage Roof Below Bedroom

The ceiling is currently drywalled and i could see some r 9.

Insulate garage roof below bedroom.

Since you re trying to control the bedroom and the insulation will fall to the ceiling of the garage look into air ceiling the crawl space so that air cannot penetrate from the outside. Hi everyone i have a split ranch with a 2 car garage under the bedrooms. To insulate the floor of the room above the garage seal the space between the floor of the room and the ceiling of the garage and the top plate and the header joist with insulation. This heated plenum ensures that rooms above the garage stay warm.

The back wall of the garage is completely below grade the left wall is half below grade slope the right wall connects to the 1st floor and the front wall has two 8x7 insulated doors. The picture below shows the garage and the dormer window of the 4th bedroom. One of the easiest ways to insulate the ceiling of your garage is to infill between the joists with batts of fiberglass or rock wool insulation. 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.

This can be done through blown in insulation and unfaced or faced batt insulation. If your ceiling is unfinished you can do this from below before attaching drywall to the undersides of the joists. Insulated garage doors typical only add about an r 3 5 insulation barely enough to make a noticeable difference. There are no windows the joists are 9 tall and i am in massachusetts.

A better way to assure a warm and cool bonus room is to condition the garage space below by heating it or cooling it as needed. I don t mind spending a few hundred pounds insulating the garage ceiling if it will make a comfort difference. We use r40 batt insulation with a sealed poly air barrier but then we also run the heating ducts into the cavity above the insulation and below the floor. Something to look into would be dense packing cellulose.

If someone spends a lot of time in the garage insulating it may improve their comfort even if it doesn t lower any bills.