Insulating A Garage Ceiling With Living Space Above

This heated plenum ensures that rooms above the garage stay warm.

Insulating a garage ceiling with living space above. If you are insulating the garage ceiling not only by the truss level but also up by the roofline then you must leave at least 1 1 2 to two inches of air between the fiberglass and the underside. Fiberglass is the most commonly used type of insulation in garages just as it s the most popular type in homes. Use fibreglass cellulose foam board or closed cell spray foam if it were my garage i d go with spray foam.

There should be a continuous ridge and soffit ventilation. Urbandale s approach is a little different. You can also get loose fill fiberglass which it suitable for blowing into a garage attic space above a finished ceiling.

Make sure you have enough ventilation on your roof as well. 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. Air seal the floor above a garage when there is living space above the garage and make sure floor insulation is in full contact with the underside of the subfloor.

Any kind of openings where electrical cables or plumbing pierce via the wall require a good squirt of terrific things about how to insulate garage ceiling with room above. This can be done through blown in insulation and unfaced or faced batt insulation. In order to protect against gas and also cars and truck fumes from leaking via the walls as well as into your residence.

Air seal rim joists and any holes in the top plate of the garage walls. Then cover it with drywall. Seal all seams gaps and holes in the subfloor air barrier with caulk or foam.

Insulating the attic above the garage will help keep temperatures in the garage a bit more stable but it won t have any appreciable effect on energy bills. But if the garage is heated you should definitely insulate.