Insulating Floor Above Garage. Run the polyethylene up the sides of the walls 3 to 4 inches and secure to the walls with construction tape. In most cases the builders install fiberglass rolls of insulation in the cavity under the floor while.
If space for insulation is not so much of an issue then there are several solutions depending on the construction of the floor and the difference between the floor height of the garage and required floor height of the new room. The options you have for the room in general are fiberglass batts blown-in cellulose blown-in cellulose injection foam and spray foam. If your homes HVAC system does extend into the garage then the attic above it should be insulated as it would for any other room of the house.
In fact rooms that are located over garages are notoriously difficult to heat in the winter and cool in the summer.
A cold room bedroom office or any other space over the car garage is one of the most commonly encountered issues that homeowners face. If HVAC ducts are routed through the floor assembly the floor joists must be deep enough to install several inches of insulation under the ducts. In most cases the builders install fiberglass rolls of insulation in the cavity under the floor while. When building a room over the garage the general construction can be done the same way as for the rest of the home but there are some specific aspects that require attention to ensure occupant comfort.
