Vaulted Ceiling Insulation Air Gap

Ventilation channels maintain an air gap between the insulation and the roof sheathing.

Vaulted ceiling insulation air gap.

It provides an open airy look and feel to the room and they are often in demand among home buyers. Cathedral ceilings built using 2 x 12 roof rafters allow enough space for the fiberglass batt insulation and a 1 5 gap for ventilation. A cathedral ceiling is a sloping and pointed ceiling which is usually high and open. These are brand new condominiums and we ve insulated according to the builders specification with fiberglass in the walls and we re going to be blowing the flat of the attic space with cellulose along with the rafter spaces in the cathedral ceiling.

Air sealing and insulating. Vented cathedral ceilings can be difficult to insulate well. Cathedral ceilings are a feature in many homes that add to value to the house because the high ceiling tends to make rooms look larger. The component that creates the gap is called a variety of things including a ventilation baffle a ventilation chute a ventilation channel or a product such as proper vent.

In those days most builders stuffed cathedral ceiling rafter bays with fiberglass batts. Insulated cathedral ceilings are a relatively recent phenomenon. In a vaulted ceiling however the only fresh air route lies between the insulation and the underside of the roof deck.