Vented Cathedral Ceiling Insulation

Straight bays 2x12 24 o c.

Vented cathedral ceiling insulation.

A cathedral ceiling is a sloping and pointed ceiling which is usually high and open. In fact as far back as 1975 ncima standard n 301 75 stated. In particular using fiberglass insulation in an un vented cathedral ceiling is most likely to give way to discovery of advanced hidden damage and or mold over the life of the building and may give shorter roof shingle life as well as causing higher indoor temperatures than with a vented roof cavity design. Solar age magazine articles on renewable energy energy savings construction practices best practices guide to cathedral.

Have a newly framed vented cathedral ceiling to insulate. Although many view this as a new method as stated previously many contractors have been doing this for years. 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. That is create a vent channel above the insulation with low and high vents.

The current plan is to use batts of some kind in the bays take care to air seal the interior surface avoid penetrations air seal the vent channel too bays fully sealed double prime the inside surface for vapor resistance. Should i install an air barrier in the cathedral ceiling above the insulation. Cathedral ceiling ventilation design guide how should i vent a cathedral ceiling. It provides an open airy look and feel to the room and they are often in demand among home buyers.

Utilizing cellulose insulation contractors blow the cathedral ceiling cavity completely full and do away with the need for outside ventilation.