Vented Cathedral Ceiling Insulation

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

Vented cathedral ceiling insulation.

Although many view this as a new method as stated previously many contractors have been doing this for years. Then insulate below with fiberglass or cellulose add a vapor retarder and your finish ceiling. 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. 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.

Have a newly framed vented cathedral ceiling to insulate. In fact as far back as 1975 ncima standard n 301 75 stated. Cathedral ceiling ventilation design guide how should i vent a cathedral ceiling. Does air movement wind washing through a vented cathedral ceiling cause heat loss through the insulation.

Solar age magazine articles on renewable energy energy savings construction practices best practices guide to cathedral. Straight bays 2x12 24 o c. Should i install an air barrier in the cathedral ceiling above the insulation. 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.

You ll want a tight ceiling air barrier with no air leakage into the cathedral ceiling a critical detail for all cathedral ceiling designs.