Best Way To Insulate 2x8 Cathedral Ceiling

16 gap at the peak 6 gap down near the wall top plate intersection.

Best way to insulate 2x8 cathedral ceiling.

Although many view this as a new method as stated previously many contractors have been doing this for years. Cold climate michigan note. Use closed cell spray foam closed cell foam board extruded polystyrene such as dow styrofoam or foil faced iso board. Although the gba website already contains many articles on the topic we continue to receive frequent questions about the best way to insulate a cathedral ceiling.

It s therefore time to pull together as much information on the topic as possible and publish it in one place to clarify the building science issues and code requirements. Seal the insulation or the ceiling surface below against air leakage. Place the insulation between the rafters or below them. 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.

Utilizing cellulose insulation contractors blow the cathedral ceiling cavity completely full and do away with the need for outside ventilation. One of the best options would be spray foam insulation here s why. Ted what is the best way to insulate a cathedral ceiling with 6 16 of space between the drywall and roof sheathing. It provides an open airy look and feel to the room and they are often in demand among home buyers.

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. Soffit vents and ridge vent are available. An unvented assembly can perform well but it s important to get the details right to avoid sheathing rot.

Bernice from midland ontario wants to know how to get more insulation into her vaulted or cathedral ceiling the common problem with structures like this that we call compact roofs is that there is not usually enough space for a lot of insulation and a lot of ventilation. Air permeable insulation such as fiberglass batts dense packed cellulose or blown in fiberglass can t be used alone for an unvented assembly since these types of insulation can allow moist indoor air to reach the cold roof sheathing leading to condensation or moisture accumulation.