Best Way To Insulate Cathedral Ceiling

A cathedral ceiling is often difficult to insulate as they leave very little room for ventilation which is needed to keep the insulation dry.

Best way to insulate cathedral ceiling.

Cellulose offers much greater insulating power per inch and compared to fiberglass provides more insulating room because ventilation space is not required. This means that in a limited space such as a cathedral ceiling cellulose offers a much higher stated r value. One of the best options would be spray foam insulation here s why. It is also one of the most expensive and most building inspectors will not allow it to be left uncovered for fire code reasons.

Put the baffle between the joists starting where they join at the exterior wall plate. Assuming the rafters and 2x6 boards are properly sized to handle the roof loads a simple cost effective solution is to use a preassembled panel of expanded. In general closed cell foam is the best choice for unvented cathedral ceilings. I m in a 6 000 degree day climate.

The difficulty with trying to insulate a cathedral ceiling is that there is the possibly of insufficiently insulating the space or the angle of the ceiling makes it tough to insulate properly. 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. So far it seems the best approach is to have 2 3 inches of closed cell foam sprayed directly into the rafter bays on the underside of the zip i can t afford to have 8 inches of spray foam. Cathedral ceilings were once popular due to their grandiose height and appearance but these days many people avoid it because it is difficult to get proper cathedral ceiling insulation installed.

What is the best way to insulate a cathedral ceiling with exposed 2x6 t g boards above the rafters. I hope to finish the ceiling with pine boards. 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. Foil faced iso board can be cost effective insulation for finished attics and cathedral ceilings.

A bill zoeller an architect with steven winter associates in norwalk conn responds. Insufficient traditional insulation can lead to drafts and air leakage thanks to gaps and holes in where the insulation is installed.