Insulating A 2x6 Vaulted Ceiling

R value insulation receives a rating.

Insulating a 2x6 vaulted ceiling.

A cathedral ceiling is a sloping and pointed ceiling which is usually high and open. Vaulted ceilings require venting as well as insulation. One of the reasons for 2 vs a 1 gap is some vaulted ceilings can have a point source of air leakage like a recessed light where there is no ventilation help from all other sources. I m in the early stages of building an amazing workshop to showcase tools over at tool box buzz and shop projects here at hci.

When renovating an older home whose roof rafters are only 2x6 really 5 1 2 x 1 5 in dimension the available space for insulation and ventilation is limited therefore limiting the options for a combination of good under roof ventilation and high insulation r values in the cathedral ceiling. Thus each bay needs to have more. There is no insulation in the ceiling and i suspect little to no effective insulation in the 2x4 walls. This means that in a limited space such as a cathedral ceiling cellulose offers a much higher stated r value.

Cellulose offers much greater insulating power per inch and compared to fiberglass provides more insulating room because ventilation space is not required. Insulating cathedral ceilings can be quite challenging. I m looking for some suggestions in terms of insulating. I live in vermont so it s recommended to have around r50 insulation in the ceiling.

Here s how to use 3 layers of 2 inch polyiso foam board to meet code and keep your ne. Better than spray foam thermal break and relatively consistent r 30. If i retain the vaulted ceiling i ll need to furr out the 2x6 s to achieve the recommended r value. The new workshop will be located over my garage in an area that was framed using attic trusses when we built the new house.

The simple 6 12 gable roof is composed of actual 2x6 rafters 24 oc sheathed with 1 2 plywood and covered with asphalt shingles. Attic trusses typically have a sloping ceiling. 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. It provides an open airy look and feel to the room and they are often in demand among home buyers.

Old cottage cathedral ceiling i have a 50 year old seasonal cottage in a northern climate. Best insulation technique for 2x6 cathedral ceiling.