Insulating A 2x6 Vaulted Ceiling

A cathedral ceiling is a sloping and pointed ceiling which is usually high and open.

Insulating a 2x6 vaulted ceiling.

Vaulted ceilings require venting as well as insulation. This means that in a limited space such as a cathedral ceiling cellulose offers a much higher stated 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. Cellulose offers much greater insulating power per inch and compared to fiberglass provides more insulating room because ventilation space is not required.

Thus each bay needs to have more. Insulating a vaulted ceiling is similar to insulating exterior walls with one notable difference. There is no insulation in the ceiling and i suspect little to no effective insulation in the 2x4 walls. R value insulation receives a rating.

Old cottage cathedral ceiling i have a 50 year old seasonal cottage in a northern climate. 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. 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. The simple 6 12 gable roof is composed of actual 2x6 rafters 24 oc sheathed with 1 2 plywood and covered with asphalt shingles.

It provides an open airy look and feel to the room and they are often in demand among home buyers. 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. Given that many homes survive with far less including those skimpy. Insulating cathedral ceilings can be quite challenging.

Here s how to use 3 layers of 2 inch polyiso foam board to meet code and keep your ne. If i retain the vaulted ceiling i ll need to furr out the 2x6 s to achieve the recommended r value. Better than spray foam thermal break and relatively consistent r 30. I m looking for some suggestions in terms of insulating.

The garage is 12x20 and has about a 27 degree pitch in the roof with 2x6s as rafters. Best insulation technique for 2x6 cathedral ceiling.