Best Way To Insulate A 2x6 Cathedral Ceiling

What is the best way to insulate a cathedral ceiling with exposed 2x6 t g boards above the rafters.

Best way to insulate a 2x6 cathedral ceiling.

One of the best options would be spray foam insulation here s why. Best insulation technique for 2x6 cathedral ceiling i ve just finished tearing out a very poorly done finished attic. 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. What s the best way to insulate over an exposed 2x6 tongue and groove cathedral ceiling on a log house in colorado.

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. 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. A how to on installing certainteed s fiberglass insulation batts into attic and cathedral ceiling applications. A cathedral ceiling is often difficult to insulate as they leave very little room for ventilation which is needed to keep the insulation dry.

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. 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. 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.

It s a roughly 30x24 space with a 45deg roof built of 16ft 2x6 spaced 16 oc. Some have suggested using sips but others have advised that because this particular roof is cut up with valleys and dormers i would lose the labor savings associated with sips and end up with a very expensive roof. It is also one of the most expensive and most building inspectors will not allow it to be left uncovered for fire code reasons. I m in a 6 000 degree day climate.