Cathedral Ceiling Insulation R Value

Insulation level are specified by r value.

Cathedral ceiling insulation r value.

R value measures how well certain building insulation materials can resist heat. 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. In most cases however insulation will not help prevent moisture. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.

Foam board insulation would be a more economical especially if you are supplying the labor see photo. Know exactly how much you need with our project calculators. These batts meet the energy saving requirements of today s codes without requiring changes in construction. Foil faced iso board can be cost effective insulation for finished attics and cathedral ceilings.

High density cathedral ceiling batts allow an airspace between the insulation and roof deck for ventilation. High density sidewall batts are available in sizes to fit standard construction without loss of r value due to compression. Where the design of the roof ceiling assembly does not allow sufficient space for the required insulation such as cathedral ceilings the minimum required insulation for such roof ceiling assemblies shall be r 30. The higher the r value the greater the insulation performance.

When determining how much insulation you need don t guesstimate calculate. Insulating a vaulted ceiling is similar to insulating exterior walls with one notable difference. A cathedral ceiling is a sloping and pointed ceiling which is usually high and open. R value is a measure of insulation s ability to resist heat traveling through it.

Spray foam is a very expensive option however. Find your zone on the map and then use the above insulation r value chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces. The table below shows what levels of insulation are cost effective for different climates and. Vaulted ceilings require venting as well as insulation.

It provides an open airy look and feel to the room and they are often in demand among home buyers. Recommended home insulation r values.