Cathedral Ceiling Insulation R Value

Insulating a vaulted ceiling is similar to insulating exterior walls with one notable difference.
Cathedral ceiling insulation r value. Foam board insulation would be a more economical especially if you are supplying the labor see photo. These batts meet the energy saving requirements of today s codes without requiring changes in construction. Recommended home insulation r values. R value insulation receives a rating.
Foil faced iso board can be cost effective insulation for finished attics and cathedral ceilings. The higher the r value the greater the insulation performance. Insulation level are specified by r value. Vaulted ceilings require venting as well as insulation.
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. In most cases however insulation will not help prevent moisture. High density cathedral ceiling batts allow an airspace between the insulation and roof deck for ventilation. The higher the r value the better the thermal performance of the insulation.
The table below shows what levels of insulation are cost effective for different climates and. Pa302 2 ceilings without attic spaces n1102 2 2 r402 2 2. R value is a measure of insulation s ability to resist heat traveling through it. 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.
These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. Spray foam is a very expensive option however. It provides an open airy look and feel to the room and they are often in demand among home buyers. 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.
A cathedral ceiling is a sloping and pointed ceiling which is usually high and open. R value measures how well certain building insulation materials can resist heat.