Vaulted Ceiling Insulation Code

Bernice from midland ontario wants to know how to get more insulation into her vaulted or cathedral ceiling the common problem with structures like this that we call compact roofs is that there is not usually enough space for a lot of insulation and a lot of ventilation.

Vaulted ceiling insulation code. How to install fiberglass insulation in vaulted ceilings. Unvented cathedral ceiling code local codes based on irc 2009. This article series gives suggestions for insulating cathedral ceilings on older homes providing under roof ventilation for cathedral ceilings while obtaining higher insulation values or r values for these areas. In fact when the only space you have is that left by a 2x8 or even a 2x10 you really can t do a perfect job of both.

R 38 shall be deemed to satisfy the requirement for r 49 wherever the full height of uncompressed r 38 insulation extends over the wall top plate at the eaves. Section r806 1 local codes based on irc 2012. Retrofit or add on cathedral ceiling insulation questions answers set 2. Section r806 4 local codes based on irc 2012.

Building codes require a minimum amount of insulation in ceilings and exterior walls to help a house maintain consistent temperature. The 2015 irc requires r 49 insulation for ceilings with attic spaces. However there is an exception. Pa302 1 ceilings with attic spaces n1102 2 1 r402 2 1.

Section r806 5 vented cathedral ceiling code local codes based on irc 2009. But codes rarely make the distinction between attics and cathedral ceilings in the minimum insulation requirements.