Vaulted Ceiling Insulation Code

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.

Vaulted ceiling insulation code.

So some people go to crazy lengths trying to reach r 40 or r 50 in their cathedral ceiling while their money would have been better spent on better air sealing better windows more efficient heating system or increased wall. A cathedral ceiling is a sloping and pointed ceiling which is usually high and open. Retrofit or add on cathedral ceiling insulation questions answers set 2. It provides an open airy look and feel to the room and they are often in demand among home buyers.

When designing and building a cathedral ceiling using spray foam insulation you need to take into account code related to. Unvented cathedral ceiling code local codes based on irc 2009. Section r806 1 spray foam. Section r806 4 local codes based on irc 2012.

The 2015 irc requires r 49 insulation for ceilings with attic spaces. But codes rarely make the distinction between attics and cathedral ceilings in the minimum insulation requirements. Section r806 5 vented cathedral ceiling code local codes based on irc 2009. 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.

Pa302 1 ceilings with attic spaces n1102 2 1 r402 2 1. However there is an exception. Section r806 1 local codes based on irc 2012.