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Building a house on piers

So if I am building a house on piers (zone 5) based on 2012 IECC, the ceiling has R-49, the floor has R-30 (or minimum 19), and the walls have R-20.

Am I missing something here? If heat seeks cold in any direction, would it not make sense to have the same level of insulation on all sides?

I have never really understood why, if a home is air sealed properly and tight, it is more beneficial to have R-49 in the ceiling and not the walls and floor. Or is this just based on a what's practical approach? Suppose I answered my own question.

Asked by primitivelamps
Posted Apr 24, 2013 8:02 PM ET
Edited Apr 25, 2013 4:38 AM ET

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2 Answers

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1.

Right.

Answered by DancingDan
Posted Apr 24, 2013 8:57 PM ET

2.

Terry,
As you guessed, it's easier and cheaper to add deep insulation to a ceiling than to a floor, and it's easier and cheaper to add deep insulation to a floor than to a wall. These facts influenced code requirements for minimum R-values.

Fortunately, you are free to exceed minimum R-value regulations.

Answered by user-756436
Posted Apr 25, 2013 4:09 AM ET

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