0 Helpful?

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 terry grube
Posted Apr 24, 2013 8:02 PM ET
Edited Apr 25, 2013 4:38 AM ET

Tags:

2 Answers

Select your preferred way to display the comments and click "Save settings" to activate your changes.
1.

Right.

Answered by Dan Kolbert
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 Martin Holladay, GBA Advisor
Posted Apr 25, 2013 4:09 AM ET

Other Questions in Energy efficiency and durability

I recently had a metal roof installed on my house

In General questions | Asked by Linda DuBois | Dec 10, 16

I need insulation help in Baltimore

In Energy efficiency and durability | Asked by David Soderblom | Dec 10, 16

Incorrect plumbing joint fix for basement bathroom install

In GBA Pro help | Asked by Mike Tew | Dec 10, 16

Uninsulated slab and hardwood flooring

In Energy efficiency and durability | Asked by Brian Greene | Dec 9, 16

I'm not able to add an article to my GBA project

In General questions | Asked by Kris Burkett | Dec 10, 16
Register for a free account and join the conversation


Get a free account and join the conversation!
Become a GBA PRO!