0 Helpful?

How do published commercial and residential code requirements for combinations of continuous insulation and stud cavity insulation relate to in-wall condensation concerns?

The 2012 IECC includes minimum requirements for continuous insulation in combination with stud cavity insulation for wood stud walls. The requirements for these combinations differ between commercial and residential buildings. The required R values for continuous insulation are higher for residential buildings than for commercial. Considering cold climate applications, how do these requirements relate to in-wall condensation concerns?

Asked by Albert Russell
Posted May 13, 2014 3:16 PM ET

Tags:

1 Answer

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

Albert,
Q. "Considering cold climate applications, how do these requirements relate to in-wall condensation concerns?"

A. They don't. Following minimum code requirements is no guarantee that you won't have a wet wall. These are minimum requirements, not optimal recommendations. To stay out of trouble, you sometimes have to exceed minimum code requirements for minimum foam thickness.

For more information, see Calculating the Minimum Thickness of Rigid Foam Sheathing.

Answered by Martin Holladay
Posted May 13, 2014 4:03 PM ET

Other Questions in Energy efficiency and durability

Need sizing advice on a minisplit unit

In General questions | Asked by aypues | Mar 16, 17

Cape Cod Attic Cellulose Machine

In Green products and materials | Asked by scifijock | Apr 25, 17

Housewrap under rigid foam AND taped rigid foam at windows

In Green building techniques | Asked by Inger Peters | Apr 17, 17

Insulating a corrugated metal floor deck

In General questions | Asked by P Stone | Apr 25, 17

1974 construction retrofit

In Energy efficiency and durability | Asked by Mark Walker | Apr 25, 17
Register for a free account and join the conversation


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