TIL builders in Denver are framing load-bearing walls with 2x4s on 16 inch centers still. Heard an inspector telling a guy it's fine for single-story but I always thought 2x6s were safer for insulation depth.

I was at a supply yard picking up some joist hangers last Tuesday and overheard this inspector talking to a younger framer. The inspector said a lot of new houses here go with 2x4s to save money, but my old boss always insisted on 2x6s for the extra R-value. On one hand, it passes code and keeps costs down for the buyer. On the other hand, you're locking them into thin walls that can't hold proper insulation for Colorado winters. What's your rule of thumb for exterior walls - do you stick with code minimum or push for thicker framing?

2 comments

2 Comments

scott.grace14h ago

Stick with 2x6s every time for exterior walls here in Colorado. That extra inch and a half of insulation makes a real difference when the temps drop to single digits. Code minimum might pass but it's not doing the homeowner any favors on their heating bill down the road.

eric_carr13h ago

On the front range I'd still run 2x6 with R-21 batts, but up in the high country you really want that continuous exterior foam too or you still get condensation in the wall cavity.