Retaining heat at a garage door; part 2.a.07x
Fairbanks, AK, zone 8. This is an iteration of a design I asked about last year; different foundation system, somewhat different ramp. I looked for that thread to see exactly what was said, but could not find it, so I apologize if old ground is being dug up again.
I am still struggling with getting some kind of heat retention at a garage door, a desire that may be nearly pointless given that garage doors notoriously leak. (That said, I was sitting inside my neighbor’s the other day at 20 below, and could not detect any leakage by hand, fwiw. 2 story, non-super-tight house.)
Picture one shows a cross section of the proposed foundation and slab in the middle of the garage door. My idea is to build a wooden ramp (2 per vehicle) into the garage and have some measure of thermal break at the slab. Picture 2 is a top view. There will be radon, StegoWrap, gravel, etc, so those issues are not of concern right now. The concerns are this: (1) Is it even worth dinking around getting a thermal break between the ramps and the slab? (2) Are there obvious improvements to this?
BTW: I’ve looked at the psi on the foam under the ramps that a one-ton pickup will generate, and at 30 I think 100 psi XPS will not creep…. for a while. The whole house will have the same foam/stem wall setup, sans the notch for the ramps.
There are obvious alternatives, including running the concrete out farther and having less psi on the foam from the truck, etc, etc.
As always, any comments or suggestions are surely welcome.
GBA Detail Library
A collection of one thousand construction details organized by climate and house part