Insulated framing lumber
Back in the day, we used to sandwich a piece of rigid insulation inside
headers in exterior walls. That was good practice, but it didn't address
the thermal bridging occurring at every other framing member. This does.
Framing lumber with a longitudinal thermal break seems like a great
idea. Has anyone out there used it? If so, please drop a line with your
impressions. --Bruce D. Snider