Unconditioned space / Discussions

What are the consequences of heat runs in exterior joist space wrapped in poly?

The builder on this 15 year old home ran the heat runs in the exterior joist space, he then insulated against the rim joist and under the heat runs, then wrapped from the mud sill to the underside of the plywood on the interior of the first joist and sealed the poly to the plywood with acoustical caulk, we will now spr...

Posted by Andrew Lee July 9, 2025 Delivery: radiant, forced-air and decentralized