Good day everyone,
While performing an audit and blower door test, we came across a french door (pics attached) that, of course, was hemorrhaging air. The homeowner also complained about insects getting in around the door (surprising, of course).
We think we can air seal the perimeter with good weatherstripping, but are at a total loss for what to do where the doors come together. Both sides are operational and used. The doors are fiberglass, so adding weatherstripping between them is not practical. We thought about using some v-stripping on both sides, but then we run into the same problem of how to attach it since adhesive would wear out and screws are impractical.
As you can see in the photos, the homeowner used foam tape, but the gap is simply too big and the adhesive not strong enough to handle the sheer forces of the doors opening and closing.
Any advice would be quite welcome.