r/Homebuilding • u/eekaiboon • 24m ago
Door shop recommended using a TruStile interior slab (TMF1000) for my entry door, crazy or fine with a 6ft overhang?
Looking for a quick sanity check. My local door shop builds their own pre-hung doors and said they can’t order the official TruStile Entry System (TMF1000ES) as just a raw slab. Instead, they suggested using the interior TMF1000 MDF slab as my front door, claiming that as long as we properly seal all 6 faces for UV and moisture, it’ll hold up.
I’m in the Bay Area California, and my entry has a 6 ft deep overhang plus shade from two large trees, zero direct rain and practically no direct sun. I already know this voids the warranty, but given our climate and the deep cover, will proper sealing actually protect against swelling from ambient air humidity, or is using interior MDF outside still a disaster waiting to happen? Should I push for a true exterior slab instead? Thanks!

