Interior Door Guide

: Add architectural interest by applying peel-and-stick trim or picture frame molding directly to a flat door slab. Fill any gaps with caulk or joint compound for a seamless finish.

For new installations, ensure you have the correct dimensions and orientation: Flat Panel Door Makeover | Upgrade Ugly Hollow Core Doors interior door

If you want to refresh existing flat-panel doors without replacing them, consider these popular DIY methods: : Add architectural interest by applying peel-and-stick trim