To install a pre-hung exterior door on concrete, you will first need to take out the old door, frame, and molding. Then, dry-fit the new door and mark the plumbing lines. After installing the door and the new framing, seal the new door in and insulate it as needed.
Remove old sliding glass doors and replace with French doors
Installing French Door
INSTALLING FRENCH DOORS (Does This Qualify as Hazing?)
Frequently Asked Questions
How do you install a Prehung exterior door on a concrete floor?
0:326:44How To Install An Exterior Door In A Concrete Wall - YouTubeYouTubeStart of suggested clipEnd of suggested clipI just drilled as a guide I'm going to use my hammer drill. And a masonry bit to make a hole in theMoreI just drilled as a guide I'm going to use my hammer drill. And a masonry bit to make a hole in the concrete. The easiest way that I found to do this is to insert your anchor.
How big of a gap do you need for French doors?
As with all door replacement schemes, before you purchase any French doors, you should carefully measure the area where you intend to install the doors. Any kit that you buy will have to fit into this gap, although most patio doors are cut to standardized sizes, so you should be able to find a kit that fits your gap.