New Doors: A Homeowner’s Guide to Replacing Interior or Exterior Doors

Did you know that we’ve been using doors for around 5,000 years?

Doors may have been around for millennia, but sadly they don’t last quite that long.

If your doors are getting old, it may be time to replace them with new doors.

Read on as we take a look at what you need to know about replacing interior or exterior doors.

Choose the Type of Door

Before you install a door, you need one to install! There are two main options.

Door Slab

A door slab is just the door itself. If your door frame is in sound, you may just want to replace the door and leave the frame in place.

Pre-Hung

A pre-hung door is a door that is already installed in the frame. You install the pre-hung door in one piece.

Fitting a New Door


Fitting a new door isn’t a job for a DIY novice; it requires a reasonable level of skill. If you’re not confident, you might want to seek professional help, such as from Sherhill Construction.

Remove the Old Door

The first step is to remove the old door. 

Take the old door off its hinges. Remove any molding around the frame, too.

Free Up and Remove the Old Door Frame

Next up you’ll need to remove the frame. 

There will be a few nails holding the frame in place; you may need to saw through these before you can remove the frame.

Prep the Opening

Once the frame is out, make sure that the opening is prepared for the new frame. 

You want to be sure that the opening is square; you might need to add in some plywood to ensure the opening will fit the frame perfectly.

Install the New Frame

Caulk around the opening, and then install the new frame. 

The plan is to set the door in place and then use shims to get it in exactly the right position.

Shim the Frame

Use shims to center the door exactly in place. You want to be sure then is an even gap all the way around the door. 

Once the frame is where you want it, secure it with screws or nails.

Seal the Space

Finally, you’ll need to cut the shims flush with the door. You can then fill the remaining gaps with expanding foam.

The door is now in place and you can make any final cosmetic finishing touches you wish.

Are You Ready for New Doors?

If you’re ready for new doors in your home, then we hope that this guide has given you some help in knowing how to install a door.

If you’re not confident with this level of DIY then there’s no harm in getting the professionals to do the job for you. It’s better to have the job done right, especially if you’re replacing an exterior door.

If you’re looking for more helpful content, then be sure to check out the rest of the site.