Feature Story

"Replacing Door Casing Trim: Step-by-Step Guide"

Replacing door casing trim is a straightforward DIY project that can significantly enhance the aesthetics of your room. This guide will walk you through the process, ensuring you achieve professional results with minimal effort.

Door Trim Makeover — Before & After DIY Transformation
Door Trim Makeover — Before & After DIY Transformation

Tools and Materials Needed

Door Casing Makeover - Sawdust 2 Stitches
Door Casing Makeover - Sawdust 2 Stitches

Before you begin, gather the following tools and materials:

  • Tape measure
  • Saw (hand saw, miter saw, or jigsaw)
  • Hammer
  • Nail set
  • Finishing nails (1-1.5 inches)
  • Casing (trim) - measure and purchase based on your door size
  • Caulk gun and paintable caulk
  • Paint or stain (matching your existing trim)
  • Paintbrushes or stain applicators
  • Safety glasses
  • Dust mask
a person is painting the wall with white paint and black trim on their bedroom door
a person is painting the wall with white paint and black trim on their bedroom door

Step-by-Step Guide

Measure and Cut the Trim

the corner of a room that has been stripped off with paint and chipping on it
the corner of a room that has been stripped off with paint and chipping on it

Start by measuring the width and height of your door opening. The trim will cover the gap between the drywall and the door frame, so measure from the edge of the door frame to the wall. Cut the trim pieces to size using your saw. Remember to account for the miter cuts at the corners.

Remove the Old Trim

Using a hammer and nail set, carefully remove the old trim. Start at one corner and work your way around the door. Be cautious not to damage the drywall or door frame. Once the nails are removed, the trim should pull off easily.

the words door trim and casing are shown
the words door trim and casing are shown

Install the New Trim

Begin by installing the top piece of trim. Apply a small bead of construction adhesive along the back edge to help secure it in place. Position the trim against the ceiling and door frame, ensuring it's level. Use finishing nails to secure it in place, driving the nails below the surface and using a nail set to countersink them.

Next, install the side pieces. Apply construction adhesive to the back edge and position the trim against the wall and door frame, ensuring it's plumb (vertical). Use finishing nails to secure it in place, again countersinking the nails.

Interior Door Trim Ideas: Simple DIY Upgrade with Big Impact
Interior Door Trim Ideas: Simple DIY Upgrade with Big Impact

For the bottom piece, you'll need to create a miter cut to fit around the door frame. Apply construction adhesive to the back edge and position the trim against the door frame and floor, ensuring it's level. Use finishing nails to secure it in place.

Fill Gaps and Caulk

four different shots of a living room and dining room with the words diy door casings the easy way
four different shots of a living room and dining room with the words diy door casings the easy way
Simple Door Trim = Instant Modern Upgrade!
Simple Door Trim = Instant Modern Upgrade!
The Easiest Door Trim
The Easiest Door Trim
a room with white walls and wood flooring that says 5 tips for replacing door trim & baseboards
a room with white walls and wood flooring that says 5 tips for replacing door trim & baseboards
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$39!! DIY DOOR AND TRIM MAKEOVER
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6 Tips for Perfect Trim on Doors, Windows and Base Moldings
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Dos & Don’ts for Perfect Trim DIY Installs
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the bottom and bottom side of a white door with an ad that says, add trim to doors
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French Door Makeover | Part Two - DIY Door Casing
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How to Replace Interior Doors–DIY
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How to Replace Door Trim on a Pre Hung Door - Trim Carpentry
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These Door Trim Ideas Instantly Made My Home Feel More Expensive — Try Them!
a white door with the words from flat diy door trim to fabulous
a white door with the words from flat diy door trim to fabulous
an easy budget update sign hanging on the wall in front of a mirror that says easy budget update
an easy budget update sign hanging on the wall in front of a mirror that says easy budget update
an open door with a metal handle on it
an open door with a metal handle on it
Panelling Perfect
Panelling Perfect

Use a nail set to countersink any remaining nail heads. Apply paintable caulk along the seams between the trim and the wall, ceiling, and floor. This will create a seamless, professional look and prevent drafts.

Paint or Stain the Trim

Once the caulk is dry, paint or stain the trim to match your existing trim. Use a paintbrush or stain applicator to apply an even coat, following the grain of the wood. Allow the paint or stain to dry according to the manufacturer's instructions.

Inspect Your Work

After the paint or stain has dried, inspect your work. Ensure the trim is securely attached, the gaps are filled, and the finish is even. If necessary, touch up any areas with additional paint or stain.

Replacing door casing trim is a simple way to update the look of your room. By following these steps, you'll achieve a professional result that enhances the overall aesthetic of your space. Happy DIYing!