Skip to Content

How To Fix Gaps In Door Trim

If you've ever looked closely at your door trim, you may have noticed gaps between the pieces. It can be a mess, but it's also a problem because it leaves your home vulnerable to drafts and insulation loss. Luckily, we researched this issue, and it's an easy fix!

Disclosure: We may get commissions for purchases made through links in this post.

Depending on the cause of the door trim gap, there are a few different ways to fix it.

  • If the door trim was not correctly installed, the best way to fix it is to remove the trim and reinstall it. This time, make sure to use proper techniques and secure the trim to the wall with screws or nails.
  • If the door trim gaps are due to expansion and contraction, the best way to fix them is to use wood filler and caulk. Caulk is a flexible material that will expand and contract with the door trim, creating a tight seal.

To learn more about solving gaps in the door trim, keep reading for step-by-step instructions. You can also review below the common causes of cracks and spaces along door trims and how to prevent them.

man using a circular saw for cutting wood door construction and home renovation, repair tools - How To Fix Gaps In Door Trim

What are the most common causes of door trim gaps? 

3d illustration. Empty room with an open door to a beige modern bedroom.

One of the most frustrating things about owning a home is dealing with door trim gaps. Not only are they unsightly, but they can also let in drafts and pests. Fortunately, there are a few simple ways to fix this problem.

The most common cause of door trim gaps is improper installation. If the door trim is not properly secured to the wall, it will eventually start to pull away, creating a gap.

Another common cause of door trim gaps is expansion and contraction. As temperatures change, wood and other materials will expand and contract, causing the trim to move slightly. It can be especially problematic in areas with extreme temperatures.

Finally, door trim gaps can also be caused by settling. As houses settle over time, the door trim may become loose, creating a gap.

Is it difficult to fix a gap in the door trim?

Any homeowner knows that there are a million little things that need to be done around the house in order to keep everything in tip-top shape. From fixing a loose doorknob to painting the trim, these tasks may seem small, but they can make a big difference in the overall appearance of your home.

One repair job that often comes up is fixing a gap in the door trim. While this may seem like a daunting task, it is actually relatively easy to do with a few simple tools. All you need is:

Putty knife

Get handy with a putty knife. - View it on Amazon.

Nails and screws

Get a complete set of nails and screws. - See it on Amazon.

Wood filler or caulk

Fix your door trim with a wood filler. - Check it on Amazon.

Paint or stain

Never miss out on paint for your door and door trim. - View it on Amazon.

And that's it; you can now start fixing the gap! With a little time and effort, you can easily fix door trim gaps and restore your doors to their original beauty.

Steps on Fixing the Gap in Door Trim

Outdoor portraits of young man cutting painting and repairing wooden boards.

Step 1: Identify the source of the gap

Is the gap due to a faulty installation? Or has the trim become loose over time? Once you have determined the cause of the gap, you can take steps to fix it.

If the problem is a loose trim, you can simply use a screwdriver or hammer to drive the nails back into place. If the gap is due to an installation issue, you may need to remove the trim and start again from scratch.

Lastly, if it is due to the weather conditions that resulted in a gap, you might add fillers in between and proceed to Step 2.

Step 2: Fix the trim using a putty knife or wood filler like caulk

Remove any loose paint or chipped wood from the area. Next, use a putty knife or wood filler to fill in the gap.

If using caulk, apply it generously and smooth it out with your finger. Just apply a bead of caulk around the perimeter of the door trim and smooth it out with your finger. It will create a weatherproof seal that will keep drafts and insects out. Let the filler dry completely.

For larger gaps, use a thin piece of wood or trim to bridge the gap. Secure the piece in place with nails or screws, then apply caulk or around the edges.

You can also use a generous amount of construction adhesive to both the door trim and the wall, then press the trim into place. Hold it there for a few minutes to allow the adhesive to set, then add screws or nails for extra security.

Step 3: Sand down any excess filler until it's flush with the door trim

Once the filler has dried, sand it down until it is flush with the rest of the trim. It would help make the area smoother, making it better for the next step.

Step 4: Paint or stain the door trim to match your home's exterior design

With the use of paint, you can hide the caulk or wood filler you added. It would even look like a brand new door! Afterward, simply enjoy your beautiful, seamless door trim!

What type of caulk can you use for your door trim?

If you're looking for a durable, long-lasting caulk to use on your door trim, latex caulk is a great option. Latex caulk is made of rubber and vinyl, making it flexible and withstands temperature changes. It's also easy to apply and clean up, making it a good choice for do-it-yourself projects.

Latex caulk is available in different colors to match your trim, and you can paint it over once it's dry. When applied correctly, latex caulk will last for years, providing a smooth, professional-looking finish to your door trim.

Apply latex caulk to your door trim. - Check it on Amazon.

Are there any dangers if you didn't fix door trim gaps?

man using a circular saw for cutting wood door construction and home renovation, repair tools - How To Fix Gaps In Door Trim

On the surface, door trim gaps may not seem like a big deal. But then, if left unaddressed, they can actually lead to a number of problems. For one thing, door trim gaps can allow drafts and pests into your home.

In addition, they can also cause doors to stick or rub against the frame, making them difficult to open and close. Over time, this can damage both the door and the trim itself. In some cases, it may even cause the door to come off its hinges entirely.

Therefore, it is vital to fix door trim gaps as soon as you notice them. Not only will this help to keep your home more comfortable and secure, but it will also prevent long-term damage to your doors and trim.

How can you prevent door trim gaps from happening in the first place? 

An wooden door being cut by a saw manually.

When it comes to door trim gaps, prevention is key. There are a few things you can do to ensure that your door trim stays snug against the wall, without unsightly gaps.

  1. One of the most important things is to make sure that the door trim is properly designed. The trim should be level with the door, and there should be no gaps between the two. If there are any gaps, you should fill them with caulk or another sealant right away.
  2. Another thing to keep in mind is that door trim can expand and contract with changes in temperature and humidity. It means that it's essential to allow expansion joints when installing the trim. It will help prevent the trim from cracking or breaking as it expands and contracts.

By following these simple tips, you can help prevent door trim gaps from happening in the first place. And if they do happen, you now know how to fix them quickly and easily!

Final Thoughts

The door trim is often one of the most neglected areas of a home. However, it can be an easy and affordable way to improve your home’s appearance. Simply follow the tips indicated above and start trying them at home. As a result, it would make your door into a finished look while it can fully serve its entire purpose.

To learn more about different ways to properly maintain your doors, check out the following tips below:

Should Door Handles And Knobs Match Throughout The House?

How Much Space Between Door And Floor? [Both Interior And Exterior Doors]

How Much Space Should You Have Between A Door And The Frame?