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Step by Step Guide to Choosing, Installing and Replacing Internal Door Thresholds

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Our detailed step by step guide to installing and replacing internal door thresholds will ensure that your doorways are not only functional, but also look great.

Internal door thresholds may not battle with external elements as their exterior counterparts do, but they play an vital role in defining and separating rooms within your living space. Not only can they enhance the look of your interior, but they also contribute to the thermal insulation of your interior doors.  

However, these seemingly simple elements are not just strips of wood or other material. Installing or replacing an internal door threshold involves accuracy, the right tools, quality materials, and attention to detail.

Every detail matters, and understanding the steps you need to take can make a notable difference to the finished job.

How to choose the correct internal door threshold for the job

Choosing the correct internal door threshold is an essential step in the installation process. Internal door thresholds cover the gaps between a door and the floor, providing a seamless transition while also preventing dust, noise, and temperature from flowing between rooms. In essence, the right threshold strikes a balance between functional practicality and visual appeal in your home.  

You need to consider several factors such as material, design, and size when selecting a suitable internal threshold. Typically, internal door thresholds are made of materials like wood effect UPVC or metal. UPVC Wood effect is often preferred for its natural appeal and ability to match with other wooden interiors. Whereas, metals such as aluminium offer robust protection and are valued for their cost-effectiveness and easy maintenance.  

Design-wise, a flat threshold is often a good choice for internal doors as it provides a smooth and obstacle-free transition which is valuable for people with mobility issues. However, there are also raised designs that could serve as more of a statement piece. Remember to keep your home’s overall style in mind, ensuring that the threshold complements your space.  

Last but not least, accurate measurements are crucial. Measure the length and width of your door area where the threshold will be installed. For optimal functionality and to achieve the look you’re after, a threshold should fit perfectly without requiring too many adjustments.  

Overall, choosing the right internal door threshold involves careful consideration of these factors. Always weigh up your options and consider what best suits your project before making a decision. 

Installing and Replacing Internal Door Thresholds

Door thresholds are an essential yet often overlooked feature of your home. However, when they become worn or damaged, you may start to notice a lack of insulation or even irritating squeaky noises.

It’s at this point that you need to look into replacing your internal door thresholds. Fortunately, the process is relatively simple when armed with the right kit.

What tools will I need to replace an internal door threshold?

Before you start, you’ll need a few essential tools by your side to get the job done. Below is a list of items you’ll require: 

  • A sturdy measuring tape to ensure an accurate threshold fit
  • A screwdriver or a drill to both remove the old threshold and secure the new one
  • A pry bar or chisel, which can come in handy when prying off the old threshold
  • Safety equipment such as gloves and safety glasses to protect against any injuries
  • Lastly, you’ll need the new threshold itself, along with any screws and additional fittings needed for its installation

Remember, starting your project with the right tools will not only make the process smoother but also ensures a job well done. So now you have everything you need, let’s delve into the installation process.

Step 1: Measure and Purchase New Threshold 

First, measure the width of your door using a tape measure from jamb to jamb. Next, choose a suitable internal threshold that matches your measurements and compliments your interior. Remember, quality matters as much as looks, which is why we only sell top quality profiles on our website.

Step 2: Remove Old Threshold 

Next, it’s time to remove the old threshold. Start by cutting through the paint or finish along the seam between the threshold and the floor using a utility knife. Then, using a pry bar, gently lift the threshold out of its position. Be patient and work your way gracefully to avoid further damage. 

Step 3: Prepare the Doorway 

With the old threshold removed, you should now clean and prepare the doorway for your new threshold. Using a small brush or a vacuum cleaner, remove any debris, dust or remnants of the old threshold. 

Step 4: Install the New Threshold 

Now we’re getting to the exciting part – installing your new threshold! Using the same screw holes as your previous threshold, position your new one correctly and secure it with screws. It’s important to ensure that it’s even and level so as to not interfere with the door’s operation, or create a trip hazard. 

Step 5: Finish Up 

Finally, caulk the sides of the threshold to seal any gaps between it and the door frame or floor. This will help to insulate your home and prevent drafts. Once the caulk has dried, your door is ready to be used again as normal! 

And there you have it – you’ve successfully replaced your internal door threshold. As you can see, with the right tools and a bit of patience, there’s no need to hire a professional. So why not give it a try yourself?

For further guidance, information on tools or with help choosing your flooring profiles, our friendly team are only a phone call away, and are always happy to help on 01249 588599.


Hello there! Sham here, I'm the proud founder and owner of Cayrus World of Finishing, the UK's go-to expert for all things related to flooring finishing profiles. With a passion for design and a keen eye for detail, I've dedicated over 15 years to providing both commercial and domestic clients with top-notch flooring solutions. From the simplicity of door stops and skirting boards to the essential functionality of door thresholds and stair nosings, my team and I have it all covered. We even specialise in unique, flexible profiles for those bespoke projects that require a touch of creativity and innovation.

Running Cayrus World of Finishing as a family business means everything to me. It's not just about the products we sell; it's about the relationships we build and the spaces we help transform. My role primarily revolves around product development and operations, ensuring that we not only meet but exceed our customers' expectations. I take great pride in our ability to offer tailored services, design, and specifications that cater to individual needs, all while maintaining competitive prices.

Our journey has been one of constant learning and adaptation, driven by a commitment to excellence and a deep understanding of our clients' needs. Whether you're looking for the perfect finishing touch for your home or need comprehensive compliant solutions for a large-scale project, I'm here to ensure that your vision becomes a reality.
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