How to Choose the Right Door Threshold for Your Floor
Updated June 2026 | MW Profiles Team
If you've ever finished laying a floor and then stood in the doorway thinking "this still doesn't look right", you're not alone.
Doorways are where most problems show up. Gaps, uneven levels, rough edges or transitions that just don't look clean.
That's when questions start — what door threshold do I need?, how do I join two different floors?, what if the floor levels don't match?
A well-chosen door threshold fixes all of that. It covers the gap, protects the edges and makes everything look finished. This guide explains what a threshold is, where it should sit, the types and sizes available, and how to fit it.
Find the full range of door thresholds here
What is a door threshold and why it matters
A door threshold is the strip that sits in the doorway and connects two floors where they meet. You may also hear it called a threshold strip, door bar, floor bar or transition strip — and the "step" you feel underfoot in a doorway is the threshold.
Its job is simple but important. It:
- Covers the gap between two floors
- Protects the exposed edges of each floor
- Stops flooring lifting or fraying over time
- Improves safety by smoothing the transition
Without one, even a well-laid floor can look unfinished — and the open edges wear far quicker.
Where should a door threshold sit in the doorway?
As a general rule, the threshold should sit directly under the centre of the door, so it's hidden when the door is closed and the join lines up neatly from both rooms.
This keeps each room's flooring tidy up to the doorway, means the strip isn't visible from either side when the door is shut, and gives a clean line whichever way the door opens. If you're matching two different floor finishes, centring the threshold under the closed door is almost always the cleanest look.
Different floor levels – the biggest problem
This is where most people get stuck.
If one floor is higher than the other, you can't just use a flat trim. You need something that handles the height difference properly.
This is where ramp door thresholds come in.
- They smooth out height differences
- Reduce trip hazards
- Make transitions look clean
If your floors are uneven, always measure the height difference first — it decides whether a flat or ramp profile is right.
Types of door thresholds
Flat thresholds (same level floors)
Used when both floors finish at the same height. They give a clean, simple bridge across the join and are the most common choice for two hard floors of equal thickness — for example laminate meeting laminate, or tile meeting tile.
Ramp thresholds (different levels)
Best for uneven floors where one side is higher than the other. The sloped profile creates a smooth transition instead of a sharp step, which looks tidier and is much safer underfoot.
Multi-purpose thresholds
Designed to work across different materials and small height changes — ideal where laminate meets tile, vinyl meets carpet, or wood meets stone. If you're joining two different floor types, a multi-purpose profile usually gives the most forgiving fit.
Door threshold sizes
Thresholds are described by their width (how much of the join they cover) and their length (to suit the doorway). Most standard doorways are covered by a single length, with common options including 0.9 m, 1 m and longer bars for wider openings.
When choosing a size, check two things: the width of the gap you need to cover, and the height difference between the two floors. A slightly wider profile is the safer choice if your join is uneven or the gap is larger than expected.
Installation methods – what works best?
There are a few ways to install a threshold, depending on your setup.
Self-adhesive
Quick and easy. Ideal for lighter use areas and a fast, no-mess finish.
Adhesive fixing
Clean finish with no visible screws. A good middle ground for most rooms.
Screw fixing (most secure)
Best for high-traffic areas. Strong and long-lasting, and it won't work loose over time.
Style also matters
It's not just about function. The threshold should also match your floor and overall look.
You can go for:
- Wood-effect finishes
- Classic aluminium
- Modern minimal designs
The right choice should blend in, not stand out for the wrong reasons.
Common mistakes to avoid
- Choosing the wrong type for your floor levels (flat where you needed a ramp)
- Not measuring the gap and height difference properly
- Using a weak fixing method in busy areas
- Ignoring the final look and finish
Frequently Asked Questions
What is a door threshold?
A door threshold is the strip fitted in a doorway that bridges and finishes the join between two floors. It covers the gap, protects the floor edges and gives a clean, safe transition between rooms.
Where should a door threshold sit in the doorway?
Centred directly under the door, so it's hidden when the door is closed and lines up neatly from both rooms.
How do I join laminate and tile?
Use a multi-purpose threshold designed for different materials and small height changes between the two floors.
What if my floors are uneven?
Use a ramp threshold that compensates for the height difference, giving a smooth slope instead of a sharp step.
What size door threshold do I need?
Match the width to the gap you're covering and pick a length to suit the doorway. Common lengths include 0.9 m and 1 m. If the join is uneven, go slightly wider.
What types of door threshold are there?
The main types are flat (for level floors), ramp (for different levels) and multi-purpose (for joining different materials).
Can I use a door threshold with vinyl plank flooring?
Yes. Choose a flat or multi-purpose profile sized to suit the thickness of your vinyl plank and the floor it meets.
Do I need screws?
Not always — self-adhesive and adhesive options work well in lighter areas. For busy doorways, screw fixing is the most durable choice.
What is the difference between a flat and a ramp threshold?
A flat threshold bridges two floors at the same height; a ramp threshold slopes to bridge floors at different heights.
Final thoughts
A door threshold is one of those details that makes everything look finished.
It protects your floor, improves safety and gives you a clean transition between rooms. Choose flat for level floors, ramp for different heights, and multi-purpose where two materials meet.
If you're doing flooring, it's something worth getting right from the start.
Door Threshold Types
