✓ UK's Trusted Flooring Specialist
Do You Need Expansion Gaps? Flooring Installation Explained Simply
• Kieran McGrath
If you are installing a new floor, one detail you cannot afford to overlook is the expansion gap. It might seem small, but getting this wrong can lead to lifting, warping, and costly fixes later on.
The Wooden Floor Store is here to make it simple to understand why this matters and to save you the headache of reinstalling in the future.
What Is an Expansion Gap?
An expansion gap is a small space left around the edges of your flooring. This gap allows the floor to expand and contract naturally with changes in temperature and humidity.
Without it, the boards have nowhere to move, which can cause the floor to push against walls and lift in the middle.
Why Expansion Gaps Are Important
All floating floors expand and contract over time. This includes:
Even waterproof flooring needs room to move.
If you skip expansion gaps, you risk:
- buckling or peaking boards
- gaps forming between planks
- damage to locking systems
- voiding your warranty
It is one of the most common installation mistakes.
How Much Expansion Gap Do You Need?
As a general rule, most flooring requires a gap of:
- 8mm to 12mm around the perimeter of the room
This includes:
- walls
- door frames
- pipes and fixed objects
- kitchen units and islands
Always check the manufacturer’s guidelines, as some products may vary slightly.
Where Should Expansion Gaps Be Left?
Expansion gaps should be left anywhere the flooring meets a fixed surface.
This includes:
- around the edges of the room
- at doorways and transitions
- around radiator pipes
- against staircases and fixed furniture
If you are fitting flooring across large areas, you may also need expansion breaks between rooms.
What Happens If You Do Not Leave a Gap?
Skipping expansion gaps can cause serious problems, often within weeks or months.
Common issues include:
- the floor lifting in the centre
- boards pushing against each other
- visible damage to joints and edges
In most cases, the only fix is to lift the floor and reinstall it correctly.
How to Maintain the Expansion Gap During Installation
To keep your spacing consistent, use simple tools like spacers.
Shop installation essentials here:
https://thewoodenfloorstore.com/collections/accessories
Spacers help you:
- keep a uniform gap around the room
- install faster and more accurately
- avoid mistakes that lead to movement issues
How to Cover Expansion Gaps
The good news is expansion gaps are not visible once your floor is finished.
They are covered using:
- Scotia or beading
- Skirting boards
- Door bars and thresholds
These give your floor a clean, professional finish while still allowing movement underneath.
Do Glued Floors Need Expansion Gaps?
Even if your flooring is glued down, some level of expansion allowance is still required.
However, the requirements may differ depending on the product and installation method. Always follow the manufacturer’s instructions to avoid issues.
Final Thoughts
Expansion gaps might seem like a small detail, but they play a big role in how your floor performs over time.
Leaving the correct gap ensures your flooring can move naturally, preventing damage and keeping it looking its best for years to come.
If you are unsure about installation or which products you need, our team is always here to help you get it right first time. Please get in touch with any queries you may have: info@thewoodenfloorstore.com.