✓ UK's Trusted Flooring Specialist
Common Mistakes When Laying Flooring (And How to Avoid Them)
• Kieran McGrath
Laying a new floor can be one of the most satisfying home improvements you'll make. Get it right and the results speak for themselves. Get it wrong, however, and you can be left with a floor that squeaks, buckles, gaps, or simply doesn't look the way you imagined.
The Wooden Floor Store has good news! As most flooring mistakes are entirely avoidable. Here are the most common ones we see, and what to do instead.
1. Not Letting the Flooring Acclimatise
This is one of the most overlooked steps in the entire process, and skipping it causes no end of problems.
Wood and wood-based flooring products are sensitive to temperature and humidity. When you bring new flooring into your home, it needs time to adjust to the conditions of the room before it's installed. If you skip this step and lay it straight away, the planks can expand or contract after fitting, leading to warping, buckling, or unsightly gaps between boards.
As a general rule, leave your flooring in the room where it will be installed for at least 48 hours before laying it. Some engineered wood products may need longer. Check the manufacturer's guidelines for the specific product you've chosen.
2. Failing to Prepare the Subfloor Properly
Your finished floor is only as good as what lies beneath it. A subfloor that's uneven, damp, or poorly prepared will cause problems no matter how high-quality your chosen flooring is.
Before laying anything, check the subfloor for:
- Levelness - Most flooring manufacturers specify a maximum tolerance, typically no more than 3mm variation over a 1.8m span. Use a long spirit level or straightedge to check, and use a self-levelling compound to correct any dips or high spots.
- Moisture - Excess moisture in a concrete subfloor is a leading cause of flooring failure. Use a moisture meter to test before you start, and apply a damp-proof membrane if needed.
- Stability - On timber subfloors, make sure there are no loose, squeaky, or springy boards. Screw down any that move before laying your new floor over the top.
Rushing past this stage is a false economy. Time spent on subfloor prep is never wasted.
3. Forgetting to Leave an Expansion Gap
Wood expands and contracts with changes in temperature and humidity throughout the year. If your flooring is laid tight against the walls or fixed obstacles, it has nowhere to go when it expands and will buckle upward.
Always leave an expansion gap around the perimeter of the room and around any fixed objects like door frames, pipes, and kitchen units. For most products, this is around 10-15mm, but check the manufacturer's instructions for your specific floor. The gap will be hidden by skirting boards or beading once the job is done, so it won't be visible in the finished result.
This applies to engineered wood and laminate in particular. LVT and SPC products are more dimensionally stable, but still benefit from a small perimeter gap.
4. Getting the Layout Wrong
Where you start laying your floor has a big impact on how the finished result looks. Many first-timers make the mistake of starting in a corner or against one wall without thinking through the overall layout first.
A few things to consider before you begin:
- Run the boards parallel to the longest wall in the room for the most natural, spacious look.
- Plan your starting point so that the last row of boards against the opposite wall isn't a very thin sliver. If it will be, adjust your starting position so both the first and last rows are roughly equal in width.
- Check your walls are actually square. In older properties especially, walls are rarely perfectly straight. Snapping a chalk line gives you a true reference point to work from rather than trusting the wall itself.
Taking 20 minutes to plan your layout before you start can save hours of frustration later.
5. Using the Wrong Underlay
Underlay isn't just about comfort underfoot. It plays a key role in insulation, sound reduction, and moisture protection. Using the wrong type, or skipping it entirely, can shorten the life of your floor and affect how it performs day to day.
A few common underlay mistakes:
- Using a thick underlay with click-lock flooring. Too much give beneath a floating floor puts stress on the locking joints and can cause them to fail over time. Most manufacturers recommend underlay no thicker than 3mm for click systems.
- Forgetting a moisture barrier on concrete subfloors. If your underlay doesn't include a built-in damp-proof layer, you'll need to add one separately before laying it.
- Doubling up on underlay. If your flooring comes with an attached underlay, don't add another layer on top. More is not better here.
Check your flooring manufacturer's recommendations and match your underlay accordingly.
6. Poor Staggering of Joints
For both practical and aesthetic reasons, the end joints between planks should be staggered from row to row. A pattern where joints line up in columns, known as "H-jointing," looks poor visually and also creates a structural weak point in the floor.
As a rule of thumb, aim for a minimum offset of 300mm between end joints in adjacent rows. Most flooring packs will include off-cuts that can be used to start alternate rows, helping you achieve a natural, randomised look.
7. Ignoring the Direction of Light
It's a small detail, but it makes a real difference. Laying boards perpendicular to your main light source, such as a window, will highlight every joint and imperfection. Laying them parallel to the light source creates a much smoother, more seamless appearance.
In most rooms, this means running boards away from the main window toward the opposite wall. It's worth standing in the room and thinking about where the light falls before you commit to a direction.
8. Not Buying Enough Flooring
Running out of flooring mid-job is a common and frustrating mistake. Even if you calculate the room area correctly, you need to account for wastage from cuts, off-cuts at the end of rows, and any boards that are damaged or need to be discarded.
The standard recommendation is to add 10% to your calculated area for a straightforward rectangular room with a simple parallel layout. For diagonal or herringbone patterns, allow 15% or more. It's also worth buying a few extra boards as spares, since matching a discontinued product later can be extremely difficult.
9. Rushing the Finishing Details
The installation itself is only part of the job. How the floor is finished around the edges, doorways, and transitions makes a huge difference to the overall look.
Common finishing mistakes include:
- Leaving gaps between skirting and flooring that are too wide or inconsistent
- Not undercutting door frames so the flooring slides cleanly underneath
- Using the wrong transition strip between rooms or floor types
- Forgetting to seal around pipes or other penetrations in wet areas
Take your time with the finishing details. They're often what separates a floor that looks professionally installed from one that doesn't.
10. Not Reading the Installation Instructions
Every flooring product is different. Manufacturer instructions exist for a reason, and ignoring them can affect both the performance of your floor and the validity of any warranty.
Before you start, read the full installation guide for your specific product. Pay particular attention to any requirements around subfloor conditions, expansion gaps, adhesive type, and acclimatisation. If anything is unclear, speak to a flooring specialist before you begin rather than after something goes wrong.
Need Help Choosing or Fitting Your Floor?
At The Wooden Floor Store, our team is on hand to help you get it right from the start. Whether you're buying online or visiting one of our showrooms across Scotland, Northern Ireland, and England, we can advise on the right product for your room, how much to order, and what to watch out for during installation.