Laminate Flooring Installation: How to Avoid Ripples and Open Joints

Laminate flooring installation has become a go-to choice in both home and commercial refurbishments. Even so, ripples, open joints and premature wear remain frequent complaints-almost always linked to poor subfloor preparation, the wrong choice of materials and careless workmanship. For that reason, it helps to understand how the process should be done, so you can challenge the installer, check references and decide whether it is worth correcting the work or starting again.

Which installation mistakes most often cause ripples and open joints?

Rippling typically appears when the subfloor is not level, with dips, high spots or other imperfections that were not put right before the planks were laid. In that scenario the floor flexes unevenly underfoot, creating movement that weakens the click-lock connection, opens up gaps and can even snap the edges.

Another common error is fitting laminate without leaving enough expansion clearance at walls, doorways and door frames, forgetting that the material expands and contracts as temperature and humidity change. Without that perimeter gap, the boards compress against fixed points, leading to ripples, creaking and open joints. The issue is often made worse by using an unsuitable underlay-or one that is not compatible with damp-prone areas-which encourages distortion and noise.

Watch a video on the YouTube channel Oficina de Casa covering the essential precautions when laying floors and how to prevent ripples or open joints during a refurbishment:

How do these mistakes affect the durability and comfort of laminate flooring?

When the subfloor has level differences, the user’s weight ends up concentrated on a few points. That increases mechanical stress on the locking system, speeding up breakage, looseness and the feeling of a “floating” or unstable floor. In high-traffic spaces such as corridors and commercial rooms, the extra load shortens service life and intensifies wear on the decorative layer.

If expansion gaps are missing, the whole system stays under constant tension. This can cause warping and ongoing rippling, which then makes it easier for joints to disengage, for moisture to get in and even for mould to develop beneath the floor. In spaces near kitchens, bathrooms and balconies, the result can be swollen edges, unpleasant odours, staining and the need to replace part-or all-of the installation.

What are the most frequent errors and how much does it cost to fix them?

Certain issues show up again and again in laminate-floor refurbishments and, in many cases, putting them right can cost almost the same as-or even more than-the original installation. Knowing what to look for helps you judge whether it makes sense to adjust specific sections only, or whether it is smarter to redo everything from scratch.

Among the most common mistakes that directly affect what the customer pays are:

• Uneven subfloor, with holes, waves and steps that require levelling before reinstalling.
• No expansion clearance at walls, doors and door frames, creating pressure and lifting/bulging.
• Unsuitable underlay for the type of environment, which encourages mould, excessive noise and plank swelling.
• Installation over a damp surface, without prior testing, increasing the risk of stains and bad smells.
• Poor plank engagement, leaving gaps and lips that harm appearance, hygiene and walking comfort.
• Lack of expansion joints in large areas, raising the likelihood of ripples and joints opening.

How can you choose the right professional and avoid future problems?

A few checks before work begins can prevent frustration and rework. For example, examine the subfloor with a long metal straightedge to spot voids and level changes, and look for signs of moisture on walls, slabs and around areas near drains. A careful installer will usually recommend a moisture test, explain underlay options and talk through expansion joints in larger rooms-showing attention to the technical details.

It is also sensible to ask for references from projects that have been in use for more than a year, visit them where possible to look for ripples, gaps and noise, and put everything in writing: the flooring type, the underlay, who is responsible for subfloor preparation, timescales and the installation warranty. This mix of upfront checks, direct questions and written records greatly reduces the risk of problems, protecting your investment and day-to-day comfort.