Laminate Flooring Installation: Avoiding Rippling and Open Joints

Laminate flooring installation has become increasingly common in home and commercial refurbishments. Yet rippling, open joints and premature wear remain frequent complaints, almost always caused by poor subfloor preparation, unsuitable material choices and careless workmanship. Understanding the process is therefore essential when questioning the installer, checking references and deciding whether it is better to repair the work or have it redone.

Which installation mistakes most often cause rippling and open joints?

Rippling commonly occurs where the subfloor is uneven, with hollows, high spots or other defects that were not put right before the planks were laid. Under these circumstances, the floor responds unevenly when walked on, creating movement that weakens the locking system, produces gaps and may even break the edges.

It is also common for laminate flooring to be fitted without sufficient clearance around walls, doors and door frames, overlooking the fact that the material expands as temperature and humidity change. Without this allowance, the planks are forced together, leading to ripples, creaking and open joints. The issue is made worse by underlay that is unsuitable or incompatible with damp areas, as this can encourage distortion and noise.

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

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

Where the subfloor has uneven areas, the user's weight is concentrated at just a few points, increasing mechanical strain on the locking joints and speeding up breakages, looseness and the feeling of a floor that is not firmly fitted. In high-traffic spaces, such as corridors and commercial rooms, this additional pressure shortens its service life and increases wear on the decorative layer.

Without expansion gaps, the system remains under constant stress, causing ongoing warping and rippling that make the joints more likely to separate, allow moisture in and even lead to mould beneath the floor. In rooms close to kitchens, bathrooms and balconies, this may cause swollen edges, unpleasant smells, stains and the need to replace part or all of the installation.

What are the most frequent laminate flooring installation mistakes, and how much do they cost to fix?

Certain issues repeatedly arise in laminate flooring refurbishments and, in many cases, putting them right can cost almost as much as, or even more than, the original installation. Knowing about these points makes it easier to judge whether it is worthwhile adjusting specific sections or whether starting again is the wiser option.

Among the most common mistakes with a direct impact on the consumer's budget are:

• Uneven subfloor, with holes, ripples and level changes that require levelling before refitting.
• No expansion clearance at walls, doors and door frames, resulting in pressure and floor bulging.
• Unsuitable underlay for the type of room, encouraging mould, excessive noise and swollen planks.
• Installation over a damp surface, without prior testing, increasing the likelihood of stains and unpleasant smells.
• Poor plank locking, leaving gaps and height differences that affect appearance, hygiene and walking comfort.
• No expansion joints across large areas, increasing the likelihood of rippling and joints opening.

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

A few precautions before work begins can prevent inconvenience and costly rework. These include checking the subfloor with a long metal straightedge to identify gaps and unevenness, and looking for signs of damp on walls, concrete slabs and areas near drains. A diligent installer will usually recommend a moisture test, explain the underlay options and discuss expansion joints in large rooms, demonstrating attention to the technical details.

It is also worth asking for references from projects that have been in use for more than a year and, where possible, visiting them to check for rippling, gaps and noise. Make sure everything is set out in a contract: the type of flooring and underlay, responsibility for preparing the subfloor, deadlines and the installation guarantee. Combining advance checks, clear questions and written records considerably reduces the risk of problems while protecting the investment and everyday comfort.