Views: 0 Author: Site Editor Publish Time: 2026-05-09 Origin: Site
When people talk about flooring performance, they often focus on surface appearance, wear layer, waterproof level or color design. But in actual practice, many flooring problems are NOT caused by the décor layer itself. More often, the issue begins with dimensional stability.
For laminate flooring and click-lock LVT flooring, three terms appear repeatedly during production, installation and after-sales discussions:
Hot pressing, Acclimatization and Expansion gap.
These three concepts belong to different stages of the flooring process, but they are closely connected to each other. If one step is ignored, the flooring may later develop problems such as joint peaking, edge lifting, squeaking, gapping or deformation.
In this article, we will go through these three terms in a practical way and explain how they function together in real flooring applications.
Hot pressing is one of the essential production procedures of laminate flooring.
In simple words, laminate flooring is not a naturally grown material. It is an engineered product made by combining several layers together under extremely high temperature and pressure.
A standard laminate flooring plank usually includes:
Wear layer
Decorative paper
HDF core board
Balancing layer
During production, these layers are compressed through hot pressing machines. The pressure and temperature bond the materials into one stable plank structure.
This process is very different from the natural environment where the flooring will finally be installed.
Inside the factory, the pressing conditions are highly controlled:
stable temperature
stable humidity
calibrated pressure
controlled cooling time
After the flooring leaves the production line, however, it enters warehouses, containers, construction sites and residential spaces where the environment constantly changes.
This is why dimensional movement can never be completely eliminated, even with properly manufactured flooring.
After production and transportation, flooring materials need time to adapt to the actual installation environment. This process is called Acclimatization.
For laminate flooring and many click-lock LVT products, installers normally leave the cartons inside the room for a certain period before installation. Depending on product type and local climate, this may range from 24 to 72 hours.
The reason is simple.
A flooring plank may travel through:
humid coastal regions
cold warehouses
hot containers
air-conditioned rooms
dry winter environments
The temperature and humidity difference can slightly affect the dimensions of the planks.
Even waterproof flooring products may still experience minor expansion and contraction. Waterproof does not mean the material becomes completely immune to environmental change.
For laminate flooring especially, the HDF core remains sensitive to moisture variation to some degree. If installation starts immediately after delivery, the planks may continue adjusting after locking together on the floor.
→You may refer to the key specification "Thickness Sweel" in Darekaou Laminate Flooring Test report:
Laminate flooring test report - SGS.pdf
That is when problems can begin.
In practical projects, skipping acclimatization often leads to:
joint stress
clicking noise
edge peaking
locking system tension
visible gaps later on
For LVT flooring, the movement is usually smaller compared with laminate flooring, but acclimatization is still recommended, especially in projects with large temperature differences.
Many customers assume that once a flooring product passes stability testing, expansion problems completely disappear.
In reality, flooring materials only become more resistant to environmental change — NOT entirely free from it.
Even after proper hot pressing and acclimatization, flooring still experiences small dimensional movement.
This is normal.
The flooring may:
slightly expand during humid seasons
contract during dry seasons
react to floor heating systems
respond to direct sunlight exposure near windows
This is particularly noticeable in floating installation systems such as click laminate flooring and click LVT flooring.
Since the floor is not glued tightly to the subfloor, the entire flooring surface acts almost like one connected sheet. Small movements from hundreds of planks accumulate together across the room.
That is exactly why expansion gaps are necessary.
An expansion gap is the small space intentionally left between the flooring and surrounding objects such as:
walls
door frames
cabinets
columns
stairs
This gap allows the floor to slightly expand and contract without squeezing against hard obstacles.
If installers place the flooring too tightly against the wall, pressure starts building inside the floor system once expansion occurs.
Eventually the floor may:
peak upward
bend near joints
unlock at connections
produce noise during walking
develop visible deformation
In severe situations, the flooring can literally push itself upward from the center of the room.
Many installation complaints actually come from insufficient expansion gaps rather than from the flooring quality itself.
Experienced flooring installers usually pay significant attention to room edges during installation.
To ordinary homeowners, the expansion gap may look like an unfinished detail. But technically, it functions as a safety margin for the entire floor.
Later, skirting boards or baseboards will cover the gap visually.
The required expansion space depends on several factors:
flooring type
room size
climate conditions
installation pattern
direct sunlight exposure
underfloor heating system
For laminate flooring, installers generally leave a larger expansion gap compared with LVT flooring because laminate cores react more noticeably to humidity fluctuation.
Large open commercial spaces may require even more movement allowance or additional transition profiles.
Although laminate flooring and LVT flooring both use click systems today, their material behavior is still different.
Laminate flooring:
usually feels more rigid
has high surface durability
uses HDF core structure
reacts more to moisture variation
LVT flooring:
contains more flexible vinyl-based material
generally handles moisture better
often shows lower thickness swelling
still reacts to temperature change
This is why installation requirements may vary between the two products.
For example:
laminate flooring may require stricter acclimatization
LVT may require additional attention under direct sunlight
both still need expansion gaps
In actual flooring projects, installers do not treat all click flooring products exactly the same way.
Sometimes marketing discussions focus heavily on single keywords like:
waterproof
dimensionally stable
anti-swelling
rigid core
But real flooring performance depends on the complete system:
production quality
hot pressing consistency
core material quality
transportation conditions
acclimatization
subfloor preparation
installation workmanship
expansion allowance
Even a high-quality laminate flooring product can fail if installation ignores basic movement principles.
At the same time, proper acclimatization and correct expansion gaps can significantly improve long-term flooring stability.
Hot pressing, acclimatization and expansion gap belong to different stages of the flooring process, yet they are directly connected.
*Hot pressing creates the engineered flooring structure.
*Acclimatization helps the flooring gradually adapt from factory conditions to real installation environments.
*Expansion gaps provide the remaining tolerance space for future dimensional movement.
For laminate flooring and click LVT flooring, understanding these three concepts is important not only for manufacturers, but also for distributors, installers and end users.
Because in flooring practice, stability is rarely determined by one single factor alone.
