When comparing SPC flooring, overall thickness is often one of the first specifications people look at.
A 6mm floor may be compared with another 6mm floor, and it is easy to assume that the two products are broadly equivalent — especially if the plank size and appearance are similar.
But thickness is only one part of the product.
Two SPC floors with the same nominal thickness can still differ in construction, wear layer, attached underlay, locking performance, surface details and manufacturing consistency.
That does not automatically make one product better than the other.
It does mean that thickness alone is not enough to make a meaningful comparison.
1. First, Understand What the Thickness Represents
“6mm SPC” sounds like a clear specification.
But what does the 6mm include?
For example, a product may be constructed as:
5.0mm SPC + 1.0mm IXPE
while another product described with a similar overall thickness may use a different construction.
The SPC core and attached underlay serve different purposes, so comparing only the final thickness can hide an important difference.
This is one reason why two apparently similar quotations may not represent exactly the same product.
2. Wear Layer Should Be Considered Separately
Overall thickness and wear layer thickness are not the same thing.
Two SPC floors may have the same overall thickness while using different wear layers.
For example, a 0.30mm wear layer and a 0.50mm wear layer represent different product specifications even when the total flooring thickness is identical.
But this does not mean that the thicker wear layer should automatically be selected.
The more useful question is:
What level of performance is appropriate for the intended application and market?
Residential use, higher-traffic applications and different market positions may call for different specifications.
Choosing the right specification is more important than simply choosing the largest number.
3. Thickness Does Not Tell You Everything About the Locking System
We often see flooring problems discussed in terms of gaps, movement or damaged joints.
These problems cannot always be explained by one factor — subfloor conditions and installation can also play an important role.
But from a product comparison perspective, there is another point worth remembering:
Overall thickness tells you very little about the locking system itself.
The locking profiles are a relatively small part of the plank, but they are important to how a click floor fits together.
When evaluating SPC samples, it can therefore be useful to connect several planks rather than looking only at the colour and surface of one piece.
How consistently the planks fit together is also part of evaluating the product.
4. A Specification Sheet Does Not Tell the Whole Story
Numbers are useful.
But SPC flooring is a manufactured product, and two products with similar numbers on paper may not necessarily be identical in practice.
Production consistency, machining, surface finishing and other manufacturing factors can influence the finished flooring.
This is also why simple assumptions such as:
“Heavier is always better.”
or
“Bigger numbers always mean a better floor.”
can be misleading.
For buyers, the goal should not be to maximise every number.
It should be to understand whether the product is consistent and appropriate for the intended market.
5. Attached Underlay Is Part of the Product
Attached IXPE or EVA backing is common on SPC flooring.
It should not be treated simply as an extra feature.
Its material and thickness form part of the complete flooring construction, and buyers should also understand whether the quoted overall thickness includes the attached backing.
For example:
6mm SPC core
and
5mm SPC + 1mm attached underlay
should not automatically be treated as the same construction simply because both involve the number “6mm.”
Again, the point is not that one must be better.
They are simply not the same specification.
6. One Small Sample Can Hide Important Differences
This is particularly relevant when choosing wood-look flooring.
One sample plank may look excellent.
But across a larger floor, other characteristics become much easier to see:
- colour variation;
- pattern repetition;
- bevel appearance;
- surface texture;
- how consistently several planks fit together.
This is why a single small sample is useful for initial selection, but it may not tell the complete story.
When the order is significant, comparing several representative pieces can give a more realistic impression of the finished floor.
7. So Why Can Two Similar SPC Floors Have Different Prices?
There is rarely one universal answer.
Different specifications, product positioning, production requirements, packaging, testing requirements and commercial conditions can all influence a quotation.
But a higher price does not automatically prove higher quality.
And a lower price does not automatically mean poor quality.
This is where comparison becomes important.
Before asking:
“Why is this supplier more expensive?”
it may be more useful to ask:
“Are these two quotations actually based on comparable products?”
Sometimes they are.
Sometimes they are not.
What Should Buyers Focus On?
There is no need to turn every flooring purchase into a long technical exercise.
For most comparisons, start with the fundamentals:
Construction — What does the quoted thickness actually include?
Application — Where will the flooring be used?
Performance requirement — Is the specification appropriate for that application?
Consistency — Does the sample represent what is expected from production?
Comparison — Are the products genuinely similar enough for price to be compared directly?
Once these questions are clear, the price per square metre becomes much more meaningful.
For larger orders or market-specific requirements, additional product details, testing and commercial requirements may also need to be reviewed before a final decision is made.
Final Thought
Two SPC floors can both be called “6mm SPC” and still be different products.
That does not mean buyers should always choose the more expensive option.
It also does not mean they should always choose the highest specification.
A better approach is to start with the intended market and application, understand what is actually being compared, and then evaluate the price.
The right SPC specification is not necessarily the highest one. It is the one that fits the market, application and expectations of the buyer.
For importers and distributors, defining those requirements clearly before comparing quotations can make sourcing decisions much more meaningful.