Unifloor Underlay Systems in Deventer has been the market leader in the Netherlands for over 40 years

Explication of the pictograms

To be able to project a clear view of all our products, we use worldwide standardized icons. The user now is able to simply recognize the special properties of all the individual subfloor systems. A clear explanation of the icons we use on our site, is to be found on this page.



Thermal Resistance


Impact noise


Airborne noise




Fire Class

There are 7 fire Classes: A1, A2, B, C, D, E en F. When referred to flooring, the class is recognisable when it is followed by the indication “fl” (floor) in subscript: for exampel: Bfl . A1 is the highest class which indicates these products will not contribute in any form to a fire. Products with hardly any contribution to fire will be classed A2. When a material is not tested or does not meet the requirements of E Class, automatically it will be classed as Ffl.


Euro Class


Smoke Class


Contribution to fire






A1 fl

  Not appl.  



Non Flammable


Natural Stone, Ceramics


A2 fl

  s1 or s2  



Practically Not Flammable


Natural Stone, Ceramics


B fl

  s1 or s2  

Very minimal


Hardly Flammable


PVC, Cement
Bonded Panel


C fl

  s1 orf s2  





Heavy Solid
Wood Types


D fl

  s1 or s2  



Well Flammable




E fl




Very High


Very  Flammable


Some Artificial Floors


F fl




Not Determined


Most Flammable




Smoke Class

Besides the fire class, materials are also classed on the degree of smoke development. We recognise three classes:
s1: Minimal Smoke Development
s2: Average Smoke Development
s3: Large Smoke Development