Use and Care Guide

The European Multilayer Modular Floor Association (MMFA) recommends that you always use
underlayment for all types of modular floor finishes, including LVT boards.
The density of the recently developed underlayment for LVT (650 kg/m³) is 2.5 to 3 times higher
than that of a standard coniferous material underlayment. This is exactly what you need to
protect your vinyl flooring lock-joints!
The surface structure of such underlayment, for LVT, allows using both adhesive and lock-joint
flooring laying methods. The more elastic side of the board allows leveling the uneven subfloor
with minimal effort and expense.
10. Are underlayment boards prone to decay?
No, wood fiberboards do not decay. They eliminate the conditions for mold growth, and rotten
musty odors. Unlike inorganic insulators, they absorb moisture and give it off as the air
temperature and humidity changes, without losing their own thermal insulating properties.
The fiberboard humidity is always in equilibrium with the relative humidity in the room. Soft
wood fiberboards have many adjacent open pores allowing a significant amount of moisture to
pass through. The vapors mainly condensate on the cooler adjacent layer to the board. Thus,
the soft wood fiberboard structures almost always remain dry. This property of wood
fiberboards prevents the decaying of structural materials.
11. Can underlayment be used as thermal-insulation and/or soundproof material on
interior walls of a premises?
Yes. Many of our customers used the underlayment for thermal insulation and soundproofing
(see video). Even thin underlayment has all the properties inherent in wood fiberboards
including thermal insulation and soundproofing.
Both thick soft wood fiberboards and thinner underlayment have rather high thermal inertia.
This term refers to the process when the heat flux temperature decreases as the flux passes
from the outer surface of the material to its inner surface. The longer this time is, the longer
the room air heats up or cools down. The soft wood fiberboard thermal inertia index is 11-12
hours, while that of mineral wool boards is about 6 hours.
Good thermal-insulating properties of soft wood fiberboards are also due to their very high
specific heat capacity (2,100 J/k*K° versus 880 J/kg*K° for mineral wool boards and 1,700
J/kg*K° for foamed plastics). This allows the boards to accumulate heat well.
Due to many pores in the boards and in the wood structure itself, soft wood fiberboards are
classified as highly efficient soundproof materials. The combination of hard gypsum boards and
fiberboards will significantly reduce the acoustic discomfort in the room.
12. What is the best way to cut the underlayment?
You can cut the underlayment with either a sharp or a blunt item. The latter is even more
convenient since it results in less wood dust. Just push through with a blunt item or draw a
deep groove along the ruler where you want to cut, and then gently break the board along it.
You can use a pencil, ruler, ballpoint pen, etc. To bypass pipelines, protrusions, niches, etc.