Which vinyl floor underlay for footfall sound insulation?

Whether or not impact sound insulation is necessary for Click vinyl flooring depends on various factors, but in general this question can be answered with a clear “yes”.

Finally, the vinyl floor underlay should provide the necessary peace, warmth and stability.

But what about the insulation with vinyl on underfloor heating? How are the documents suitably laid? And are there any alternatives to the classic vinyl floor underlay?

Why use a vinyl floor for footfall sound insulation?

Vinyl floors can be laid floating or laid with the subfloor using adhesive.

In the case of a floating installation, an underlay for the vinyl floor is also absolutely essential.

Anyone who does without suitable insulation here risks so-called walking noise, an unpleasant “clacking” when walking.

The underlays also insulate the floor from the substrate. Just as they can even out (slight) unevenness in subfloors without having to carry out more complex levelling work beforehand.

Further functions at a glance

Not only are the neighbours underneath you grateful for an improvement in footfall sound, but the room acoustics in your own rooms can also be improved.

The quieter the floor is when walking on it, the more pleasant the acoustics of the room.

Find the right underlay for vinyl flooring

Impact sound insulation for vinyl flooring is therefore indispensable. Lay the vinyl floor without underlay? Not such a good idea.

The laying of an underlay for the vinyl floor is essential for a comfortable walking experience and the prevention of clicking noises.

The different types of vinyl floor underlays

Relatively common are insulations made of PU low expansion foam. They consist of mineral fillers and polyurethane.

The comparatively heavy rolls are best suited as a vinyl floor underlay for underfloor heating, as they have a relatively low thermal resistance.

Due to their heaviness there is also a significant improvement in the sound values.

The polystyrene sheets, a kind of polystyrene, are inexpensive to buy.

They are easy to install, but reduce sound only moderately well. Furthermore, they are rather not suitable for underfloor heating.

Latex insulating underlays also have poor heat conduction. Anyone who does not have underfloor heating but still wants heat-insulating properties could take a look at the material cork.

When can a vinyl floor also be installed without impact sound insulation?

If a vinyl floor is to be installed floating, it is imperative that an insulation mat is placed between prepared subfloor and the vinyl floor.

If, on the other hand, the floor is made of solid vinyl and is to be glued to the subfloor, no additional footfall sound insulation is required as an underlay. Because in this case, the impact sound insulation under the screed already ensures sufficient absorption of walking and impact sound.

Since the vinyl floor is bonded to the screed with adhesive, nothing can rattle and therefore no insulation is necessary.

Old carpets as a substitute for footfall sound?

A carpet already laid as a vinyl floor underlay is not a good idea and is not approved as suitable by any vinyl floor manufacturer.

Carpets are too soft – regardless of their thickness. This usually leads to excessive yielding of the floor when it is laid and walked on. As a result, the click connections wear out over time and the floor starts to “move”.

Almost worse: Those who lay vinyl flooring on carpet usually forfeit the warranty on the floor. This is an area where savings should not be made under any circumstances!

In addition, a carpet is always susceptible to bacteria and germs if it no longer comes into direct contact with the air in the room.

Therefore, unpleasant odours often occur when the old carpet is used as footfall sound insulation for the vinyl floor.

What footfall sound insulation for a vinyl floor on underfloor heating?

Owners of underfloor heating should pay attention to the special properties of the insulation mat used.

The most important factors are heat resistance and an appropriate thermal resistance.

Especially with older underfloor heating systems, the material must be able to bear the heat, as these usually become much warmer than modern systems.

Another important property is durability and resistance to moisture.

Tip for the purchase: The thermal resistance according to DIN 12667 in the unit m2 K/W is usually stated on the product. The lower this value, the better the heat transfer.

Does it need an additional vinyl floor foil?

Whether at all and especially which insulation underlay is required depends on the substrate. Anyone who wants to lay vinyl flooring on a floating screed needs a so-called vapour barrier.

This is available in the form of a PE film and protects the floor from rising damp from the subsoil or damp rooms below.

Ultimately, the moisture could lead to considerable damage to the material.

Laying vinyl flooring Impact sound insulation

A Klick vinyl floor underlay is relatively easy to install. Especially if the floor does not have any major unevenness.

If this is the case, however, unevenness must first be levelled with a cementitious levelling compound. Otherwise, preparation includes cleaning with a broom and a vacuum cleaner.

The impact sound insulation is then rolled out in strips. It is important to start at the longitudinal wall and always work parallel.

The individual webs must not overlap, as this can later lead to unevenness in the floor. In this context, one speaks of a “butt-to- butt transfer”.

To make it easier to lay the insulation mats, the sheets can be fixed to the floor at certain points. Now all further courses follow. At the longitudinal joints, the sheets can be easily joined with adhesive tape. Then continue with the laid vinyl flooring using the vinyl cutter.

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