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- Reduce transit sound by a minimum of 15 dB
- Correct unevenness in the subfloor to have a level base to install the floor
- Long-life performance of at least 20 years
- Excellent noise reduction on hard and soft floors by reducing walking and impact sounds
- Without chlorine, plasticizers, and solvents
- Durable, even heavy furniture leaves no lasting impression on the material
- Resetting behaviour (or resilience) of almost 100%
- Highly resistant to moisture and chemicals
- The underlays are supplied in convenient and easy-to-transport rolls
The polyethylene (PE) underlay is a foam for laminate and parquet floors that offers good impact and reflected walking sound reduction.
Made of high-density ethylene-vinyl acetate foam.
Sound is caused by the vibrations of elastic compounds. Vibrations as a result of impact or a surface being walked on transmit as sound waves. Impact noise is the sound transmitted to adjacent rooms and floors when the floor is used. Impact noise occurs on hard and elastic floors.
Placing underlay underneath laminate flooring enhances living comfort, as it noticeably reduces reflected walking noise within the home. The HD 1mm is the best-suited underlay to reduce transmission sound to a minimum. It’s ideal for an upper floor or an apartment.
A good underlay insulates against sound, stops rising moisture, and eliminates small irregularities. That is why it’s an essential part of the floor. It’s easy to install with a knife.
Roll out the underlay across the length of your room. Ensure that the end of the underlay is a bit higher at the edges to make the installation easier later on and protects against rising moisture. Install the underlay at right angles to the laminate flooring plank to prevent lengthwise joints in the underlay and laminate from coinciding.
Unlike laminate planks, there is no need to leave a gap between the underlay and walls. If the underlay has an integrated vapour barrier, it should extend up onto the wall by about 3cm. Unroll sheets of underlay side-by-side so they touch one another and join adjacent ones with sticky tape.
Use the knife to cut off any surplus. Don’t panic if you accidentally cut into the wall because this can be covered with skirting boards later. Follow the line of the wall and press well.
Remember that the underlay needs to be as smooth as possible. Never put two layers on top of each other as this will create unevenness. Immediately secure the first sheets of underlay with a laminate board and work towards the wall.
Carpeting is not a good substitute for underlay. Remove the carpet before installing the laminate.
On mineral substrates, it’s essential to spread a vapour barrier before installing underlayment to insulate against impact sound and reflected walking noise. If the substrate has residual moisture, a thin PE film is laid under the lining as a vapour barrier to protect hard surfaces. If the residual moisture is high, the subfloor must first be dried.
Mineral subfloors such as screeds may contain low residual moisture. A vapour barrier is recommended to protect the floor covering from damage. A vapour barrier is not suitable for non-mineral subfloors like wooden or chipboard subfloors.
|Underlays||PE Foam||PE Foam||HD|
|Packaging unit||1 Roll = 300 m²||1 Roll = 150 m²||1 Roll = 50 m²|
|Length (1 roll)||300m||150m||50m|
|Density (± 5 kg/m³)||30||35||95|
|Weight (1 roll)||10 kg||10 kg||5 kg|
|Recommended laminate thickness||Up to 12.6mm||Up to 12.6mm||Up to 12.6mm|
|Corrects unevenness and protects lock system||✅||✅||✅|
|Attenuation of transmitted impact sound||⭐||⭐⭐⭐⭐||⭐⭐⭐|
|Reduces walking sound||⭐⭐||⭐||⭐⭐⭐|
|Resistance to compression||⭐||⭐⭐||⭐⭐⭐⭐|
Vapour barriers are materials used for damp proofing. The best approach is to lay a sheet (also called a membrane) of PE film 0.2mm thick beneath laminate flooring. Sheets are available in different sizes. A single sheet measuring four by four metres is large enough to cover most rooms. Sheets two metres wide and up to five metres long are also available rolled up. They are placed parallel to one another.
Laminate flooring consists mostly of wood, and wood reacts to moisture by swelling or warping. A vapour barrier protects the flooring by preventing moisture below from penetrating and damaging it.
It’s important to lay down a vapour barrier on mineral substrates such as concrete and screed, as they emit moisture. But installing a membrane is often advisable on subfloors that look dry at first glance. On ground floors, for example, the moisture content of the substrate can fluctuate from rainy season to hot season.
In heated rooms over basements, a vapour barrier is indispensable. Condensation readily forms in the ceiling over an unheated cellar and rises towards the laminate from there.
Before you start laying a membrane, it may be necessary to obtain a residual moisture report from a screed specialist. Always install vapour barriers on a clean and dry surface.
Start in one corner of the room and spread the vapour out across the floor.
As moisture can also penetrate laminate flooring from walls, make sure to place the vapour barrier so it extends up on each wall by three centimetres. In corners, you can cut a slit in the edge of the sheet and lay or fold the flaps over one another. The membrane will be covered later by the skirting boards.
Use sticky tape to fix the membrane to the walls so it won’t slip out of alignment.