Usage of underlay

Underlay is used under floor covering materials (parquet, laminate) on hard and dry base surfaces.
Underlay levels the minor unevennesses of the subfloor, mutes the sounds of footsteps and makes the floor warmer.

Advantages

  • Sound insulation -22dB
  • Thermal insulation
  • Footstep damping
  • 100% natural wood fibre
  • Quick and easy installation
  • Smooths the unevenness of the floor
  • Compressive strength up to 20 tons/m2

Technical data of underlay

Thickness

mm

5

6

7

Width

mm

590

590

590

Length

mm

850

850

850

Boards in packet

pcs

18

14

14

Area of package

m2

9,03

9,03

7,02

Weight of package

kg

10,84

13,00

11,80

Package on pallet

pcs

24

20

22

Boards on pallet

pcs

432

360

308

Pallets area

m2

216,72

180,60

154,44

Density

kg/m3

ca 250

ca 250

ca 250

Thermal conductivity λD

W/mK

 ≤0,049

 ≤0,049

 ≤0,049

Bending strength

N/mm2

≥2,0 

≥2,0 

≥2,0 

Impact noise reduction index, Ln,w

dB

-54

-54

-54

Impact noise insulation, /Δi

dB

-22

-22

-22

Installation of underlay

It is advisable to keep the underlay in the same room they are to be installed in for 24 hours before installation in order to balance the moisture inside the boards with humidity of the surrounding air. The boards are placed sideways and bars are put under and between them, so that the boards are exposed to air.

Underlay is placed next to each other on base surface, leaving 5–10 mm expansion gaps between the boards and the walls. In order to get an adequate expansion gap, you can place pieces of underlay between the walls and the boards and remove them later when all the underlay is installed. Leave 1–2 mm gaps between the underlay (see Figure 2).

You can fix the boards with couple of glue dots (Figure 3) or staples/nails in order to secure them. Underlay is installed in a way that the angle between the joints of flooring and the joints of boards would be 45˚, this helps to avoid the joints of the boards and flooring to overlap (Figure 2 and 3). Floorings are installed directly on underlay (Figure 3).