Fiberboard Underlay: this fiberboard underlay is for floating wood and laminate flooring and can be used over all types of sub-floors. It helps to compensates for unevenness in the sub-floor and smooths surface irregularities, whilst reducing sound transmission by 18db. It also helps for thermal insulation.
- Coverage: 9.6m²;
- Length: 860mm;
- Width: 590mm;
- Thickness: 5.5 mm, 6mm.
INSTALLATION OF UNDERLAY
It is advisable to keep the underlay in the same room it is 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.
Fiberboard 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 the underlay is installed. Leave 1–2 mm gaps between the underlay (Figure 2).
You can fix the underlay with couple of glue dots (figure 3) or staples/nails in order to secure it. 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).
A video presentation with installing Fiberboard underlay: