A very important aspect in this process is the floor support surface, which can be a cement screed or a wooden structure. In any case it must be dry, otherwise the wood curves and the spaces between the boards appear. If we mount on the screed, the recommended relative humidity is up to 2%, and in the case of the wood structure, the recommended relative humidity is maximum 12%. Moreover, the substrate must be smooth and flat: flatness must not exceed 2mm / 1.5m linear deviation, clean: scratched or sanded, matured, without wax, grease, paint, oil, other debris and dust.

With regard to the installation,

if the flooring is made of solid wood or laminated wood, it is appropriate to place it on an elastic layer and to join the wooden elements together with an adhesive inserted in the "nut" part of the "nut-feder" joint the adhesive comes out of the calculation if the joining system is click type). If the floor is of unfinished solid wood, we recommend that you adopt a fixed fitting by gluing with adhesive or on nailing glue. In this latter case, the assembly can be followed by various finishing work such as sanding, sanding, scraping (rarely) and dusting by suction and wiping. Upon your preference, the final operation is lacquering by applying 2-3 coats.

Underfloor heating

This second aspect is very important. Indeed, the main effect of heating on solid wood elements is to reduce their humidity, thereby reducing the size and creating more or less important joints between the blades. The double layered parquet, thanks to its multilayer wood support, offers a maximum dimension of stability and greatly reduces the presence and size of these joints.


To install double-layered parquet, a non-water-based adhesive (two- or two-component polyurethane or polyurethane epoxy-polyurethane) should be used and able to maintain the appropriate elasticity characteristics over time.

During installation, it is recommended that the expansion joints existing in the screed support be installed in the parquet. In their absence, it is recommended that at least the expansion joints of the parquet be achieved at the coincidence of the neighboring spaces (under the doors).


Typically, double layered parquet has exceptional dimensional stability, even in hostile conditions. Wood, by its nature, is subjected to dimensional variations that depend on humidity and ambient temperature. In order for this natural behavior not to cause undesirable effects on the floor, the ambient climate must always be maintained within the recommended limits:

The air temperature should be between 15 and 30 ° C and the relative air humidity (especially) should be maintained between 45% and 65%, this range of values ​​corresponding, inter alia, to health and normal hygiene conditions for humans. In order to guarantee the stability of the flooring and especially the human physiological requirements, the temperature at the surface of the parquet should never exceed 26 - 27 ° C (it should be noted that modern, low-temperature installations provide notable ambient comfort at a floor temperature about 24-25 ° C). In order to avoid heat build-ups and, consequently, the appearance of joints or corrugated flooring, in addition to low thermal efficiency, it is advisable not to cover wood floors with thick carpets or other materials with high thermal resistance.

It should be borne in mind that prefabricated double-layered parquet, subjected to a particular and intense heating period, may have slight contractions and small joints between the blades but disappear once the heating system is switched off. If these phenomena occur, the particular construction features allow for optimal surface maintenance, since this type of parquet, although having a monolithic appearance, is actually composed of several blades, each of which forms a separate module, with the possibility of removing some of they do not produce superficial ruptures and, when the heating period ceases, with the possibility of approaching without showing perennial signs. For installations that also have cooling function, all anti-vapor and anti-condensation systems must be provided in order to avoid condensation formation at any level of the floor composition. The lack of these systems can make the flooring absorb moisture and, consequently, suffer dimensional deformations.