Antico E' - Antique and new wooden floors
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Features of the screed before laying wooden floor

Features of the screed before laying wooden floor

Correct laying of the wooden floor requires a screed that satisfies precise characteristics. The screed, also called sub-base, is a fundamental element comparable to the quality of the wooden parquet that you choose to lay and how it allows our wooden floor to last for a long time.

The laying of a wooden floor, old or new, is performed only if the screed is leveled, compact and dry at the right point. In this way, our wooden parquet flooring can be laid evenly and without the risk of cracks or "steps" between one axis and the other of our floor.

Check the screed before laying wooden parquet

To be sure to start laying wood parquet, we must perform a series of tests on the cast floor; if all these checks are successful then we can start with the laying of our wooden floor.

These checks are mandatory and must be carried out and certified in order to guarantee to our customers that the laying parquet flooring has been performed with the optimal conditions. In another case, as already mentioned, our wooden floor could suffer deformations or problems of excessive absorption of moisture of the screed itself.

The screed for laying wooden floors


During the laying of the wooden floor, the adhesion of the boards to the screed must be total. The verification of the planarity of the substrate certifies that there are no depressions or bumps in the screed, such as to compromise the quality of the laying of the wooden floor. This check is done with a 2 m long straight edge (rule used by masons to spread plaster and level the mortar) and the tolerance allowed is 2 mm.


An optimal laying of wood planks requires a compact screed, which does not crumble and does not deteriorate over time. The verification of the compactness of the substrate is to this purpose to avoid that after laying wood planks can be deformed by resting on a weak screed. The control is done by vigorously beating a 750 gram wad on the surface. How to certify? There will not be any obvious fingerprints. The screed must have a full sound, metal while a deep, dull sound is of low index compactness.

The specifications for the laying screed for wooden floors


The screed on which the wooden parquet will rest must not deform, yield or break for any reason, will be the support of our wooden parquet and therefore we must have the guarantee of being able to provide the best support for laying the floor and its proper maintenance.
This is the purpose of checking the rigidity and compactness of our substrate, one to certify the resistance to large loads and the other to ensure the immodability as a result of blows or other localized trauma.


A wooden floor is made perfect not only by the quality of the wood that composes it, it also influences the way of laying wooden floor and the quality of its background that must have specific characteristics (those that we are just exposing in this article). The screed may have cracks or fissures and this is absolutely normal, if it is stable capillary fissures. How do we verify that the substrate is suitable? Jump on it! If these cracks "blow" dust then we can not lay the wooden floor.

The screed for laying wooden floors


The most important test to start laying wood parquet is relative to humidity, because wood, being a hygroscopic material, is able to absorb moisture and thus change over time. Normally we use two tools to perform this type of control:
- with the carbide hygrometer
- with the electric hygrometer
The first more invasive requires the removal of a small portion of screed, which is then reacted inside a tube containing precisely the carbide.
The second, instead, is much less invasive, perfect with a sensor that determines the characteristics and electrical conduction of the substrate.
If both tests give a positive result, we can lay wooden parquet.


Once the drying phase of the screed has been completed, the level of the substrate must also be checked to ensure that the laying of the wooden floor is carried out at the level established by the Construction supervision.
The finished wood floor must have a precise final level. The control is carried out by superimposing a sample of the wood to the screed made at thresholds, armored doors, French windows. etc.


Last check before authorizing the laying of wood flooring is that of cleaning. The screed must not be dusty, must not have oils, waxes, greases, various substances, stains of color or paints, gypsum or other incoherent substances. The risk is that of an imperfect adhesion of the wooden floor.

So when can we lay our wooden floor?

The laying of wooden parquet is a very delicate phase in the life of the future floor, if the installation is not carried out under optimal conditions we risk having a wood floor tomorrow that deforms, moves or crackles.

Our advice is to carefully check the condition of the screed on which you are going to lay your floor and not be in a hurry to lay down ahead of time, because the cost in terms of quality and durability could be quite high.

Ideal conditions? 20 ° C environmental temperature and humidity between 45% and 60%..

Good laying!

Ideal conditions for laying an antique wood parquet