Overview of 8 popular defects in parquet lacquering and methods for their elimination

Parquet lacquering requires accuracy and care. Still: the slightest mistake and on a freshly applied smooth surface various defects are formed. Most often they appear as a result of improper application of varnish, non-compliance with temperature or humidity conditions specified in the instructions. Thus, if you notice flaws on the varnish surface of the parquet, pause the work and eliminate the causes that led to the defect. And in order for you not to have to carry out a long analytical work, we will describe in detail the most common defects, their causes and solutions.

Defects on the varnish surface of the parquet most often indicate non-compliance with the rules for the performance of paintwork

Defect # 1 - Film Roughness

Causes:

dust on film or on the surface of the floor before varnishing
insufficient intermediate polishing of the previous varnish coat
too thick varnish

As a rule, the roughness is easily eliminated by grinding the problem area and reapplying the varnish to the entire surface. In this case, it is unacceptable that the work was carried out in a dusty room using a dirty tool.

Defect # 2 - sagging on the varnish surface

Causes:

low temperature varnish
high humidity combined with a cold floor surface
the general humidity of the room tends to 80-90% (often happens in new buildings with dry walls)

Sagging occurs in a fresh layer of varnish when moisture accumulates in it from the air. In order to eliminate this defect, it is necessary to wipe the place of influx with a solvent, and then re-coat the parquet with varnish. However, so that there is no recurrence of the incident, it is necessary to warm the surface of the floor and the room as a whole before applying varnish to reduce the overall humidity.

To protect and protect it from the harmful effects of dirt and dust, it is necessary to create a protective coating. Parquet varnish will help protect the coating from pollution and preserve the wood texture. We will tell you how to choose the right varnish for parquet in the article:https://floor.expertexpro.com/en/pol-pokritiya/parket/kak-parket-lakom-pokryt.html.

Defect # 3 - Inadequate Gloss

Causes:

low surface temperature
high humidity wood
non-observance of drying periods between successive varnishes

If the surface of the parquet after applying a glossy varnish was matte, then the best way to add shine to it is to re-varnish it. Subsequent application should be carried out only after drying of the previous layer (after 1.5-2 hours). A prerequisite is also warming up the parquet to increase its temperature and reduce the moisture content of the wood.

Re-applying varnish on the parquet will make the matte surface shine.

Defect # 4 - cracking of the varnish film

Causes:

inelastic varnish
high humidity parquet
too thick varnish
a large amount of hardener in a two-component varnish

Cracked lacquered surfaces must be completely sanded and parquet varnished again.

Parquet board is an amazing material that gives the interior an indescribable naturalness and attractiveness. If you properly care for the parquet, then it will delight you for a long time. About how to properly care for a parquet board, read the material:https://floor.expertexpro.com/en/pol-pokritiya/parket/pravila-uxoda-za-parketnoj-doskoj.html.

Defect # 5 - slow drying of varnish

Causes:

the room temperature is too low (below + 10 ° C)
low floor surface temperature
the absence or small amount of hardener in a two-component varnish (the same effect is observed with poor mixing of the components)
the hardener is not selected correctly (for example, a polyurethane hardener is added to the acid hardener instead of the acid hardener - the curing reaction will not be observed in this case)
lack of ventilation and lack of fresh air
natural wood oils do not allow varnish to dry (for example, alkyd and other varnishes containing artificial oil resins do not harden on wood olives, reeds, teak and some other exotic species)
traces of old wax mastics (in case of restoration of a wooden floor), which interfere with the hardening of the varnish. This happens when using alkyd, urethane-alkyd, acidic and polyurethane anhydrous varnishes.

Most often, in order for the varnish to begin to dry faster, it is enough to increase the room temperature to + 20 ° C, warm the floor surface and increase ventilation. If the wrong hardener was chosen, then the non-hardening layer will have to be completely removed, and after that the varnish (mixed with the necessary hardener) should be applied to the parquet again.

Sometimes, in the case of using acid varnish, the situation can be corrected differently. To do this, an acid hardener is applied to the non-hardening surface with a brush. After that, if the hardening process resumes, the varnish layer will need to be polished and a new layer applied to it - the front one.

Defect # 6 - swelling of the varnish film

Causes:

incompatibility of several varnish layers applied to each other (for example, water-dispersion varnish is applied to a layer of polyurethane varnish).
mixing varnish with a cleaning agent that has been applied to the tool for work
wrong diluent choice
insufficient grinding of the previous varnish layer

If swelling is observed on a small area of the wood surface, then it is possible to carefully peel off the exfoliated varnish and apply a new layer, according to all the rules. If swelling is observed on most of the floor, then grinding will have to be carried out over the entire surface.

If the parquet has faded or the surface has been damaged, it is possible to restore such a coating that it will be cheaper than a complete replacement. You will learn about the best ways to restore parquet with your own hands on our website:https://floor.expertexpro.com/en/pol-pokritiya/parket/vosstanovlenie-parketa-svoimi-rukami.html.

Defect # 7 - bubbles under the varnish

Causes:

thick coat of varnish
wrong choice of varnish tool (roller or brush)
low temperature varnish
sun exposure of the freshly applied layer

Bubbles in the varnish layer form if the varnish hardens on the surface and remains viscous inside. The evaporating solvent cannot penetrate the hard shell, therefore it remains inside the lacquer layer in the form of multiple bubbles. This defect can be corrected in one way: polish the problem surface and re-apply the varnish.

Sometimes the reason for the appearance of bubbles on the varnish layer is the wrong choice of brush

Defect # 8 - “Craters” on the varnish surface

Causes:

draft
Incorrect tool selection (especially for rollers)
wrong diluent choice
low temperature varnish

The varnish coat with "craters" must be completely sanded and a new face coat applied.

Thus, most defects on the lacquer surface are fairly easy to eliminate. However, in some cases, even numerous alterations and compliance with all the rules for paintwork do not change the situation for the better. Most often this is due to the quality of the varnish.If there is a suspicion that the reason is this, the work should be stopped and seek advice from the seller of questionable products.

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Eugene
2 years ago

They laid the parquet during repair, for half a year of operation - the top layer began to peel off, the regular use of special tools does not help, varnishing is also quite expensive, not to mention other vagaries. I am very sorry, it would be better to take a laminate of class 33, as it was before.
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Natalya
6 years ago

There are really quite a few problems with parquet. I imagined how much torment would be with him, but still decided that it was his bed in the new apartment, as he fit perfectly into the interior of the entire apartment as a whole. And everyone has long known that parquet looks much more expensive and elegant than the same linoleum. Defects, however, began to appear almost immediately after the repair work was completed. This upset me, I had to immediately buy a special tool that visually removed these same defects, or rather the gaps between the boards. But in general, I do not urge anyone to abandon parquet, it serves for a long time, despite the moodiness.
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Alyona
6 years ago

When they renovated a new apartment with her husband, they decided to choose parquet. Most suited to the interior of the apartment, and it's just a great option for decorating rooms. But, to be honest, after 5 years after a full move to this apartment, I began to regret my choice.
Why? It's just that parquet is not linoleum, it needs suitable and constant care, otherwise defects really appear. Especially not an option if there are small children in the house, for example, two hooligan boys. A large amount of any liquid will be poured, everything, you have to re-varnish the parquet in this place. Of course, there will be practically no harm to him from ordinary water, but it will be very difficult to get rid of stickiness from juice, soda.
Nevertheless, parquet has a huge number of advantages. It looks expensive and stylish, even the most modest atmosphere in the apartment will decorate and make more luxurious. It’s also a paradox, but it can last a very long time, provided that it is constantly cared for.
Not all professionals in their field will be able to make an ideal smooth surface near the floor. Masters need to be selected for a long time and it is desirable that he already covered the floor, for example, with your friends or relatives. To see his creation with my own eyes before ordering.
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Vladimir
7 years ago

I'm generally a big fan of parquet. It has a large number of advantages, let’s put it over linoleum or tile. But, when they laid the parquet in the house for me, at first it seemed to me that everything was done perfectly, but with a top I saw that when it was coated with varnish, bubbles appeared. It’s as if I myself didn’t fix anything, but the workers corrected everything.
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