Shrinkage of a house from a bar: reasons and methods of acceleration

The construction of various buildings and structures made of wood is quite popular today. But many people forget that shrinkage is inherent in all wooden buildings. This should be taken into account before starting the construction of a wooden house or a bath. Due to shrinkage, the characteristics of the building are distorted, which can be the cause of a number of negative phenomena: skewing of the openings of windows and doors, their jamming, the formation of holes in the frame. We will try to understand the reasons for shrinkage, tell you how long you need to wait for its completion and how to reduce its negative impact.

Shrinkage reasons

First you need to understand why houses made of kiln-dried profiled timber or any other type of wood generally sag. You also need to come to terms with the fact that this inevitable process, as it proceeds, slows down, but does not stop completely..

The main factor here is the special properties of the wood.. The tree is distinguished by a structure of a porous nature, which allows it to absorb and release moisture efficiently, which causes a change in its size. And the timber sawn from wood has the same properties as wood. It reacts to the humidity of its surroundings by absorbing and releasing moisture. To minimize this, a house from a bar of natural moisture needs shrinkage. During this period, a house made of this building material has time to settle down and dry out..

If we talk about the degree of shrinkage and the speed of this process, then everything will depend on the category of material.. The greatest deformation is usually typical for buildings made of simple wooden beams..

Although when using glued laminated timber or dry material, shrinkage can still not be avoided, despite the assurances of wood suppliers that this is possible.

How long does it take?

Considering that the phenomenon under consideration when creating a house from a wooden beam with a size of 150×150 mm or any other cannot be avoided, we will try to at least figure out how long this process takes.

The material from which the building is made will be important. If it is made of lumber of natural moisture, then the process in question usually lasts 6-12 months. After that, you can already start laying communications, preparing for the installation of openings of windows and doors, as well as interior decoration.

Besides, the time of year when the construction was carried out should also be taken into account. For example, a house that was built in the summer must dry for 1 year, and an 8-month period is enough for a winter house. Given this, most often the construction of such buildings is carried out precisely in winter..

During this period, moisture from the material freezes out very slowly, which is why the process of its deformation is more uniform than in warm months.. In the log house, created in November, the process of settling the crowns is completed by June. Then it will be possible to install doors, windows, carry out finishing work and not be afraid of cracks in the walls. By the way, the advantage of building a house in winter will be the cost of assembly – about 20% lower than in summer.

The most intensive process of wall shrinkage in this type of houses occurs during the first 90 days from the date of completion of construction. And its full completion usually occurs within 3 years..

How to accelerate shrinkage?

Experts agree that the shrinkage of a house from a bar of natural moisture is carried out in about 12 months, and sometimes in a slightly longer period. After this period of time, experienced developers begin finishing work. They are engaged in the laying of communications, installation of windows, wall cladding, and also perform other types of work.

According to professionals, if well-dried wood was used during construction, then much less time for shrinkage will be required..

At the same time, dried wood has a higher price than an analogue of natural moisture, which affects the final cost of the building itself. The customer is not always ready to overpay for the dried tree and prefers a solution that is slow in implementation, but cheaper..

Another way to reduce the shrinkage time of a log house is to create a building from laminated veneer lumber. When creating such a building material, not only its profiling and gluing is carried out, but also the highest quality drying. As a result, you can get a material that almost does not give any shrinkage of the building..

If we talk about cost, then glued laminated timber will be expected to be more expensive than a solid one. But a small difference in price is justified, because it allows you to significantly save time.

In general, shrinkage is influenced by a large number of factors, due to which it is possible to somewhat reduce its time. Here they are:

  • type of timber;
  • its cross section;
  • humidity;
  • dimensions of the building;
  • felling assembly technique;
  • the type of tree from which the timber was created;
  • time of year when the building was assembled.

Expert advice

If you still want to save money and give preference to a more accessible type of timber, then you should not forget that the material of natural moisture will necessarily dry out during its use. And this gives shrinkage and is very large, which will cause deformation of the building..

Experts say that you may not even notice that the shrinkage process is in full swing. But the owner of the house will definitely see its result – even the smallest shift will cause cracks to appear on the ceiling and on the roof..

It will not be superfluous to listen to some of the recommendations of experts. They will help to avoid a number of negative phenomena that may appear with the wrong selection of material for the construction..

  • The installation of frames for windows and doors should not be carried out directly on the logs, but on a special casing. This solution will significantly reduce the risk of their deformation during the shrinkage of the building..
  • It is required to create such expansion gaps, which will then need to be filled with polyurethane foam. When shrinking, this material tends to change its own volume..
  • To avoid the appearance of cracks due to the shrinkage of the building, you should mount special shrinkable expansion joints – jacks. The use of such devices allows you to level the height difference that appears when the building shrinks. Note that jacks are very often used in many wooden buildings..
  • You should not save on materials for a house made of timber. Indeed, in this particular case, the adage that the miser pays twice will be very relevant..
  • The main advice given by professionals is that you should choose the right building materials. For this, it would be best to consult with specialists. Experienced craftsmen will tell you exactly which material is better to purchase in each specific case, and will take into account the features and details of the construction.

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