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Insulating a wooden house: 7 common mistakes

Let’s analyze the main mistakes that prevent you from correctly insulating a wooden house.

Log and log houses, built several decades ago, have already aged and begin to let in the cold during the winter months.

Insulation of a wooden house

Mistake # 1. Thermal insulation of a log house without wood inspection

Mistake # 2. Lack of attention to caulking

Mistake number 3. Insulation of a log house on the wrong side

Mistake # 4. Rough choice of thermal insulation material

Mistake # 5. Careless handling and storage of material

Mistake # 6. Choosing flexible mats instead of rigid boards

Mistake # 7. Incorrect determination of the thickness of the thermal insulation layer

Therefore, it is very important to exclude possible oversights that regularly arise when unqualified thermal insulation of wooden log cabins with modern materials. Let’s take a look at the most common ones.

Mistake # 1. Thermal insulation of a log house without wood inspection

As a rule, already “old” log cabins are insulated. On the one hand, it is technologically convenient: the log house has finally settled down and the dimensions of the structure remain unchanged. However, the past years could not but leave traces on biologically living material – wood.

Insulating a wooden house: 7 common mistakes

Therefore, before the planned insulation, which implies that there will be no access to the logs for many years, it is necessary to carefully examine all crowns and discard defective fragments. If a bug eating wood is wound up in the logs, I will make a cautious assumption that it is no longer advisable to insulate the house. A cardinal medicine for such a case, except for a weekly forty-degree frost, has not yet been invented.

Good wood should be impregnated with a fire-fighting and antiseptic composition and thoroughly dried. It is a mistake to carry out insulation on raw wood.

Mistake # 2. Lack of attention to caulking

Traditional caulking is performed, strictly speaking, not to insulate the log house, but to exclude blowing it, which ultimately affects the preservation of heat in the house.

Insulating a wooden house: 7 common mistakes

When deciding to insulate log facades, pay attention to the condition of caulking on all crowns. Do not dismiss this operation. Perhaps it is thanks to 2-3 defects of this natural insulator that it is cold in your house in winter.

Insulating a wooden house: 7 common mistakes

Mistake number 3. Insulation of a log house on the wrong side

From which side to insulate the log house? This is truly a conceptual issue that needs to be solved for yourself once and for all. In addition, it will be useful to share the acquired knowledge with friends and neighbors.

Insulating a wooden house: 7 common mistakes

Without plunging into the basics of building heat engineering and without delving into the meaning of the obscure phrase “dew point” (which is the basis for choosing the location of the insulation), take on faith the craft postulate: the insulation of structures is performed from the outside.

Such an installation improves the operation of both the wall bearing material (tree crowns) and the insulation itself. Otherwise, both the insulation and the wood of the logs will get wet from the humid vapors inevitably found in the atmosphere of human housing. Of course, we do not strive for this at all. You can read more about the features of the insulation of the outer walls of a wooden house in the section of the same name of the article Warming a country house inside and out.

Mistake # 4. Rough choice of thermal insulation material

Construction markets are literally and figuratively overwhelmed with a variety of thermal insulators.

Insulating a wooden house: 7 common mistakes

However, if we introduce a strict systematization into this abundance, it turns out that only 3 types of materials, suitable for wooden log cabins, dominate. These are heaters:

  • mineral wool,
  • glass wool,
  • expanded polystyrene – cellular and extruded.

Let’s talk about the latter first. This is an excellent heat insulator, which has better thermal insulation qualities than the first and second. It practically does not absorb moisture and does not allow water vapor to pass through. It would seem that there is nothing more to dream about. However, the biggest “but” is that when in contact with an open fire, that is, in a fire, expanded polystyrene does not just burn, but only melts, but with the release of truly dangerous gaseous chemical compounds. For those readers who take these words frivolously, I recommend recalling the tragedy in the Permian “Lame Horse”, which claimed a hundred and fifty lives due to the fact that the combustion products of the insulation got into the lungs of the visitors of this “pub”.

I do not mind using this material, but I vote with both hands for its thoughtful use. There, for example, where the fire will never reach – in the foundation, in the basement, in the blind area. Here he truly has no value.

Choosing between glass wool and mineral wool is more difficult. Both are perfect for insulating a log house. You will learn about which thermal insulation materials are preferable from a safety point of view from the article Thermal insulation for economical in questions and answers.

Mistake # 5. Careless handling and storage of material

Thermal insulation materials must be dry. Only in this case they “keep” warm. And if the material gets wet, then its heat-insulating capacity drops dramatically.

Insulating a wooden house: 7 common mistakes

Remember the common “kitchen” situation: what kind of potholder do you grab the metal handle of a hot frying pan – dry cloth or wet / wet? I am sure that after a moment’s thought, you will choose the dry option. So the insulation must always be dry. In factories, during production, it is packaged in packaging (often shrinkable) film and is sufficiently well protected from climatic moisture. But it is worth removing the film … Therefore:

  1. Unpack the insulation a day before use and always under a canopy, or even better – in a house to be insulated.
  2. After fixing the insulation on the wall, immediately proceed to its cladding with a plastering method or with safety panels (siding, etc.).
  3. Do not leave the heaters open for a long time, risking soaking them “to the skin” by the summer slanting rains.

Mistake # 6. Choosing flexible mats instead of rigid boards

On the construction market, you can find 2 options for thermal insulation materials – flexible mats and rigid boards. At first glance, these are exactly the same materials. So what to choose for facade insulation?

Insulating a wooden house: 7 common mistakes

If you decide to opt for mats, then you will be mistaken, since over the years, the insulation located in an upright position begins to sag here and there, forming cracks into which cold air rushes – the very cold bridges that disavow all the consumer beauty of modern insulation.

Rigid slabs keep their dimensions unchanged throughout their entire service life. It is quite possible to walk on the slabs laid on the roof structure without losing the quality of thermal insulation.

Why, then, are flexible mats made? – They are indispensable for insulating horizontal surfaces – underground space and interfloor ceilings. There, in principle, they cannot sag and form gaps for the consumption of heat.

Mistake # 7. Incorrect determination of the thickness of the thermal insulation layer

Insulating a wooden house: 7 common mistakes

Here it can only be confirmed that with the thermal insulation of a log house, two layers of material 50 mm thick, placed one on top of the other, will be sufficient. I’ll make a reservation that two layers are enough for the climatic conditions of central Russia. In the North, three layers of insulation will have to be put on a wooden wall, and in the southern regions it will be possible to restrict oneself to one. published by econet.ru

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PS And remember, just by changing your consumption – together we are changing the world! © econet


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