How thick insulation to take to the balcony it was warm in the cold: will there be enough "Pyaterochka Penoplex"

I do not want to upset you, but "Pyaterochka" and even "desyatochka" Penoplex bad option for normal insulation balcony. For the sake of your health and family health, forget about using extruded polystyrene insulation in the walls. He has another appointment. Characteristics of the materials I have devoted a separate article.

For a general understanding of the issue we start with the theory, and then define the specific insulation thickness.

For normal operation of the house wall materials should have water vapor permeability, that is to say "breathe." Concrete, brick, plaster - they "breathe", but the extruded polystyrene "not breathing." When you place it too thinly, all trouble comes.

Imagine for a moment a situation in which you have warmed balcony Penoplex. Decided to save and took the plates, for example, a thickness of five centimeters. In fact, not so important how much you have saved. It is important that the layer is insufficient to warming.

Balcony closed. Winter has come. The walls, with the contained water vapor, were frozen. When you go out to the loggia, there is already uncomfortable. Cold. To warm her, opened the door, and can put a heater.

The temperature has risen. Penoplex warmed in the entire thickness. He is beginning to heat up bearing wall. Present therein a pair of liquid melted. Moisture can not escape to the outside - the frozen wall street not let me. Leave surplus moisture inside does not Penoplex. Liquid condenses on the boundary walls and insulation. One, two, three... ten cycles and there is mold. To avoid this, you need to perform at least two conditions:

• insulate the loggia vapor-permeable material.
• Choosing insulation thickness so as to avoid moisture condensation in the wall.

Universal thickness no insulation and can not be. Each case is individual. For the calculation of use of the formula SNiP of Thermal Engineering. I understand that the document is old and rip out the verification of the general formula of calculation is not entirely correct. But when designing it always helps when you need to quickly estimate the heating equipment. And it will help you in calculating the insulation of the balcony. At least it's better than doing as the "one grandmother said."

We use the formula:

All the values ​​can be found in SNIP. But the thermal conductivity of the insulation is better to take the technical characteristics of the particular material. I shows an example of calculation of the concrete insulation wall thickness of 16 cm loge. We have received a minimum thickness of 13 cm of insulation. Even on these figures it is clear that the "Pyaterochka" and Penoplex question.

If advisers recommend to take a "standard" insulation thickness, better check the "standard" for yourself.

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