The thermal insulation characteristics of a bar with a section of 150x150 are insufficient to ensure comfortable living in a house in the cold winter. In this regard, the owners of such a building inevitably ask themselves the question: how and with what to insulate the house? According to the rules of heat engineering, external insulation is much more effective than internal insulation. Therefore, first of all, you need to attend to the choice of an optimal thermal insulation material for specific conditions, suitable for use outside the house, and find out all the nuances of installation.
Thermal insulation of the house from a bar outside
At the stage of preparation to the external insulation of a wooden building, several questions need to be resolved:
Regardless of what kind of heat-insulating material will be chosen, walls from a bar 150x150 need to be prepared.
First of all, it is necessary to conduct a visual inspection and make sure that there are no signs of wood decay, insects harmful to the tree, the need for additional fastening of the timber and finishing elements for window and door openings.
In the photo, a house from a bar before insulation
At the same time, they decide whether the walls need caulking. If empty slots are seen, then they must be filled with the appropriate material before installing the insulation. Caulking the walls is a simple process, but laborious. Knowing the rules and tricks of this business will greatly simplify its implementation.
What is caulking of walls
Three materials are traditionally used to eliminate gaps between the bars:
Overview of materials for caulking
In the process of work, craftsmen use special wooden devices in the form of spatulas with a thin blade. But an ordinary narrow spatula is also suitable for independently performing the task.
Tool for caulking a log house
Next, you need to choose the most suitable caulking method. There are two of them:
The first is optimal if the slots are not wide, the second is suitable for deep and long gaps. When caulking, the tow fibers are spread along the gap in an even thin layer, while driving it into the gap with a spatula. The work must be done slowly and carefully, trying to seal the insulation as efficiently as possible. The tow is driven in layer by layer until the gap is filled.
Laying in a set is performed as follows: from tow, they form bundles or balls corresponding to the size of the gap, and drive them into it using a spatula and a hammer.
Regardless of the chosen method of caulking, work begins from the bottom of the wall.
Methods of caulking a wooden house
The modern market offers many solutions for the insulation of a wooden house. The choice largely depends on the climatic conditions of the region of residence. For southern latitudes, one insulation will be optimal, for northern ones - another. Therefore, when choosing a material, they are guided by its main characteristics:
The main characteristics of thermal insulation materials
The following thermal insulation materials are suitable for external insulation of a house from a bar 150x150:
Comparison of insulation
Materials for house insulation
Mineral wool has excellent thermal insulation characteristics, but has one significant drawback: hygroscopicity. Since damp insulation is not capable of retaining heat with high quality, the use of mineral wool in rolls or slabs requires steam and waterproofing of the walls and foundations of the house. This significantly increases the cost of external insulation.
Mineral wool roll
When choosing fibrous materials, consider the following points:
Mineral wool slabs
The second requirement is due to the fact that the laying of mineral wool and its analogues requires wall cladding by ventilated facade technology. Therefore, it will not be possible to save on finishing work. If there is any doubt that the mineral wool under the cladding will remain dry, it is better not to use this material.
Mineral wool. Insulation specifications
There are many myths regarding this insulation.
One of them is convincing that styrene, which is harmful to humans, is released into the environment. All these claims have long been debunked by laboratory research. The safety of the foam is confirmed by the sanitary-epidemiological conclusion 63.01.06.
224.P. 001216.04.03 dated April 7, 2003, the conclusion 01-188 dated 25.
04.00 of the Research Institute of Hygiene and Health Protection of Children and Adolescents of the Russian Academy of Medical Sciences, the Conclusion No. 03 / PM8 of the Moscow Research Institute of Hygiene. F.F.
Erisman.Therefore, this insulation can be used fearlessly not only for external, but also for internal insulation.
When choosing a foam, it is important to pay attention to its density. The higher it is, the lower its thermal conductivity. It is believed that the density of the foam corresponds to the digital indicator of its brand.
But this is only partly correct. For example, the density of C-25 foam ranges from 15.1-25 kg / m3. In choosing a material, a table of its characteristics will provide significant help.
|Foam grade||Density (kg / m3)||Compressive strength at 10% linear deformation||Thermal conductivity (W / mK)|
|PSB-S-15||up to 15|| 0. |
|no more than 0.042|
|PSB-S-25||15.1-25 kg / m3||0.1 MPa||no more than 0.039|
|PSB-S-35|| up to 25. |
1-35 kg / m3
|0.16 MPa||no more than 0.037|
For external house insulation from a bar 150x150, you can use any brand of foam. Manufacturers offer canvases of different thicknesses: 5 cm and 10 cm.When choosing a material, you need to take into account that for facade insulation it is better to buy PSB-S-35 foam with a thickness of 5 cm than PSB-S-25 foam with a thickness of 10 cm.
The cost of these materials almost the same, but the thermal insulation effect will be more significant.
Comparative characteristics of foam and extruded polystyrene foam
EPPS has almost the same chemical composition as foam, but has a lower thermal conductivity, higher flexural strength, and lower water absorption. A significant difference in performance is due to the way these materials are produced.
EPSPS can be operated at a temperature range of -50 ° С to + 75 ° С
EPSPS is ideal for external insulation of a house from a bar 150x150. The only drawback of this material is its relatively high price.
A plate of extruded polystyrene with a thickness of 2 cm in terms of thermal conductivity is comparable to a sheet of foam plastic with a thickness of 3 cm and a layer of mineral wool 4 cm thick.
Polystyrene foam "Technoplex"
EPS can be glued to building walls, but you need to choose the right adhesive. The following formulations should not be used for styrene-based materials (EPS and foam):
It is recommended to use the following adhesives:
Foam glue " TechnoNIKOL "
Ceresit CT 85
illbruck PU 010
This material has long been proven in practice to be suitable for thermal insulation.
Foamed polyethylene has a lot of advantages. Among them:
When choosing this material, you should know that it comes in the spirit of types: LDPE (high pressure) and HDPE (low pressure). Foamed polyethylene products are available with one-sided and double-sided foil.
Foamed polyethylene mats, duplicated, laminated with foil
The most popular are the following:
5-4 cm thick);
Types of Penofol
Foamed polyethylene materials are advantageous in that they do not require a vapor and waterproofing layer. This is due to their absolute non-hygroscopicity. Therefore, when sheathing the outer walls of a building with foamed polyethylene, you can save a lot.
Sprayed polyurethane foam differs from the above materials not only in the way of laying.
Sprayed thermal insulation
It has many other advantages:
Spraying heat insulator
All this makes sprayed PU foam the best material for external insulation of a house from a bar 150x150. The only drawback of this method is its high cost.
Spraying PPU requires not only special equipment and skills in working with it. Therefore, you will have to pay not only for the material, but also for the services of specialists.
Insulation of the walls of a wooden house outside with polyurethane foam
Scandinavian windbreak boards are made from softwood fiber and are 100% natural thermal insulation material.In their production, no chemical binders, no glue or resins are used. At the same time, a plate with a thickness of 12 mm for thermal insulation is equal to 44 mm of wood.
thermal conductivity of the material λ10 ≤ 0.045 W / mK
Actual use over 70 years.
House, sheathed with Izoplat slabs with partial installation of the facade.
Isoplat nailed plate
The walls of a wooden house are built of highly hygroscopic material. The tree can absorb moisture and deform at the same time.
Despite the fact that the construction timber has a low moisture coefficient, environmental influences inevitably change this indicator. Therefore, deformation of the walls can be observed in wooden houses. It is insignificant, but inevitably affects the geometric shape of window and door openings.
When insulating a house from a 150x150 bar outside, it is necessary to take into account that a ventilation gap is required through which moisture will escape from the tree. Thus, no damage will be done to the walls.
A cladding layer must be built over the insulation laid on the outside of the building. Therefore, the best technology for insulating a house from a bar is a ventilated facade.
Its schematic diagram includes the installation of several layers of materials (direction from wall to street):
Approximate layout of the ventilation facade
Ventilated facade for a log or log house
Regardless of what kind of insulation will be used, it is necessary to observe the order of laying materials and not forget that there must be a gap of at least 1 cm between the heat insulator and the cladding.
Making a ventilation facade with our own hands
For installation of spacer strips, use beams with a section of 20/20 mm or edged boards with a thickness of 20-25 mm.
For fastening wood, nails or wood screws are used. The optimal step is 60-80 cm.
Scheme of the insulated facade
Vapor barrier film is sold in rolls. Laying the canvases begins from the bottom of the wall and gradually moves up. The vapor barrier is fixed with a construction stapler with an overlap of 10-15 cm.
Material for vapor barrier
Use the same material as for the 1st tier: bars or boards, but the thickness of the lumber should be different: 5-10 cm and correspond to the thickness of the selected insulation ... Boards (bars) are not fixed horizontally, but vertically. It is important to consider that the distance between the lathing posts must correspond to the width of the insulation.
Installation of the ventilated facade frame
Example of fixing a wooden frame with corners
Mineral wool or foam sheets are placed in the space between the posts of the 2nd tier of the crate. They are attached to the wall of the house using plastic dowels with a wide dish-shaped head.
The windproof film is installed the same as the vapor barrier. Attached to the crate with counter battens.
The diagram shows a windproof membrane and siding mounted over it
Installation ventilated facade with plastic siding
The finishing material can be used:
Facade panels for brick
High-quality external insulation of a house made of 150x150 timber will provide a comfortable microclimate in residential premises and will reduce the cost of heating the building.
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