It is quite possible to cope with the insulation of a country house on your own, it is only important to know some of the features and observe the technology. We will tell you about some of the important aspects of mineral wool insulation for siding.
Features of the
Thermal insulation of a wooden country house is associated with certain rules and characteristics. So, it is not always necessary to insulate a house immediately after construction: most wooden houses are warm enough by themselves, without additional insulation. However, if a house of wood was built many years ago, and cracks have formed in the timber or logs due to moisture and frost, then the insulation of the house outside with mineral wool becomes really necessary.
Siding will be useful for small country houses, when the thickness of the wooden walls does not meet the requirements of thermal insulation and the owners have to spend too much money on heating. Vinyl siding is an affordable finishing material that has a long service life and is easy to install. Siding alone is not enough for full-fledged insulation, therefore, mineral wool is most often used as an external insulation for siding.
To maintain an optimal microclimate in the premises after insulation work, the following conditions must be observed:
- Before carrying out thermal insulation work, the tree is treated with special compounds against fungi, mold and woodworm beetle.
- Insulation should not block the outlet for water vapor, therefore, strictly follow the appropriate technologies when performing work.
- A vapor-permeable membrane (also called a diffuse windproof film), which is fixed on the outside of the insulation, will help to maintain the moisture balance. Even if water suddenly seeps under the siding, it will not get into the stone wool layer or the wooden walls.
Advantages and disadvantages
Any siding panel is easy to replace with your own hands, besides, it is a durable and durable material. Both mineral wool and siding are not heavy materials, so even one person can handle the installation.
The humidity of the wood at home depends on the difference between the outdoor temperature and the temperature in the room., and if the indicators differ greatly, then the tree begins to actively absorb moisture from the inside, giving it away from the outside. This process means that the house "breathes", not allowing moisture to accumulate in the structure of the tree. External insulation will shift the “dew point” to itself, and wooden buildings will be protected from moisture.
If the house is located near a noisy highway, then mineral wool insulation will help create excellent sound insulation. All types of mineral wool have good thermal insulation properties.
Neither rock wool nor vinyl siding is damaged by insects or rodents. Also, fungi and mold do not develop on these materials. Mineral wool has excellent fire resistance, it is versatile and suitable for buildings built in warm climates as well as in cold ones.
Scope of application
Mineral wool is widely used today in a variety of designs. So, with the help of it, roofs are insulated, ceilings and walls are insulated. Minvata will keep the heat and microclimate of not only a log house, but also a brick house. Thermal insulation with this material will make living in stone buildings more comfortable.
Basalt mineral wool serves as an excellent fire barrier, therefore it is often protected by ventilation shafts and similar structures.Due to the fact that basalt wool is resistant to high humidity, it can be used to insulate baths and saunas, to protect "wet" facades and even ship structures.
Basalt wool is suitable for protecting pipelines, as this material is resistant to both rising and falling temperatures. If serious loads are expected on a surface thermally insulated with mineral wool, then mats of the highest rigidity should be chosen.
Experts recommend not to use expanded polystyrene for external insulation of the facade of a log house. and other synthetic or foil-coated materials, as they do not allow water vapor to pass through, which means they will not allow the house to "breathe". Improper insulation can lead to destruction of wood due to mold and mildew, harmful to human health. That is why it is best to insulate wooden houses with mineral basalt insulation - mineral wool.
This insulation is made from a variety of materials - from blast furnace slag, glass and sand to recycled volcanic rocks such as basalt. The best option is considered to be basalt (stone wool), which is considered very strong and has a very low hygroscopicity.
The technical characteristics of stone wool are as follows:
- the thermal conductivity of the material ranges from 0.032 to 0.048 W / m × K;
- moisture absorption - no more than 2% of the volume (or even less);
- stone wool can be of different densities, it depends on whether you will use stone wool in slabs, mats or rolls;
- the material is not flammable, which is important when insulating wooden walls.
Outside insulation is usually performed with semi-rigid basalt mats with a density of 80 to 150 kg / m3. These mats come in different sizes, so you can choose the one that suits you best. Experts do not recommend using basalt wool in rolls to insulate walls, because over time, the roll material sags.
The thickness of the heat insulator depends on the region in which the house is located. The more severe the winter, the thicker the insulation layer should be. In Central Russia, this layer is 150 mm, while the insulation is mounted in two layers (100 mm and 50 mm). If you need to increase the thickness of the insulation, then you will have to mount another row of lathing.
How to insulate?
Wall insulation technology involves certain preparatory work. The walls are cleaned of dust and dirt, at the same time noting all the gaps and crevices - it is convenient to do this with a white marker, so you will definitely not miss even the smallest gaps during further work. Further, the walls are treated with a wood preservative. After drying, the cracks are sealed with a special latex sealant for wood, which will prevent the appearance of "cold bridges" - the ways of penetration of cold air streams into the house. If there are too many cracks, then sealing them with a sealant will be expensive; in this case, tow, moss and any natural materials are used for sealing.
Before starting the installation of mineral wool and siding, it is necessary to install the frame (crate). For this, a timber or a galvanized profile is suitable, and experts prefer wood. The fact is that with changes in street temperatures, condensation can form on metal elements.
We must not forget about the installation of guides and constant monitoring of surfaces with a water level, since all elements of the crate must be in the same plane. The guides are attached not only to the corners of the building, but also around doors and windows.
Before starting work on fixing the timber to the wall, it must be treated with a wood preservative. While it dries, the places of future fastenings of the guides are marked on the surface of the walls with a white marker.
The distance between the elements of the lathing is usually made 5 centimeters less than the width of the insulation mats, which is necessary for the installation of the mats tightly, "spur".
If the walls of the house are very uneven, then in some places it will be necessary to strengthen wooden lining under the crate. The vertical or horizontal fastening of the guides depends on how you plan to fasten the siding in the future. If vertical (standard method), then the rails must be mounted horizontally. The lathing can be fixed with screws or nails, and for additional strengthening it can be fixed with metal corners. When installing the guides, take into account the clearance (up to 5 cm) for ventilation.
After installing the frame, you can proceed with the installation of mineral wool. The mats are inserted between the frame guides, starting from the bottom. It is important to lay them tightly, without gaps and crevices. If there are two layers of mineral wool, then the one that is thicker is first laid. If more than two layers of insulation are needed, then the second is fixed to the first crate. For example, horizontal - vertical.
In general, it is quite easy to lay the material. Difficulties can arise only with the space around doors and windows. In order that there are no gaps left, you need to cut mineral wool strips of the required width and fix them in the remaining free space. Mineral wool layers should not bend outward.
After laying the layers of insulation, the walls are covered with a windproof membrane. Its pieces are connected with construction tape or fastened to the elements of the sheathing using a construction stapler.
After all the work, the structure needs to be "stitched" with special plastic fasteners - "fungi". They will press the insulation against the wall and will not allow it to "slip".
The next step is to install a counter-lattice for attaching the siding. This is done directly on top of the windproof membrane by screwing on the bars to which the siding will subsequently be fixed.
Siding fixing work is within the power of even home craftsmen. You should start by installing the ebb if the building has a protruding basement. If there is no need to install an ebb, then you can start securing the siding by strengthening the "starting strips" at the bottom of the structure. Starter strips can vary greatly from manufacturer to manufacturer, and can be distinguished by the lock connection that allows the panels to be snapped into place.
The siding is fixed with self-tapping screws in the central part of the slotted holes in the planks. After fixing the vertical and horizontal strips, you can proceed to fixing the corner profile, while checking all the details with a level - they are always strictly vertical or horizontal.
Special finishing strips are also located around frames and doorways - then platbands are fixed in them, allowing you to hide the end of the siding elements.
If you are still inclined to install a metal frame, then do not forget to lay insulation in all grooves of the profile. In general, the installation of a metal structure does not differ much from the installation of a wooden one, but additional elements must be fixed - direct suspensions (profiles will be installed on them). Straight hangers can also be used when securing the wooden structure of the lathing.
Tips & Tricks
- Domestic mineral wool is heavier than its imported counterparts, so if you need to take care of the weight of the structure, you should choose an imported manufacturer.
- Insulation work must not be carried out if the wood is damp. It is necessary to let the tree dry out, otherwise a fungus will inevitably form.
- Always leave a gap between the siding and the insulating material to allow air to circulate and excess moisture to evaporate.
- Experienced craftsmen, when choosing the thickness of the insulation, recommend focusing on the region where the building is located. So, houses built in Central Russia, the North-West and in the Urals require insulation with a layer of 20 cm.For the southern regions of our country, 10-15 cm will be enough, but for Siberia - at least 35.
- According to the recommendations of experts, one of the best heaters is considered to be “Beltep Facade 12” (“basalt wool”).
- A vapor barrier film is not suitable for protecting wooden walls, as it does not allow the house to "breathe". As a result, under the insulation, the building will begin to rot and collapse.
- All siding elements are fastened with self-tapping screws, while they cannot be tightened too tightly.
- Unfold the siding panels before starting work and mark the attachment points. So all the fasteners will be at the same level, and the structure itself will turn out to be stronger and more even.
- There is no need to try to fit the panels to each other as tightly as possible - there should be a small gap (5 mm) between them. So the siding will not suffer from temperature changes, freely expanding or narrowing.
How to insulate a house with mineral wool for siding, see below.