In our review, we will tell you about the technology of facade insulation with mineral wool and foam. Materials have optimal characteristics that determine their successful use as insulation elements of the facade. Let's note the key advantages of mineral wool and foam.
Insulation for facade plastering
| Ideal for insulating facades of wooden houses. Here, mineral wool even surpasses foam in its characteristics, according to experts, since it allows air to pass through better. |
The wooden structure will retain its durability precisely when insulated with mineral wool, which supports air exchange.
|The material has high thermal insulation characteristics. It is ideal for insulating facades, as well as loggias with balconies, foundations and attics. It is widely used in modern construction, despite the production of more modern materials.|
| Mineral wool is able to withstand extremely high temperatures. |
This is important when insulating the facades of bath complexes.
|Craftsmen are more willing to work with foam. It has a transparent installation algorithm, allows you to work in a short time, with the highest quality.|
| When the installation of an insulating layer is expected to achieve excellent performance in terms of sound insulation, the best option is to use mineral wool. It surpasses foam in terms of sound insulation parameters. |
|As an insulating material, foam plastic attracts with its high wear resistance. It can withstand sharp temperature changes, negative environmental influences, while maintaining its original technical parameters. Thanks to this, a layer of plaster, correctly applied to the foam insulation surface, will look perfect even after several seasons of use in difficult climatic conditions.|
| Mineral wool is not as dense as foam. It is able to pass moisture, ensure its evaporation, and has convection properties. |
In this regard, many specialists, builders and ordinary consumers - homeowners consider mineral wool to be more environmentally friendly than polystyrene.
|Master builders note that when insulating the walls of bath complexes, saunas and buildings made of natural wood, foam plastic is inferior in terms of environmental friendliness to mineral wool. Polyfoam is not able to provide convection, it does not allow the insulated surface to "breathe", does not support good air exchange.|
We gave a table, considered the advantages of both materials as an insulation layer for the facade, and made some comparisons.
Important! One conclusion can be drawn: when insulating the walls of buildings made of natural wood, mineral wool is of greater interest.
Due to its ability to maintain air exchange and moisture evaporation, it is ahead of the foam. At the same time, it is with polystyrene that the installation of insulation can be performed efficiently, as quickly as possible, with minimal time costs.
Table - technical characteristics of mineral wool
Sizes of slabs
In general, it can be noted that both materials have good performance, they are modern insulation materials, popular and in demand in the construction market.
Table of sizes of expanded polystyrene
It is polymer materials that have become insulation with the longest periods of successful operation in difficult climatic conditions. Studies have been carried out, special tests have confirmed excellent results: the foam does not lose its original technical characteristics even under conditions that simulate 80 cycles of temperature change.
What are the unique performance characteristics of the foam? After all, almost all builders know: foamed-type heaters cannot boast of serious resistance to external influences. They do not tolerate the influence of ultraviolet rays, they can dry out quickly enough, lose their original structure and even completely collapse. But the facade of the building is just under the direct influence of ultraviolet rays.
Thermal insulation of facades with foam
It turns out that the main secret of the effectiveness and practicality of foam as a heater is its combination with a layer of plaster. The material must be plastered in full accordance with the technological principles.
Then he will acquire excellent performance.
A layer of plaster prevents the formation of dents, scratches, cracks and other damage to the insulation layer. Together with plaster, the foam is already reliably protected from mechanical influences.
Obviously, when plastering an insulating foam layer, builders are primarily guided not by aesthetic, but by practical goals. The combination of foam with plaster significantly improves the performance properties of the latter.
Wall insulation with foam plastic outside
Perfectly plastered on foam plastic facade
It's time to consider the step-by-step instructions, in accordance with which you can qualitatively insulate the facade of the building under plaster using foam plastic.
The work includes the selection and collection of all necessary materials and tools. First of all, you will need to level the base for further insulation, make a mortar and fix the reinforcing mesh, and also perform high-quality grouting, priming and leveling of the plaster layer. Already at the final stage, the walls can be decorated with a decorative coating.
Here is an analysis of the stages of work on the insulation of the walls of the facade on the plaster. We will consider the nuances of the process, tell you about the materials and give useful advice from master builders.
It is important to prepare everything you need in advance. The following materials are required:
Prepare everything you need
Also need a set of tools:
Among modern building materials, you can find special plaster compositions that were designed specifically to work with foamed insulation.
The end result, durability and thermal insulation characteristics of the insulation layer largely depend on the quality of the plaster. Plaster mixes are mineral and acrylic.
Pay attention! Mineral plaster is more democratic in terms of cost, affordable, but professional masters always advise acrylic compositions, since their characteristics are much higher, fully justify the cost.
Mineral-type plasters are made from sand with cement. In the first period, the material copes with its tasks with dignity, but the total period of successful operation is short and is about 2-3 years.
After this time, it is already possible to expect a violation of the integrity of the plaster layer, the appearance of cracks.
Thanks to the cement in its composition, this plaster is the most durable among all types of this material
Decorating the facade of the house with plaster
Acrylic plasters are more expensive than mineral plasters, but their cost pays off completely due to the long service life. One drawback can be distinguished: under the influence of ultraviolet rays, acrylic gradually loses its saturation tone. But the mixture has many advantages:
Craftsmen prefer acrylic.
Acrylic textured plaster
Acrylic plaster is usually sold ready-made
Now we need to start leveling the walls. This is the first stage of direct work, very important. The overall quality of the insulation layer and installation work will depend on the evenness of the walls. Polyfoam is mounted with plates, and the joints between them must be strictly at the same level.
Otherwise, thermal insulation will not work. The evenness of the foam panels relative to each other is checked quickly: they are carried out with a wide spatula or with a rule.
Installing the base / plinth profile
Base / plinth strip for foam
Option for fastening the corners of the profile - at 45 degrees, using a plate and screws
Install the beacon. We will rest on it a sheet of foam
Apply a thin layer of glue
on the primed wall
Scheme of applying glue to the sheet
The sheet is installed on the profile and pressed against the beacon
We pull the cord to control the plane
Align the row by tapping the sheets with the rule. We check that the gap is the same
Set the second row to the first
It is not recommended to install more than two rows at a time - you need to wait for the glue to set
Check the board level
Sheets are staggered
Seams between foam blocks must be ideally sealed.
All excess foam is removed. The base is thoroughly cleaned after leveling.
After the glue dries, install plastic dowels.To do this, we drill holes with a puncher
Insert and hammer in the dowels
Fixing the sheet with a dowel
Plates are fixed dowels
Important! The rough surface should be perfectly leveled. In the process of plastering, it is extremely difficult to hide defects, almost impossible.
In addition, the unevenness of the surface of the foam plates will lead to a loss of the thermal insulation properties of the insulation layer.
Remember the advice! Expanded polystyrene is a fairly smooth material, its adhesion is low. This makes it difficult to glue the surface. The optimal solution is to quickly increase adhesion by making many small pores on the surface. You just need to gently walk over the insulation with a needle roller.
The glue will penetrate perfectly into the smallest pores.
It is advisable to use ready-made building mixtures designed specifically for plastering foam. Craftsmen highly appreciate products from Ceresit, Ecomix. It is common practice to use one mixture at a construction site.
A good solution is to find the most suitable two-in-one composition: a universal adhesive plaster can be used to fix foam boards to the facade, as well as to create a protective surface. Separate compositions are also presented on the market: one mixture is prepared for fastening, and another for plastering.
It is important to correctly calculate the amount of required building mixtures. If we talk about one square meter of the surface of the reinforcing mesh, then 6 kg will be spent on leveling, and 4 kg on plastering.
Mix the solution in full accordance with the recommendations in the instructions.
The only advice: experienced craftsmen believe that the solution can be made a little more liquid, then it will have increased penetrating abilities, it will saturate the insulation well.
Mixing the glue
First, the mesh must choose the right one. Since we are talking about the insulation of the facade, that is, external work is being carried out, it is advisable to choose the most dense mesh. The denser the mesh, the better the plaster layer will apply to it.
There is a drawback: the corners will be a little more difficult to shape. But masters with experience will cope with this easily, they will just spend a little more time. Look for alkali resistant mesh. Good mesh density for foam insulation is 130-160 g / m2.
Reinforcing mesh for foam insulation
Remember! Do not apply the plaster layer to the styrofoam! The plaster will quickly begin to crack and collapse.
Only reinforcement with a mesh ensures the durability of the insulation-protective layer, consisting of foam and plaster.
First you need to strengthen the door, window slopes, as well as the corners of the building. This is done according to this algorithm.
It is necessary to guide the spatula from the center to the edges, from top to bottom. The mesh must be completely immersed in the solution.
Reinforcement of corners
There is also an algorithm for fixing the reinforcing material on the walls of the facade, which is followed by all professional builders.
Reinforcing mesh laying
Fasten the fabrics with an overlap
Photo - mesh gluing
Cutting off excess mesh
The reinforcing layer must be rubbed.
To do this, use special plastic floats or emery cloth. Mashing is carried out in a circular motion. If the emery gets wet mortar, it must be replaced.
Very important! Grouting should be carried out only after the building mixtures have completely dried. When it is cloudy outside, it will take at least a day to dry, and in hot weather, mixtures and plaster dry for 2-3 hours.
We clean the nodules
The leveling layer is applied in the next step. It is also necessary to prime the surface.
Movements should be confident, smooth, precise. When you get the best quality grout, you will need much less time and plastering material for leveling. Even two millimeters of plaster is enough.
This way you will be able to make inconspicuous seams.
When the surfaces have already been treated with plaster, trowel down.
Tip. Building mixtures must not dry out. The plaster layer is rubbed off after a maximum of three days so that the leveling layer does not have time to dry out.
This makes work faster, easier and more efficient.
Priming must also be done. Professional, responsible craftsmen never miss it. It is the primer that is able to increase the adhesion of the finishing surface and protect it from fungus. Masters recommend using a special primer: it can prevent the surface from getting wet, the formation of mold and mildew.
Apply the primer with a roller. A foam roller or a short nap model will do.
Primer deep penetration
Remember! Before carrying out decorative finishing, you must wait until the soil is completely dry.
It is necessary to choose special plaster mixes developed for facades.
They are highly resistant to atmospheric and temperature extremes. The characteristics of the plaster determine the additional components, as well as the type of binder. Silicate, acrylic and mineral plasters are presented.
Preparing plaster mortar
When the surface is half dry, you can start mashing. That is, it is important to feel the degree of drying: the plaster is already well fixed, but at the same time it is still easily corrected. Rub the layer using a special grater.
Remember a few more important points! Atmospheric indicators are of great importance. There should be no strong wind, the maximum air humidity is 70%, and the temperature should be from 5 to 25 degrees.
Result of work
Mineral wool can withstand high temperatures, has good thermal and sound insulation properties, while ensuring fire safety. In addition, pests are not scary with such a heater, since rats and mice are not interested in this material. Unfortunately, in terms of environmental friendliness, mineral wool is not so good: it can indeed release toxic substances, but in minimal doses.That is why, as a facade insulation, it fulfills its functions quite adequately, since it is located in the open air, under a layer of plaster. This is not about the danger to human health.
One of the possible schemes for installing mineral wool on the facade using modern materials
Let's consider the insulation technology step by step.
Starting profile for mineral wool
In order for the fasteners to be accurately calibrated, a building level with a level is needed. It is imperative to fix the planks securely.
There should not be too much of it, but the insulation must be soaked well.
Basic principles of the correct location of insulation boards
Facade insulation technology
Apply a layer of decorative plaster
Apply a finishing coat
Remember! It is important to monitor the weather conditions. It is impossible to install an insulation layer at a high air temperature, above 27 degrees.
Air humidity should not be higher than 80 percent. Sometimes the installation of insulation takes several days. In this case, the masters must protect the facade with a thick mesh to protect the insulation from external influences.
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