Scope and properties of mineral wool
This material is used primarily for heat and sound insulation. It is used for all types of roofing, for insulation of horizontal and vertical structures both inside and outside the premises, for industrial equipment, pipelines, water tanks, in general, for all surfaces from t to +700 ° C.If we talk about its advantages, we can distinguish the following:
- Waterproof. Despite the fact that this material has the ability to skip steam, from the inside it does not absorb it. Therefore, the entire structure is protected from dampness and "wetting".
- Has high thermal insulation characteristics due to its special structure.
- Provides with the optimum air exchange , and the probability of condensate occurrence is minimally low. This leads to the creation of a favorable microclimate in the room.
- Good sound insulation .The material has acoustic properties due to its elasticity.
- Fire resistance .Mineral wool provides complete fire safety to the entire building and does not spread the flame.
The main and main drawback is harm to human health. According to many experts, minvate releases phenol-formaldehyde resins, which are not safe for people and lead to various diseases.
Because this material even wanted to ban for the construction of residential buildings. However, as the producers themselves say, the percentage of such substances in mineral wool is very low. In support of this, they show the various environmental and SEZ certificates that Rospotrebnadzor issues after the tests. Who to believe, choose you.
Technology of thermal insulation of facades with mineral wool: prepare the base
Before you can insulate the external walls with mineral wool, you need to properly prepare the base. From the facade are removed extraneous and sticking objects( including drainage systems, nails, fittings).If you do not remove these metal elements, then when the temperature changes, the water condensate will cause corrosion. And the rust that has appeared can leak out, which will ruin the whole appearance of the building. Also, the old coating is removed. For this it is important to know how to remove old plaster, paint, etc.
If there is mold and fungus, then it is also important to remove them. After you have cleared the base, the wall is conventionally divided into zones, making a kind of suspension map. In each zone are placed vertical, diagonal and horizontal sags( or, more simply, ordinary kapron cords).
They are necessary in order to study the geometry of the surface. And if in the future you will mount a heater with a thickness of 50 mm, then the sling is made to a height of 60 mm. It also saves you from having to check the curvature of the walls with a level. Next, the surface is ground, well, then the minvate is applied for the facade.
The technology of warming the facade with mineral wool: we apply insulation
To ensure that the mineral wool facade was securely attached, use special plastic anchors. In some cases, of course, they can not be used. However, as a rule, in such situations, cracks appear, and the insulated surface collapses. This is due to the fact that this material has a large mass and it is important nevertheless to properly attach it to the base. So, how is this done?
With the help of dowels fix the guide profiles, which will hold the whole structure. Next, prepare the glue for the insulation. For example, a good mixture is considered ST 190 Ceresit .It is specifically designed for stone and mineral wool. After covering it with the wrong side of the material. Heat insulation is applied to the wall. In the next step, when you have all attached to the base, create a reinforced layer on the surface.
The adhesive is applied, and the felt is embedded in it, and then again covered with an adhesive compound. Thus, reinforcement is done. But if you think that the insulation of the facades with mineral wool is over, then you are mistaken. At the final stage, the facade decorative plaster must be used. It will not only give an aesthetically attractive appearance to the entire building, but also fulfill a protective function.