Types of mineral wool: glass wool, slag wool, basalt wool

Insulation rock wool - one of the mosteco-friendly materials. Like any other material designed to retain heat, it uses air as the most efficient heat insulator. To "fix" layer of air and force it to isolate the room from the cold, his "canned" using fibrous materials in their state resembling wool.

The fibers can be organic, that is,vegetable origin, such as cotton wool in the pharmacy, or inorganic, ie mineral. Since only suitable manufacturing incombustible insulation materials used for this purpose based on mineral wool fibers.

Types of mineral wool

Minerals from which you can get thin andlong fibers, not so much. This is primarily - glass, various slags, and some rocks, such as basalt, after appropriate processing.

Consider the most popular insulation material produced on the basis of mineral substances. The leaders of the three are: glass wool, slag wool and basalt wool.


Insulation glass wool - one of the mostcommon and relatively inexpensive materials. It has a fibrous structure, color - from light to dark yellow. The feedstock for the production of - sand, limestone, soda, dolomite, borax, glass.

This insulation is characterized by lowvalues ​​of thermal conductivity, good makes vibration loads, and a well-compressed, reducing the amount of six times, thus reducing transportation costs.

Compared with insulation basalt wool, itcheaper and more simple stuff. It is soft and can be used where there is no serious loads. Not long ago, manufacturers started production of semi-rigid plates, which can be isolated ventilated facades. Glass wool is used in the form of cylinders with insulation piping.

The most well-known manufacturers in the market of this type of insulation: «Isover», «KnaufInsulation», «Ursa».

glass wool insulation

Stone wool

The main plus of the insulation basalt wool onother than - the possibility of obtaining materials with different density, shape and stability to mechanical stresses. Make it out of gabbro-basalt rocks - diabase, basalt, gabbro, adding carbonate rocks (limestones and dolomites).

thermal conductivity index from the resultingmaterial is lower than that of glass wool insulation, better and other indicators, such as resistance to vibration. It is less absorb moisture and does not burn. Basalt wool may be possible to obtain a lower density, and then it will be flexible, or raised - and then it turns durable material.

Given that of basalt fibers can beproduce materials with different strength characteristics, to give them a different shape, and apply a variety of coatings, insulation from it is more versatile than other types of mineral wool.

Elastic, soft stone wool productsused where it is not high mechanical loads, low buildings (up to four floors) with insulation wells. Denser species can be used in the construction of buildings of great height. It provides sound and thermal insulation, is safe in terms of fire requirements. Figured products from this wool is isolated from the external temperature pipes and pipelines.

When the heater will operate the mechanical stresses applied rigid insulation basalt wool modification.

basalt wool

One of the main criteria for the applicability of this orother insulation is its resistance to mechanical stress. Previously amplified load kept only high-density materials, but today there were materials and can withstand considerable efforts at low densities. In any case, it is necessary to take into account how large the load it will have to experience in selecting the material.

So, if you want to attach insulatingbetween the sheets themselves hardly suitable insulation wool, or slag wool, since they are very fragile rupture. In this case, you should choose wool from basalt fibers. When the roof insulation is much more important than another indicator of how well it can withstand the pressure and compression.

Stone wool is produced on a substrate foil or web of glass filaments, for greater strength it can sew with wire or glass fiber yarns.

The most well-known manufacturers in the market of this type of insulation: Rockwool, Paroc, Nobasil, Danko-Izol, Technonikol.

basalt wool on the substrate foil

slag wool

Another one of the best available speciesmineral wool - slag. It is made from blast furnace slag (vitreous or rocky mass, which is a departure in the steel mills, the smelting of pig iron in blast furnaces).

Indicator thermal conductivity of the materialIt is quite high, but it has some significant drawbacks. Slag easily and quickly absorbs water, which imposes restrictions on its use in wet areas, for example for thermal insulation of facades and bathrooms. Thus it starts chemical processes leading to an increase in acid content, and hence the destruction of the surrounding metal wool elements. Another disadvantage - low resistance to vibration. Currently, almost never used.

slag wool

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