Technical characteristics of mineral wool, its brand and selection criteria

By Admin | Construction Materials
28 April 2016

aspire to live in peace and comfort, we will first of all try to protect your home from the cold and ambient noise.Many centuries people have sought protection from the summer heat and winter cold.Please use fire for heating fires and fireplaces, later joined by electric heaters.

But if used as insulation insulation mineral wool, then we can escape from the cold and from the heat in the summer.Mineral wool technical characteristics that we consider in this paper has several varieties, each of which has its advantages and disadvantages, so before you buy it is necessary to study them carefully.Next consider what materials may be considered mineral wools and their properties.

Technical characteristics of mineral wool


  1. What types of mineral wool produced today
  2. Fiberglass
  3. Slag
  4. Stone wool
  5. about the brand mineral wool and aboutwhere applicable, each of them
  6. What are the disadvantages of mineral wool
  7. few tips for choosing the miner
    al wool
  8. Videos: Properties stone wool

What types of mineral wool produced today

According to GOST 52953-2008, heat insulators belongingto the class of mineral wool can assume three materials: glass fiber, a fiber which is made from slag (slag) and rock wool.All these materials are of different length and thickness of the fiber and different from each other parameters.In particular, they have high resistance to stress, thermal conductivity, moisture resistance and ability to withstand heat.Glass wool, widely used for insulation in the Soviet era and today is quite cheap.But she, unlike slag and rock wool, very spiny.Working with it requires precautions.Now let's talk details about each type of mineral wool and list their characteristics.


This material consists of a fiber thickness of 5 to 15 microns and a length of 15 to 50 millimeters.They make glass wool elastic and highly durable.Here are just working with it is necessary to very carefully - because fragile glass filaments to break, can glare at the skin get into the eyes and injure them.If you accidentally inject pulverized glass and can be easily damaged.Therefore, when using this heater should definitely wear disposable protective clothing, goggles and respirator.Do not forget to protect your hands - wear gloves.

lists the characteristics of mineral wool fiberglass:

  • Thermal conductivity - 0.03 to 0.052 watts per meter per Kelvin.
  • Permissible heating temperature - up to 500 degrees Celsius.The optimum heating will be no higher than 450 degrees Celsius.
  • Permissible cooling temperature - minus 60 degrees Celsius.

Glass wool
It looks like ordinary wool.Slag

This material manufactured from blast furnace slag, has a fiber thickness of 4 to 12 microns, and their length is 16 mm.Since the slag has the property as the residual acidity, in a damp room, they can aggressively work on metal surfaces.In addition, slag very well absorb moisture, so it is not suitable for thermal insulation of facades.In the previous two reasons it is not suitable for the insulation of water pipes, both metal and plastic.In addition, the material is brittle, so prickly when to take it with his bare hands.

slag wool Features:

  • Thermal conductivity (for solids) - from 0.46 to 0.48 watts per meter per Kelvin.
  • maximum permissible heating temperature - up to 300 degrees Celsius.When this value is exceeded sintering the fibers and the material ceases to be a thermal insulator.
  • Hygroscopicity - high.

Stone wool

This species mineral wool fiber are approximately the same size as that of slag wool.But they have a significant advantage - they do not inject.Therefore, working with stone wool is much safer than the material of glass or slag.Its thermal conductivity is from 0.077 to 0.12 watts per meter per Kelvin, and it can warm up to 600 degrees Celsius.By the way, if you are referring to mineral wool insulation, then it is usually talking about a stone wool.

Cutting stone wool
Cutting stone wool slabs.

Of all its varieties has the best parameters of basalt wool.It is made as a normal rock of gabbro or diabase.However, rock wool is still present blast furnace slag, and mineral batch components - clay, limestone and dolomite.These impurities contribute to increased mass flow, they may constitute up to 35 percent of the entire material.A binder based on formaldehyde resin contains less - from 2.5 to 10 percent.Reducing the amount of this substance makes the material less moisture-resistant, but the threat of evaporation of phenol is also reduced.This reduces the risk to human health.

wool from basalt is characterized in that no additional components - either mineral or binding - does not contain.Therefore, it can easily withstand heat up to 1000 degrees Celsius.And it can be cooled to minus 190 degrees Celsius, which is absolutely not hurt the insulating materials.Basalt fiber is easily formed into a roll or sheet material as it is convenient to fill mats.And yet it is sold in loose form.Ordinary rock and basalt wool does not burn - if temperatures exceeding the permissible temperature, the fiber material will only melt Speck each other.

Stone wool
slabs of stone wool.

about the brand of mineral wool and where applicable each

mineral wool produced in the form of plates and mats.They are insulated roof, floors and ceilings, internal walls and partitions.You can work with both the smooth and non-standard surfaces.Difficulties in the use of this material does not normally arise.Since the density of mineral wool may be different, in accordance with this parameter, it is isolated several brands.Further details about each of them.

Mineral wool brand P-75

density of this material is 75 kilograms per cubic meter.It is well suited for thermal insulation of horizontal planes that are not subject to heavy loads.In particular, the attic, as well as some types of roofs.More of this brand cotton wrap to retain heat pipe thermal power plants, as well as gas and oil pipes.Manufacturers produce mineral wool and a lower density, but it can be used only where there is no load at all.

Mineral wool brand P-125

material with a density of 125 kilograms per cubic meter is suitable for thermal insulation of floor or ceiling and walls and walls indoors.The low-rise buildings of brick, aerated concrete or expanded clay such cotton may be the inner layer of the wall, consisting of three layers.Material of this brand also has good sound insulation properties.Using it, you can not only insulate the building but also to protect against noise.

mineral wool brand of RV-175

This material is not only compact, but also has a high rigidity.He usually is used for thermal insulation of floors and walls made of concrete or profiled sheet metal.

mineral wool brand LVP-200

This abbreviation means that the slab of mineral wool has a high rigidity.Apply it in the same cases as the previous mark.The only difference is that the VLP-mark 200 can be further used as an additional fire protection.

Thermal insulation of rock wool
Attic insulation pieces of stone wool.

What are the disadvantages of mineral wool

Although fiber rock wool or pricked, yet their tiny pieces can be lifted in the air like dust.There is a risk of inhalation, which is not good for health.There is another danger - which is part of the material formaldehyde resin can poison us phenol, which stands out from it.But these troubles can be avoided if you follow safety precautions.

First of all, do not forget when working with mineral wool to wear a respirator.And also cover the insulation plane across the surface of a film of polyvinyl chloride vapor tight.As for the phenol, then at room temperature it stand out from the mineral wool is not.Of course, if you purchase the material a good producer.

However, when heated to a temperature above the limit of phenol still out of control.What do you do in this case?Try to avoid such a strong heat insulation.If it is possible, it takes more expensive, but absolutely safe superthin basalt fiber.Already out of it, then there is no phenol will not stand.Whatever you choose, try to buy a reliable big brand products - in this case the actual specifications of mineral wool will strictly comply with the stated.

few tips for choosing the mineral wool

list the manufacturing companies that produce mineral wool of excellent quality.This, in particular, «URSA», «ISOVER», «PAROC», «Rockwool».One of the best mineral wool is considered a native of Germany.If she met you in the shop - buy safely.After all, more than in any other country of the European Union is not so picky certification bodies.So no wonder they say that the German quality speaks for itself.

cost of mineral wool depends on its density.The higher the score, the more difficult to produce the material, and the more raw material required in its production.This is obvious - because with increasing density and the number of fibers increases.

Although slag wool and different enticingly low prices, think before you purchase them.These materials are and how proofers mediocre, and keep the heat is not very good.But the problems will not be gathered during installation - if the wool gets on your skin, the affected area after a long time will become inflamed and itchy.

Ask the Seller, in which direction are arranged fiber material.If they go vertically, mineral wool will better conserve heat and protect against noise.When the fibers are arranged randomly, the material becomes more durable, withstanding considerable dynamic loads.

Check GOST whether in this product - it is stated on the packaging.For example, mineral wool boards are made in accordance with GOST 9573-96, Mats sewed - GOST 21880-94 and LVP boards - GOST 22950-95 for.

Now about important details such as the size of mineral wool.Having come into the store to buy this material, carefully examine its characteristics, and then ask the seller to open the package.It is not necessary to hear assurances that the size of the plates really 5 centimeters, no more and no less.It is better to verify this personally.

Videos: Properties stone wool

  • Reviews of the insulation basalt wool

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