Mineral wool or foam?

By Admin | Building Materials
29 May 2016

Most developers who plan to insulation of external walls of buildings "dry" method, ask yourself: What insulating material is used?

Insulation: wool or foam?

No one should be convinced that the need to insulate the exterior walls of the house.The benefits of this process, not only economic, but also aesthetic, was the reason that the wall insulation has become almost standard in carrying out repair work.

most popular method is the so-called "dry".In its favor say factors such as ease of implementation, high quality of the materials used, as well as reasonable price.In principle, one can say that the "dry" method is based on the attachment to the facade of the building thermal insulation material, as well as the appropriate implementation of the formed insulating layer.The most commonly used for this purpose polystyrene (foam) and mineral wool.Which of these materials is better?


STYROFOAM foam, polystyrene foam that is composed of balls, each containing tens of thousands of closed cells fi

lled with air.The air in each of them is movable, whereby this material has high thermal insulation performance.The total volume of air in the foam is not less than 98%.During production, polystyrene beads filled with pentane (pure hydrocarbon) having foaming properties, and heated by steam.Then pentane volatilize, unfolds, causing an increase in the volume of polystyrene beads.Cells in each bulb filled with air, and then glued together by means of steaming.

Advantages of foam, which should be listed in the insulation works, is: very good insulating performance at low temperatures, as well as when used in areas with high humidity;low density, which affects the ease of plates;watertight;long life;resistance to bacteria, molds and fungi.Used in construction foam, self-extinguishing, that is material in direct contact with the fire, it melts, but as soon as the flame is extinguished, it goes out.The foam is characterized by high diffusion resistance (low water vapor permeability).

mineral wool.

MINERAL WOOL Mineral wool is a natural product.Get it as a result of the high temperature molten steel slag with the addition of basalt rock.The technological process of mineral wool production is based on natural processes that occur during volcanic explosions.Melted basalt rock (at a temperature of over 1500 C) in the form of lava ejected from a volcano with great force, creating a fibrous clubs that before falling to the ground and create specific cooled fiber resembling wool worn.

In enterprises which produce mineral wool is used mainly basaltic rocks and limestone.The resulting product is subjected to ironing and formirovke, to get diverse products for different applications.

to perform thermal insulation of the building "dry" method is used mineral wool intended for direct facades.The most valuable advantages of wool are: incombustibility (the material can withstand temperatures up to 1000 C);very good thermal insulation;vapor permeability (very low diffusive resistance);good sound insulation;long service life;resistance to damage by chemical and biological (rodents, fungi, insects) means.Typically, the production of mineral wool is subjected to hydrophobization process, which largely prevent the water absorbency material.However, during storage or installation of mineral wool, they should be protected from water, since the water-logged state mineral wool loses its insulating properties.

mineral wool or foam?

stroked to the above advantages of both materials, it seems that the main elements that could affect the decision on the choice of one of them is the water vapor permeability and fire resistance.

terms of building physics, the water vapor permeability is of great importance in the design of building barriers, which are the external walls of the building.It should be remembered that in fact for the removal of excess moisture from the room is mainly responsible properly executed ventilation rather than so-called "breathing walls".The amount of water vapor, which extend through the outer wall of a small percentage of the total flow generated and output to the outside.Additional interior wall paint with a high diffusion resistance or vinyl wallpaper largely limits the penetration of water vapor into the walls.

From a security standpoint, mineral wool is non-combustible material, thermal insulation is recommended for wooden structures (including the frame), as well as in the construction of apartment houses and public purpose.Mineral wool insulation materials harder than polystyrene foam slabs.Given that during processing mineral wool there is a lot of dust, it is required that the construction team was dressed in special clothes, gloves and masks.

If we consider these heaters in terms of ease of installation, it is necessary to pay tribute to the foam.His virtues valued by builders, finishers are: light weight panels, ease of handling, no need to use during the work of protective equipment (gloves, masks, etc.), because the foam during processing does not create dust and does not cause allergies.

last point, which is very important when choosing an insulating material for outdoor decoration, is its cost.In this case, it is difficult to make a mistake - less foam.

When selecting the type of insulation should consider whether the benefits of the use of very good material, which is the mineral wool, its value?It is very important when there are no contraindications for the use of polystyrene foam is as good, which is an order of magnitude smaller.

daring to perform thermal insulation of external walls should also be aware of the selection of the optimum thickness of the insulating layer, as well as the proven choice of thermal insulation system, because this kind of isolation will serve for many years, so you should choose the best producer, which gives a guarantee on their product.