The roof of a residential building is often accompanied by the need for its insulation. Modern industry produces a large number of sheet and roll insulation materials. What insulation is better for the roof and by what parameters to choose it? The answer to these questions would like to know all the owners involved in individual housing construction or repair of their homes.
Characteristics of various types of insulation
Modern insulation are mineral and synthetic origin. Those and others have their pros and cons, which should be disassembled in detail. The most used today are the following materials for thermal insulation:
- mineral wool;
- sprayed polystyrene foam;
- foam glass;
- foam concrete;
- loose insulation.
To understand what insulation is better for the roof of the above, you need to know their characteristics.
This insulation is basalt and glass. In the first case, there is a crumb of rocks in the composition, which means adjusting the acidity of the material. This parameter strongly influences moisture resistance in direct relation. Glass wool is made of glass breakage, which makes it durable and very elastic. It is a fire resistant material that can withstand 400 – degree temperature.
The advantages of mineral wool: excellent thermal insulation quality, low weight, environmental friendliness and low cost. This material also has disadvantages: the need to build a thick layer up to 25 cm, which reduces the useful volume of the attic room, the unpleasant effect of glass dust on the skin and respiratory organs during installation. This material is produced plates, rolls and mats.
Helpful advice! For high-quality insulation of floors or roof system roof mineral wool, you need to wrap it all the rafters and lay the material between them. On top of the mineral wool make a vapor barrier film.
This material is a plate of foamed synthetic substance – polystyrene. Since in itself this substance is sufficiently flammable, then in the production of insulation, special additives are added to the composition that stop burning. Of the benefits can be noted: resistance to decay, poor thermal conductivity, very low weight. Of the minuses, experts emit only poor sound insulation and low strength, which is uncritical when weathe the roof.
If when deciding which heater is better for the roof, the choice is stopped on foam plastic, then you need to know some of the features of its installation. When warming it is necessary to put a heat-reflecting surface to the rafters. Sheets should be secured with anchors, as loose foam can make sounds from the wind. It is desirable to lay the foam in a double layer with overlapping seams and close the top with drywall.
Separately, it is necessary to note such a material as sprayed polystyrene foam. The technology of its installation is completely different. Using a special device, polystyrene mass is sprayed over the surface. Possessing fluidity, it penetrates all cracks and irregularities, filling them. Under the action of air, the mass foams and hardens. This option of insulation is the most convenient to install and has all the advantages of foam. Of the minuses there is a high price and the need to use a special installation.
This material is obtained by heating silicate glass above 1000 degrees. This temperature causes a foaming effect in it. Plates, blocks and granules of foam glass are used as an effective insulation. It can withstand temperatures ranging from -260 to 500 degrees. It is completely safe in environmental and hygienic sense material.
The positive qualities of foam glass: high strength, no tendency to shrink. It does not burn and does not freeze, does not give in to acids and alkalis. Fungi and bacteria do not settle on this material. This amount of useful properties does not have any material for thermal insulation. The technology of laying foam glass is very simple and no more difficult than that of foam plastic.
The material from which the foam blocks are made is light enough to withstand overlap, strong and durable, has recently become widely used in the construction industry. He is especially in demand in industrial construction. It has good thermal insulation properties and excellent sound insulation.
These include expanded clay, sawdust, shavings and other similar materials. Today, few people use them in construction, as they possess, in addition to positive qualities, a mass of negative ones: shavings and sawdust give rise to dampness and fungus, expanded clay is too heavy for light floors, it cannot be used in the attic roof. The main advantage of such heaters is their low price, which allows them to warm the roofs of some outbuildings, especially in the rural outback.
Helpful advice! When using heaters on the ceiling, it is necessary to put a film vapor barrier. This will prevent the leakage of ceilings in the spring when condensate is melting under the roof.
Most of the insulation is designed for all surfaces. They all cope with the task of warming perfectly if properly laid. What kind of insulation is better for the roof, the question rather taste than technical features. Therefore, most consumers choose the one that they can afford. In addition, you need to take into account the ease of installation of a single insulation on a specific type of roof. For light floors, foam plastic, polystyrene foam and mineral wool are best suited. These materials have a very low weight, which allows you to make a multi-layer coating.
Thermal insulation of floors begins with the installation of a vapor barrier film. Already it is necessary to lay several layers of insulation, depending on the climatic conditions in a particular area. All joints must be filled with foam.
Helpful advice! When weathe mansard roof most attention should be paid to the corners. They need to zeni well, as it is in them in the winter frost may appear.
Whatever material is chosen, the main thing is to lay it according to all the rules set forth by the manufacturers. Otherwise, the effect can not be seen.