Contents of
Some properties of foam
- 3.1 What you need to do to improve adhesion and interaction with
adhesive With the onset of the winter period, the heating season begins. Here comes the time to think about saving. And in order to really cost energy is less, as a rule, it is necessary to make the insulation of external or internal walls and slopes. And again the question of which material to choose, polystyrene foam or polystyrene, which is better. Warming is carried out by both, everything depends on the type of room and operational loads.
With a warmer foam or EPS polystyrene , the is hard to understand at a glance. For an accurate calculation, you can use the tables of thermal conductivity and other technical characteristics, such as density, thickness and combustibility class.
Some properties of the foam
1. The thermal conductivity is 17 times smaller than that of the brick, namely( 0,033-0,037 W / m * K)
2. Density 12-15 kg per cubic meter( grade 15), respectively grade 30 has a 25-35 kg per 1 cu.
3. The compressive strength of one slab varies from 0.04 to 0.05 MPa.
4. Absorption of moisture for one day is not more than 1%.
5. Temperature range of use, minus 50, plus 60 degrees Celsius.
6. The combustibility class of a foam plastic is often G2 \ Г1( moderately combustible, slightly combustible).
The use of such an easy and relatively inexpensive material does not constitute a particularly complex manipulation. Technical rooms, agricultural buildings, warehouses and technical buildings are suitable for such material. Warming the slabs in the attic or partitions in the dacha will not be too time consuming. A small price and simplicity in installation is an undoubted advantage of polystyrene foam. Especially the cutting of sheets( 500 \ 600 * 1000 mm, 1000 * 1000 \ 1200 mm, and other sizes), the thickness of 20,30,40,50,100 mm and more is easy to find on sale.
There are several drawbacks to this material, the toxicity of burning and mismanagement of the formation of mold on the walls, or rather the fungus. In Europe, the insulation of the walls does not make the foam plastic thicker than 3-4 mm, since the material thicker when ignited on the facade produces a lot of toxic gases. It is better to apply it to screeds for the insulation of loft and other enclosed spaces.
Failure to comply with the rules in the installation, the installation of foam from inside the damp premises can shift the "dew point" inward, with the formation of mold inevitably, there is no ventilation between the heater.
Board;when choosing materials for insulation, pay special attention to the density and the combustibility class, because the foam produces toxic gases during combustion.
Properties of expanded polystyrene
Such a sheet insulation, as well as foam, has a uniform structure. For example, the Penoplex brand, depending on the density and class, is divided into several brands: 31( 31 C), 35 and 45.
1. Durability is more than 50 years.
2. The compressive strength is 0.5 MPa. Up to 18,000 kg per 1 square.m.
3. The density of the extruded material is rather high than that of conventional granular( foam) and is 30-200 kg per cubic meter.
4. Absorption of moisture up to 0.4-0.5% per day.
5. One of the lowest values of thermal conductivity( 0,027 W / μ)
6. Temperature regime of use is -50 + 75 ° С.
7. Classes of flammability Г1, Г2, Г3, Г4, НГ( НГ - not combustible).
Areas of application of such material are diverse. Warming foundations and blind area around the house, which will prevent swelling of the ground and freezing of the base. Sound insulation of partitions and ceilings. Warming of house facades. Recently, it is often used to insulate the floor before the screed. Cutting sheets, for example, for the Penoplex brand width is 600 mm, and the length is 1200 \ 2400 mm. Thickness 30, 40, 60, 80 and 100 mm. For a qualified team it is not difficult to insulate a house or apartment in a very short time. Thus, saving you a lot of money for many years to come.
If we compare foam and extruded polystyrene foam, it turns out that there seems to be no difference between them. Yes, the basis is one, but the technology of production and the characteristics of the density are different. A is the main difference between polystyrene and extruded polystyrene foam, this is the field of application. Polystyrene can be used in the insulation of the basement of buildings. Enough foam polystyrene plate thickness of 20-30 mm for sound insulation of the partition, and foam plastic should be installed 50 mm thick.
The disadvantages of expanded polystyrene include breakage in contact with complex hydrocarbons such as siding. Destroyed by ultraviolet when applied in the open. When heated at 25 ° C in 1 m3 of material will contain 104 micrograms of styrene, this is quite a lot.
And, of course, facades with a high degree of operation require a denser material, with the reinforcement of polystyrene and polystyrene the second for mechanical effects showed the best results, of course the choice of materials depends entirely on the characteristics of the insulated surfaces and types of buildings. For a cottage, it is suitable as the best option.
How to properly perform insulation
The choice of insulation in the markets is quite large. A variety of offers from mineral wool, high density, to extruded polystyrene . What to choose? What technology of insulation, brand of glue and mesh for reinforcement to purchase? There are many questions, but the answer is one. What exactly is required to insulate? Take, for example, the facade. Installation of expanded polystyrene plates is suitable for this best.
For mineral wool, the consumption of the mixture for shelter will be 15% more than for expanded polystyrene. Since the first base layer is applied to a relatively uneven surface, and it is impossible to straighten the cotton wool with an electrical plane, unlike the styrofoam boards. The plates are expanded polystyrene extrusion and we draw our attention to you. We will decompose the whole process on the shelves.
Properties of plates, specification
- Density on compression at 10% linear deformation, not less than 0,25 MPa.
- Static bending strength 0,4-0,7 MPa.
- Absorption of water per day 0.1% of the volume.
- Fire resistance( flammability class) Г 1, В 2, Д 3, РП 1.
- Thermal conductivity at +25 Celsius Wt( m ° С) - 0,028.
- The ability to pass pairs of Mg( m h Pa) 0.018.
- Operating mode -50 + 75 ° С.
Some manufacturers of EPSAS
Manufacturers of trade marks Technonikol, URSA, Primaplex, Penoplex, IZOBOX, Polypes produce modified extrusion plates of fairly good quality. Application for heat and sound insulation of ceilings, roofs and basements suitable plates with greater strength mark SPB-C 35.45.The smaller brand of 30 has not badly recommended itself in the device of "warm floor".
The size of the manufacturers of such material in the markets is approximately the same, 600 mm by 1200 mm and longer. There are plates and other sizes from the trade mark Technonikol, CARBON ECO SP 2360 * 580 * 100 mm. With perforations and without, with and without locks. The choice is great.
What you need to do to improve adhesion and interaction with the
adhesive 1. Rub the slabs with sandpaper all over the plane, in general, scratching for improved glue adhesion.
2. Remove dust and mortar residues from the surfaces of walls and slopes.
3. Priming the surface with a deep penetration primer for facade work.
4. To measure the plumbing of the wall, uneven areas should be leveled with plaster or glue.
5. To monitor the temperature for the entire installation period, a mode less than 8 degrees Celsius is not permissible, and also above 30 is not desirable.
Having stopped the choice on polystyrene sheets with the thickness of 50 mm, it is necessary to take into account that the overlap at the corners will be more than 50 mm taking into account the thickness of the glue. Therefore, the marking should be made with a correction for the thickness of the glue and overlap. And it is better to choose a material with locks for easy installation and strength of the structure.
Adhesive
The adhesive for expanded polystyrene plates is chosen according to several basic criteria. Elasticity after drying, the presence of microfibers, the temperature regime of operation( frost resistance, heat-insulating characteristics) and high adhesion to EPS polystyrene extrusion plates.
Board;Apply glue evenly over the entire plane of the plate, and not in places in the form of small pyatka.
Installation of plates, another type of mounting
It is better to start the plates with locks on both sides of the corners, facilitate the device of the angle and measurement. It is necessary to follow and "unscrewing" the seams, the angles of the plates of the first row should not coincide with the corners of the plates of the next row. And so to the very top of the wall or the corner. And the installation of fungi or umbrellas( dowels of fastening), should correspond to the technology, namely 7 pieces. At the corners of 8-9.
When insulating the plinths, the installation of the slabs can be carried out on bitumen, the melting temperature of the expanded polystyrene allows such work to be done quickly, plus bitumen will serve as waterproofing and glue, and will not allow moisture to penetrate the base, the "dew point" will go out. In the insulation of residential, attic rooms, 100 mm of material is installed, between two vapor barrier membranes. Instead of glue, you can apply a mounting foam, an example of how to do it.
Important;getting the adhesive on the seams between the plates, is unacceptable!
After installing the plates, you can proceed to the next stage of work, reinforcing the mesh and applying a decorative layer of the facade. A design that will please you for many years.
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