Foil insulation refers to a group of new combined heat insulator and has a different name in the Depending on the material used as the base layers, mineral wool, polystyrene or foamed polyethylene. But no matter what the name of insulation foil, the material has excellent operating properties. It not only stops the outflow of heat convection, but also prevents the loss of heat radiation.
Advantages and disadvantages of foil heat insulations
Heat-insulating building materials with applied foil layer thermally during operation exhibit a number of remarkable qualities:
- Low thermal conductivity. Heaters supplemented metal foil layer, more effective than the classical thermal insulation, to reflect 97% of the thermal radiation by directing it into the room. Foil greatly enhances the quality of thermal insulation of the base layer, thus reducing the consumption of energy for heating in winter and cooling in summer.
- Resistance to sudden temperature changes and constant improvement of the level of humidity.
- Additional wind protection, noise control, hydro - and vapor barrier properties.
- Resistance to the processes of decay and swelling.
- Fire safety. Foil insulation material do not ignite when exposed to open fire and do not support combustion.
- Ease of transport and assembly work. A convenient form, small thickness, light weight materials, combined with excellent performance characteristics reveal almost unlimited possibilities for the application of reflective insulation. If necessary, they can be dismantled and reused.
- High hydrophobic properties. Shiny metal foil layer replaces the para - and waterproofing membrane, not passing moisture and vapor to the substrate heater.
- Safety from an environmental point of view, therefore, mounted both outside and inside the premises. The materials incorporating no carcinogenic, and foil layer becomes a barrier to the penetration of the smallest particles and fibers in the living space.
- Elasticity. The material has sufficient flexibility and can be mounted on irregular configuration objects.
The disadvantages are:
- Exposure to weld aluminum corrosive processes, which result eventually weaken the reflective properties of foil heaters.
- Heating the metal layer, so it is necessary a small air space between the thermal insulator and the finish coat. This gap ventilation prevents condensation on the aluminum coating than reducing aggressive corrosion.
Foil heater based on mineral wool
Unique insulation material thickness of 2 - 10 cm in the form of slabs, hollow-cylindrical and dismountable semi cylindrical sleeves, pre-compressed or sectional rolls with build-up on one of the sides foil. It is non-flammable, environmentally friendly, durable insulation, which is used to protect against heat loss designs for any purpose. Density and moisture absorption depend on the type of mineral wool and its brands. Technical characteristics of the best known thermal insulators marks based on mineral wool are given in Table 1.
Table 1
| Name | Thermal conductivity, W / m * ° C | Density, kg / mm³ | Thickness, mm | Form products |
| ISOVER Sauna | 0,41 | 11 | 50-100 | Roll (width 1.2 m, length 6.25 m or 12.5) |
| Rockwool sauna Butts | 0,036 | 40 | 50-100 | Stove 100h60 cm |
| Knauf Insulation LMF AluR | 0,04 | 36 | 20-50 | Rolls of a width of 1 m and a length of 5 or 10 m |
| PAROC | 0,04 | 32 | 50-100 | Mats 1,2h06 m and coils 5 m |
application
More rigid, resistant to high and low temperatures basalt wool with a reflective foiled layer is used to:
- insulation of structural elements closely located to the thermal radiation sources, baths, saunas and showers, for chimney, flue and chimney wall;
- insulation bearing walls or inside the room, floor, roof slabs, flat and pitched roofs of residential and industrial buildings, freezers, and others.
Glass fiber products in rolls operate:
- thermal protection of building facades, intermediate floors, roofing;
- an outer insulation engineering communications networks: the pipes for supplying cold and hot water, ventilation and air conditioning systems.
Features foil mineral wool installation
Mineral wool with a metallic layer, mount, observing the following rules:
- construct to insulate plane lattice frame of timber or metal profile with a mesh size of which will match the size of insulation plates;
- insulation boards laid in vraspor cell foil side facing the room with a small air gap is 1.5 - 2 cm to the protected surface;
- All joints are necessary to glue the reinforced adhesive tape;
- from above to fill counter-frame elements 2-3 cm thick for ventilation gap and securing cladding.
When skates roofing insulation material disposed in the space mezhstropilnoe tightly enough to eliminate the occurrence of cold bridges. The density of the reflective layer is large enough, so the heat insulator can be fixed to the rafters of stapled foil layer. The joints are sealed definitely reinforced tape.
foil polystyrene
Extruded polystyrene - is an advanced type of foam produced by extrusion. Produced products such as sheets or rolls sectional resembling the shape caterpillar tractor, with two-sided metallized coating. Extruded polystyrene foil has:
- constant reflectivity;
- absence of linear expansion;
- absolute moisture resistance,
- strength;
- resistant to temperatures ranging from -180 ° C to + 180 ° C;
- resistance to decay, the defeat of mold and mildew.
Technical characteristics of certain grades of expanded polystyrene foil are shown in Table 2.
table 2
| Name | Thermal conductivity, W / m * ° C | Density, kg / mm³ | Thickness, mm | Form products |
| PS 50125 | 0,036 | 25-38 | 30 — 50 | Plates protective polypropylene film width 1.0 m and length 5 m |
| Ruspanel Rp 50XPS | 0,04 | 30 | 10 — 100 | 1250h600 panel size mm |
| RPG Ruspanel Styrofoam Real | 0,04 | 35 | 10 — 100 | Panels with longitudinal propyl 2500h600 size mm |
Scope of use
Round polystyrene foiled layer are mainly used for thermal insulation of floors, alone or as a basis in the "warm floors" system, where a layer of reflection foil promotes thermal flux warming up and spin finish, prevents the expenditure of energy for heating the material master design. To facilitate the installation of water or electric heat carriers on most models of heaters in the production line is put convenient, highly visible marking.
Mounting
Insulation boards are laid up by the party that glitters and close to each other on the cleaned and primed surface of the deep penetration of the concrete floor and fix the seams reinforced tape. Along the perimeter of the room definitely pave demfernuyu tape, it compensates for the expansion of polystyrene foam when heated. Then, to enhance the rigidity of insulating layer over the entire area of the floor is laid reinforcing mesh, followed by attached heating pipes and operate on top tie 10 cm thick concrete or cement M200 - sandy solution.
Foamed polyethylene foil
Insulation made of polyethylene foam with a foil is one of the most efficient thermal insulation materials due to the low thermal conductivity of the base layer and the high reflectivity of aluminum coverage. It can simultaneously perform the function of sound insulation, heat insulation, vapor - and waterproofing. Produced in various forms, mats, plates, cylinders (shell) and tubes used:
- as screens of heating radiators, infrared reflective stream;
- thermal protection for floors, walls, basements, attics, floors, basements;
- for thermal insulation of pipes, ducts, car bodies, housings of industrial equipment, and many other designs.
Depending on the type of surface to mark the following notation is used insulation:
- Foil on one side - A;
- With double-sided coated foil - B;
- On one side of the adhesive, on the other foil - C;
- Metallized the one hand, raised - M;
- Top layer of aluminum foil bonded polyethylene - ALP;
- foil with an inner mesh layer - Super - NET.
The main insulation based on polyethylene foam can be called penofolAnd its analogues are foil insulating, Ekofol, Izofleks, Tepofol. With some of the technical characteristics can be found in Table 3.
TABLE 3
| name insulation | Thermal conductivity, W / m * ° C | Density, kg / mm³ | heat-reflecting ability | Operating temperature range | Permeability mg / m * h * Pa |
| penofol | 0,049 | 35 | 90% | From -60 ° C to + 100 ° C | 0,001 |
| foil insulating | 0,040 | 26-33 | 95-97% | From -80 ° C to + 80 ° C | 0,001 |
| Ekofol | 0,049 | 33 | Not less than 80% | From -60 ° C to + 90 ° C | 0,001 |
| Izofleks | 0,035 | 35 | Not less than 90% | From -60 ° C to + 80 ° C | 0,001 |
| Tepofol | 0,040 | 35 | 90% | From -80 ° C to + 80 ° C | 0,001 |
Features works on warming foamed polyethylene foil
Installation insulating cylinder made of foamed polyethylene pipes performed upon completion of their assembly. Many models of heaters for the convenience of putting on the tube have longitudinal sections, if cylinders are solid, they can be easily cut along the usual office knife. The surface of the pipe previously purified by mortar and dirt, and then mounted the sleeve of insulation. They are in the section glue glue the following brands: "NP-88", "Neoprene 2136", "QUICK -Bond" or "acrolith pin". Joints with other cylinders bonded waterproof reinforced tape.
Insulation for walls usually attached wooden bars 2 cm thick. For maximum effect, requires an air gap of 1.5 - 2 cm from both sides of the thermal isolator. When mounting is desirable to avoid overlaps plates, mounting joints required sealing tape.
Read on - insulation penofolom.
The essence of the article
Materials heat-insulated aluminum foil effective in warming due to reflectance metallized coating and the base layer structure, do not require installation costs hydra - and vapor barrier membranes. It produced several types of heaters having different types of the base layer and its technical performance, shape and release applications.
