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Slats (profiles), aluminum and steel, come in different thicknesses and densities, depending on the method of manufacture. For example, take two thin sheets of aluminum (steel) and between paving foam, and then fasten it all special device, reminiscent of Press. Incidentally, the polyurethane foam used as heat and sound insulation. So the shutters are made in this way shall retain 30 – 40% of the heat in the room. There is another method manufacture of roller shutters. Profiles made with this technology, called extruded.

Their production process similar to cooking meat. Profile of the desired form of "creeps" from a special machine – extruder, as of meat grinder. Slats are obtained thin, but more stringent than those made by the previous method. As I have demonstrated specialists "Radian", the panel can withstand more than 50 blows with a sledgehammer. The service life of aluminum extruded roller shutters – 4 – 5 years, and steel – 2 – 3 years. And again, shutters, made of steel, is much heavier and more expensive than aluminum. After all, heavy construction, a more powerful electric motor, which of course, not cheap. In addition, the steel shutters require a perfect installation – the slightest misalignment during installation construction will entail the load on the slats.

This, in turn, affect the ease of opening and closing the shutters. So it is possible that not once have to use the services of repair and technical service. It is no coincidence, according to specialists in the last five years in Russia, mainly bought aluminum shutters, rather than steel. There are two types of automatic control over the construction of wooden window: push-button and remote. Push-button control is easier and cheaper (15 – $ 30). External buttons control switch recalls, and it is the same as the switch is mounted to the wall. By clicking, you can omit or raise blinds. If desired, click equipped with lock. In this case, simply touch the switch to design went up or down. If you choose to push-button switch in the "bezfiksatornom" performance, in order to lower or raise the blinds, it should hold up as long as the blade is not rises or falls not to the end. To stop it, simply remove your finger from the button. Remote control – the "cool" and convenient way to control the shutters. But it is also the most expensive (350 – $ 400). You probably already guessed that the shutters are served with a command console that resembles the TV remote. Just press a button – and the shutters immediately set in motion. Remote control is reasonable to apply where the set several shutters: to raise the security shutters in several rooms on different floors. Of course, if you do not forget to connect them to the control center. Automatic control, as well as wooden windows glass on request can be completed with a combined alarm system electric motor. If you have an urgent need to constantly open and close the blinds in the house, and electricity cut off very often, this system will be for you just magic wand. In this case, close or open the shutters can be manually, using Cardano, which is installed next to the box: just twist the knob, and the shutters come in motion. It is true that emergency management is a 1.5 – 2 times more expensive than electric. To lock the system, you need to spend extra and put the automatic or mechanical lock at the bottom of the canvas.

The reduction in size during the first 14 days, takes place relatively quickly, then more and more slowing down and approaching the limiting value, with special design measures. If the individual cases it is desirable to have lower levels of additional shrinkage, then the board must before use, respectively, stored for. The ratio of foam to chemical environments has expanded polystyrene high resistance to various substances, including sea water, salt solutions, anhydride, alkalis, dilute and weak acids, soaps, salts, fertilizers, bitumen, silicone oils, alcohols, adhesives, water-soluble paint. Inert with respect to the inorganic building materials – concrete, lime, cement, gypsum, sand, etc., but partially decomposed by organic solvents, resins, bitumen solutions. Relating to chemical environments and biological attack proves that the expanded polystyrene (foam) is suitable for all kinds of activities, both at the enterprise and home use (in cottages and plots). Biological properties of polystyrene Expanded polystyrene can not serve as a breeding ground for microorganisms.

He's not moldy, not rot and does not decompose. By the same author: isearch. Only in special cases, such as very dirty styrofoam, it can develop microorganisms. At the same time serves as a substrate EPS without taking absolutely no part in the biological process. Durability polystyrene expanded polystyrene slabs (essentially being plastic) resistant to aging and when used correctly maintains stable properties of the shape and size for a long time – that is, is a durable material. Today, there is evidence of field observations and expert opinion who argue that the material incorporated in the design about 30 years ago, has not undergone irreversible changes (size of plates, for example, due to shrinkage or contraction, etc.). It should be noted that the technology of production Styrofoam firms BASF, developed over 50 years ago in 1950, so age and full-scale tests is not great, as the technology itself. Isearch is open to suggestions. However, in the laboratory NIISF Moscow had conducted research on the durability and the necessary polystyrene test to analyze the characteristic cyclical changes in the outside air temperature annual cycle for the climatic conditions of Central Russia. In the climate chamber was modeled temperature-humidity effects on parts of structures, in which there is polystyrene.

A total of 80 cycles of tests of samples of expanded polystyrene plates. The following conclusions, which polystyrene boards have successfully passed the cyclic tests on temperature and humidity exposure, 80 cycles, which can be interpreted as corresponding to the number of years of use in conventional multi-frame structures with an amplitude of 40 C temperature effects. Lightness, ease of installation of expanded polystyrene boards are easily machined, using the most simple and popular tools, they can be cut into pieces of any shape and size. The economic effect Reduced cost of materials. Polystyrene plate – one of the insulating materials that is competitively priced. For example. Cost of 1 m 2 of living area where expanded polystyrene is used less than 15% -20% in comparison with other insulation materials. Reduced installation time and construction in general – boards lungs, not present difficulties in the work, do not require special equipment, do not pollute the environment. Saving of fuel will reduce emissions of CO2, which would reduce Russia's contribution to the development of the "greenhouse effect ". Reduced heating costs (up to 50%) due to low thermal conductivity as a result of ravnoplotnosti material in bulk.