Would you like to live in a Green Housing Projects - Or slightly in a Plastic Bag Maybe you living already in a plastic bag without knowing it. If you live in one of the houses completely sealed up in because of energy economy measures, you already reside in a plastic bag. So absolutely about it ? If not look at the following. The outer surface walls of a house can be looked at as your skin. Just like an organic element it dosn't protect only against weather and heat losses, also it promotes the vital gas exchange between the inside area and undeveloped outskirt area. In old green housing projects live used to be healthful, because of the inadequacy in the construction methods. This skin function is reduced by overdone sealing measures,(specially, critical of warm loss). The insulating hysterics went already so far that people have suffocated in their own sealed cell. This would not be the situation in real green housing projects. The fact that a regular ventilation is not possible over the windows often any extra is also problematic ; at least not in winter because of the energy losses; and in general in busy zones of the industrial areas and cities, because of big air pollution and noise pollution. The effect: In the interiors the used air collects and fortifies itself with pollutants. Measurements have proved that this air can be from 2 to three times more toxic than those of a city itself. Smoke, steams of cleaning products, paints, glues and further plastic products and also gases of radioactive house materials are the most dangerous to our Air. Therefore, for health reasons 2 to 3 times as much air change should take place per hour in these inhabited rooms. If they can not be ventilated regularly, overdone sealing measures have to be stopped up anyway. In modern highly insulated houses a special meaning comes up to the respiratory activity of the outer walls. It is promoted by different pressure relations, humidity relations and temperature relations between inside and exterior area. The state of floors, ceilings and walls is also Significant Their porosity adjusts the force of the gas exchange. Density materials like foil slides; bitumen paper, plastic wallpaper, coatings from plastic paints and glues, glass, insulating materials of foam plastic or mineral wool or glass wool have an effect like barriers; some of these materials are totally airtight. By the assessment of the whole building construction, according to their respiratory activity a big problematic comes: the wall joints. The join mortar with lime occupies a special place here. The porous structure of the mortar works just like a filter. The lime absorbs toxic pollutants from the air. (Lime is also used with the exhaust gas cleaning of power stations). A cellular wall promotes not only the gas exchange, in addition regenerates air. healthful walls must be dressed up to remain cellular with suitable cellular construction materials. Here are to be mentioned, first of all; coconut palm fiber mats, wood, gypsum plasterboards (from naturally gypsum), loam, straw and sawdust which are real green house materials for green house projects. In the course of the energy crisis the heat insulation has become one of the most-discussed subjects with the building of a house. Mostly separate organizations and companies translate this problematic in each situation from their own view (and frequently not quite unselfishly). For example, the sales representatives of the insulating industry, would not say something if the houses would have to be covered with a metre-thick insulating layer. Nevertheless, the data of some research institutes have proved that a reinforced heat insulation has its advantages, only to badly isolating constructions of concrete or other thin hard house materials. Properly dimensioned brick walls, with their natural qualities were up to now often underestimated. Practical attempts have proved, that an additional heat insulation can grow the energy expenses on 20-30% for a brick house with thick brick walls, because the free warm recovery is cut off by the wall from the outer surface ( relevant is hot air, solar radiotherapy, espacally in transition periods). In addition, the high expense and amount of work involved in heat insulation, is to stay critical of one of the most popular insulating materials: Mineral wool from slags or hut wool is principally radioactive, foamed plastic boards can be charged electrostatically (which the electric climate changes), in the urea formaldehyde foamed plastic contained formaldehyde can cause ocular inflammations, respiratory complaints and skin rashes. Also the contact with the stone wool and glass wool could be quite irritating to the skin or mucous membrane. It is a difficulty that to the manufacture of the most common insulating materials very high energy expenses are required. It is really hard to find construction-biologically flawless insulating materials. The market is controlled by the current insulating materials. However, beside the purely practical and material points of view, other criteria should play a role. The ideal insulating material should be a natural product, from the closer surroundings and the production should use as little energy as possible, and still have good insulating character. In green housing projects insulating materials can become necessary, for example, with weak exterior walls, floors above the earth, the uppermost ceiling and the extension of attics.
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