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and convection; Conduction is a passage through which heat is transmitted through

Insulation Insulation constitutes a barrier that prevents the flow of heat, and it is considered one of the important matters. To maintain the house temperature in summer and winter; It makes the house cool in the summer, and warm in the harsh winter, and the insulation reduces energy consumption, and reduces the emission of toxic gases that cause global warming.[1] The principle of roof insulation includes three factors: radiation, conduction,
and convection; Conduction is a passage through which heat is transmitted through materials, while convection is the circulation of heat through liquids and gases; Therefore, the warm air rises to the top, and the cold air remains at the bottom so that it fills the house. As for the radiation, it works to transfer heat in a straight line to help warm anything solid that passes through it. The principle of work of the famous insulating materials is to reduce heat emission, As the insulation and heat-reflecting surfaces reduce the acquisition of heat radiation; Where the heating system is replaced by cooling in the summer, while in the winter the opposite is true.[2] How to insulate the roofs The insulation of roofs is one of the important and necessary things for buildings; This is due to the increase in the phenomenon of ceiling fires caused by light penetrating the ceiling,[1] As for how to insulate houses, there are many options and types that are determined based on the need to install insulation and the areas to be isolated in the house, and home owners may be able to install some of these types themselves Such as: blankets, and insulators that are easily poured (liquid foam), and there are other types that need technicians, professionals, and specialists in the installation of insulating materials. Insulation is considered completely one of the most widespread types of insulation; It consists of flexible fibers, glass coils, natural fibers, and plastic, where these insulating materials are found in the form of hoses. , it needs a barrier directly below it, as this barrier represents a layer that constitutes a barrier to radiant heat, then the metal roof is re-installed over this barrier without negative consequences. It is insulated with the cooling and heating system (located in the ground, and around the vertical edge of its circumference, where the value of the insulation R is not less than 1.0).[1] Some insulation materials Insulating materials consist of a group of materials that in turn insulate surfaces from heat, and these Insulation materials such as fiberglass, cellulose, wool, foam board, mineral wool insulation materials, as well as natural insulation materials made from sheep's wool, straw, and cotton.[4] Cellulose is considered to be tuberculosis. Waluz is one of the insulating materials for roofs and roofs of homes, and it is a material made from recycled paper, such as newsprint, as this insulating material contains a large proportion of recycled (recycled) materials, as it represents 82-85 percent of this material, and the principle of its manufacture lies In minimizing paper into small crumbs, and then turning it into fibers that are placed in designated places, especially in building cavities and ceilings, so as to prevent the flow of air through them. The manufacturers of this material also add borates combined with ammonium sulfate; In order to resist fire, what distinguishes this insulating material is its low cost compared to other insulating materials. As for the uses of cellulose in built and existing homes, it is placed in the cavities of ceilings and walls. [4]
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