بخاربند ?What is vapor barrier and why is it necessary to use it ?What is a vapor barrier and why is it important to use itIn general, factors such as moisture and heat tend to move upward toward the roof of a building because of their low density. This causes heat and humidity to accumulate on the roof, leading to rot and failure within a short period of time. A vapor barrier is a type of insulation used to keep the walls and roofs of buildings dry. Its primary function is to prevent damage to the roof and walls due to moisture. Vapor barriers are used in sloping roofs and are typically covered by shingles.The importance of using vapor barrier insulation in building construction is high. This product is made in a way that maintains its properties even in harsh weather conditions, completely preventing the penetration of water, rain, moisture, and snow. The breathable property of vapor barrier insulation allows evaporated moisture to pass through, preventing the occurrence of rot and mold in the building and increasing the lifespan of the body structure, roof, and building facilities.Vapor barriers can be used on any type of roof and facade, are easy to install, and do not require a flame to connect the layers. The use of non-woven layers in the technology of vapor barriers prevents the passage and movement of cold and hot air between partitions, cracks, and fractures of the roof and walls of the building. In addition, insulation iscost-effective compared with other options.The main function of the vapor barrier insulation is to prevent the penetration of moisture, water, and wind from the outside into the building. This is achieved by the presence of a breathable layer in the structure of the moisture and vapor insulation inside the building, which allows water vapor and moisture present on the roof and walls to leave the house. The breathing property of vapor barrier insulation increases the lifespan of all building components, reduces energy loss by 35%, and prevents the formation of fungi and molds in the roof and wall layers.As previously mentioned, a vapor barrier enhances the strength of the roof compared to other insulations, such as Isogam, by utilizing nonwoven layers. In addition, owing to its air circulation property, it allows for the evaporation of moisture from the roof and walls, preventing the formation of fungi and molds in the roof and wall layers. These benefits collectively contribute to increasing the lifespan of the building structure, roof, and building as a whole,highlighting the importance of using a vapor barrier.The performance of vapor barrier insulation is two-fold: it prevents the penetration of water and moisture, while also allowing for the exit of moisture and water vapor within the building. By utilizing non-woven layers, the vapor barrier also prevents the passage of hot and cold air between cracks and fractures in the building body and roof, resulting in a 35% reduction in energy loss. The upper level of this insulation serves as a sealant and air barrier, whereas the lower level facilitates the breathability of the building. Compared with other vapor barrier insulation types, it is lightweight, which is a significant advantage. Installing the vapor barrier is also straightforward, as it can be performed without the need for heat using either special nails or oil-based adhesives.?What are the reasons for the importance of using a vapor barrierThe primary function of vapor barrier insulation is to prevent the infiltration of moisture, water, and wind from the exterior into the building, owing to the breathable layer in the structure of this moisture and vapor insulation within the building, usually in the form of water vapor under the roof and building body. It allows the water vapor and moisture present on the roof and walls to exit the building in one direction. The breathability of the vapor barrier insulation increases the lifespan of all internal parts of the building, including facilities, paint, plastering, and other thermal insulations, such as rock wool, glass wool, and even items within the house. مطالعه
بخاربند vapor barrier and its uses :Introduction The deterioration and decay of roofs and walls is a significant problem that can occur in any building. Even a small failure in them can damage the entire structure. Therefore, throughout history, humanity has sought ways to prevent this from happening. Additionally, damage to a building’s roof and walls can result in energy wastage. Given the current global energy crisis, the use of vapor barrier insulation is now considered necessary to prevent energy wastage, building damage, and additional costs. As you know, moisture and heat move upwards in a building due to its lower density. Due to their specific structures, gable roofs, false Kenaf panels, and similar features are suitable locations for moisture accumulation. This is the primary cause of damage and wear to walls and roofs. The primary function of vapor barriers is to prevent moisture from damaging the building. Read on to learn more about the performance of this insulation. ?What is Vapor Barrier Insulation Simply put, vapor barrier insulation is an impermeable barrier used to prevent water vapor and moisture from entering walls, ceilings, and floor cavities. People who live in closed houses increase the humidity of the air during the day by doing daily tasks such as taking a shower and using appliances like a washing machine. High air humidity causes numerous problems, such as mold growth, rotting of building materials, and ultimately, building destruction. Vapor barrier insulators control air humidity and prevent such problems from occurring. ?What are the Characteristics and Structure of Vapor Barrier Insulation This insulation consists of at least two layers of polyester and one layer of polyethylene. The polyethylene layer acts as a breathable layer and has nano openings that, with the action of sealing and moisture, cause exhalation in the building. In fact, the polyethylene layer removes moisture collected in the building using these openings. This feature makes vapor barrier insulation unique compared to other moisture insulation, such as Izogam. The polyester layers in this insulation have antibacterial properties and protect the polyethylene layer. This insulation is usually available in the market in rolls with a length of 50 meters and a width of approximately 1.6 meters. They also come in different thicknesses and weights. But, in general, they are marketed in four main sizes, which are: G100 per M^2, mainly used for light structures, walls, and false ceilings. G120 per M^2, this grammage can also be used for light structures, walls, and false ceilings in areas with low relative humidity. G120N per M^2, this grammage can also be used for light structures, walls, and false ceilings in areas with low and medium relative humidity due to its nano properties. G140 per M^2, this grammage can also be used for light structures, walls, and false ceilings in areas with moderate relative humidity. G140N per M^2, this grammage can also be used for light structures, walls, and false ceilings in areas with high relative humidity due to its nano properties. G160NH per M^2, this grammage can be used for all regions and places. It is a product that can compete with all products produced abroad, using both hot melting and nano technology, and consists of Two layers of nano non-woven polyester + two layers of breathable polyethylene + one layer of plain non-woven polyester. ?What Areas are Vapor Barrier Insulation Suitable for If you live in a temperate climate, you definitely need vapor barrier insulation. Areas with these climate conditions have high humidity in hot seasons and require strong heating systems to warm buildings in cold seasons. This means that there is a possibility of water vapor and moisture accumulation in the building throughout the year. Cold regions also need these insulators due to the high use of heating systems. What Walls Need Vapor Barrier Insulation If a building’s walls are constructed from materials like brick, stone, plaster, fiber cement, or blocks, there is a higher likelihood of water vapor and moisture seeping through any gaps and causing damage to the structure. Therefore, it is crucial to install a protective layer on these walls. Typically, it is necessary to use insulations on all exterior walls in areas with humid climates or cold regions. In addition to external walls, applying vapor barrier insulation to attics, ceilings, and floors can prevent damage to your home. There are three categories of vapor barrier insulation, and engineers use “Sd” to refer to their permeability percentage to moisture. Sd indicates the amount of heat that passes through the insulation in a given time period and helps evaluate insulation performance. The types of insulation are: W1 level vapor barriers: This category of insulation includes materials such as rubber membrane, polyethylene sheet, and metal sheet, with a measured Sd of 0.03 or less. W2 level vapor barriers: The Sd of this type of insulation falls between 0.03 and 1. Expanded polystyrene, asphalt paper, and paper are Level II vapor barriers. مطالعه
