What is a vapor barrier and why is it important to use it?
In 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 is cost-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 barrier?
The 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.