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What Is A Rainscreen? The main function of rainscreen is..

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What Is A Rainscreen? The main function of rainscreen is to provide protection to external walls of a structure from rains as well as other climatic changes. Rainscreen is diverting the rainwater’s direction and as a result, saves the building from moisture problems. Covering one material using another is basically what meant by the process of cladding. Usually, the surface of the material that’s about to be covered is finished already and cladding provides protective coating to it. The external wall or roof of any building is sheltered by adding a layer to drive away the water from surface. Glass, masonry, metal, wood or stone are the different materials that can be used when cladding for rainscreen. Cladding can help in reducing the force to which the rain hits the surface protected while the cavity at its back is reducing thrust in rainwater over a support wall. Generally speaking, cladding has porous nature and has vents within that facilitates airflow to the cavity and as a result, prevents moisture from building up in the cavity. Apart from that, airtight supporting wall along with its covering of rigid coating of waterproof material guarantees that the moisture will not cause harm to the structure. There are 2 classifications of rainscreens as a matter of fact and these include simple and pressure equalized rainscreens.
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In the former, there are varieties for different areas that are experiencing low rainfall. Cladding of simple rainscreen is actually vented while support wall is covered with a waterproof material which is airtight. Usually, the base of wall has a drain and one common example for this kind of rainscreen is brick masonry finish above concrete wall.
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On the other hand, structures in areas that are experiencing heavy rainfalls are protected using more advanced pressure equalized rainscreen. The principle at work in this case is that, as rainstorm strikes the building, the vents in the cladding allows the air contained in cavity to bang against the layer of the air barrier of support wall. And primarily because of balancing of outer as well as inner pressure, it helps in preventing moisture to enter from the structure. This balancing of two pressures on the other hand can work better in theory than in practice. It helps a lot however in compartmentalizing the cavity. And to prevent rainwater from piercing through cladding even further, the size of joints delivers exceptional results. To get best results, it is important to get quality sealants and drainage layers as well over support walls to guarantee that the pressure balancing system is working efficiently. Rainscreen keep external walls of any building to be strong for extended period of time, making it extremely important.