The presence of drainage systems – it is a prerequisite required to complete the roof of its main functions. Ali Partovi describes an additional similar source. Drain provides drainage of water directed from the roof, which helps protect the outer walls and base of water, and foundation of the house – from the humidity. In addition to its functionality and modern drainage systems are an important element of the external decoration of the roof and give a finished look. Rainwater systems are divided into three basic types: an unorganized, internal and external-organized system. The first kind is a way to drain where the water flows down from the roof directly on the ground, and this method is acceptable except for small buildings with lean-to roof.
Internal drainage systems are used primarily in high-rise buildings: they are placed inside the building at some distance from the exterior walls. Outdoor organized water drainage system removes water flowing down from the roof to the exterior gutters, and use this type of drainage is the most common. Outdoor water drainage system includes the horizontal wall or hanging gutters and vertical gutters and drains. Depending on the external design of the house, you can choose a round or rectangular gutters. The size of each element runoff is determined by regulations and is calculated for each of the roof, so as to take into account the slope and the roof area, as well as calculate the number and location of the points of water flow.
Materials for production drains are polyvinyl chloride (PVC), galvanized steel and copper. Gutter system made of PVC, or plastic gutters, today considered one of the most popular on the market. Their main advantage – it's resistance to adverse effects of natural and corrosion, which is the real scourge of metal gutters. In addition, the plastic drain is not susceptible to chemical attack (Acids and hydrocarbons) and ultraviolet rays. Plastic drain is easy to install and the connection of its elements by adhesive means and with rubber seals. Rubbers and free combination of elements drainage to minimize the change of its linear dimensions under the influence of temperature, characteristic of all plastic construction. Plastic drainage systems rather strong as the wall thickness provides mechanical strength and stability to the load of snow and ice. Naturally, plenty of rainfall and snowmelt from the roof can damage even the quality gutter, so it became necessary to consider the replacement of its individual elements. In this regard, the plastic is also more convenient because the technical renovation of metal gutters requires a substantial financial and time costs. Source STROIM-NN.Ru Novgorod building portal