Property response II. What effect does the drainage water across the community have on the owners?

Managing stagnant water is very important for the correct maintenance of the roof. Water accumulation means that water stays on the roof for more than 48 hours. Due to rain, snow or runoff from roof equipment, water may accumulate on roofs with low slopes. No matter what type of roof system, stagnant water will have a serious negative impact. Proper design, installation and maintenance of the roof structure can prevent this situation and its related problems.

The adverse effects of stagnant water on the roof include: deformation of bridge deck structure: stagnant water will greatly increase the load of roof panel. When water accumulates, the deflection of the bridge deck will increase, resulting in additional water accumulation, thus destroying the structural integrity of the bridge deck. Roof surface damage: the formation of ice will develop and move with the change of temperature. Is this kind of exercise ok? Scrubbing? Roof film, which may cause considerable physical damage to the film. Growth of algae and vegetation: When the water is at rest for a long time, algae and vegetation are likely to grow, which may damage the roof membrane. In addition, vegetation and other debris can block the drainage ditch, causing additional water accumulation. Dirt, debris and other pollutants accumulate in stagnant water areas: these elements will affect and damage the membrane surface. Water accumulation may lead to accelerated corrosion and deterioration of membrane surface, which may lead to roof system failure. Even if a relatively small amount of water is allowed under the roof membrane, the thermal efficiency of the insulation layer will be reduced. More importantly, the invasion of moisture will cause serious damage to the deck, insulation layer, film and the interior of the building.

Appropriate slope should be considered in the design process. The structural frame or deck of the roof should be inclined, and drainage components such as roof drainage pipes and drainage pipes should be included in the design. In addition, local piping codes may require secondary drainage to help reduce the risk of structural failure caused by blocked drainage systems. A tapered insulation system can be used. Usually, different methods of single slope, two-way slope and four-way slope are combined to obtain the necessary slope and allow drainage. Can help prevent local water accumulation, and adopt a conical insulation system.