Roof Water Drainage Systems

Where the tube passes by the downspout from the gutter we installed a y fitting and drained the roof water from the gutter system directly into the main drainage line.

Roof water drainage systems.

The roof of a structure shall be designed for the storage of water where the storm drainage system is engineered for controlled flow. Without adequate drainage excess water can damage your roof walls foundation and landscaping. Nds solutions protect water drainage systems by managing stormwater as close to the source as possible reducing runoff and mitigating pollution and erosion. The most critical of these issues is the flat roof drainage systems.

Draining water away from your home starts with installing a sound gutter system that has extensions to carry the water away from your home. You can then surround your drain pipe with drainage rock to create a stable base. The main benefit of inner drains is that the system is hidden from view. Blockages in the under floor drain combined with high volumes of roof runoff water entering the system send the entire roof runoff into the building basement or crawl space debris flowing down the downspout drain leaves from gutters can block floor drains or even the main building sewer line leading to sewage backups into the structure.

Inner roof drains are used on flat roofs and include a low section or channel that collects water and feeds it into a concealed drain that leads to an underground drainage system. Once all the parts of the drainage system were installed we covered the tubes with several inches of rock. These drains are like the drain at the bottom of your shower except that the roof drain has a larger strainer to protect it from debris. The controlled flow roof drain system shall be an engineered system in accordance with this section and the design submittal approval inspection and testing requirements of sections 106 5 107 and 108 of the.

That line eventually emptied into the low spot in the back yard. The design of the different drainage layers allows for a portion of the stormwater to be retained above where the water is allowed to flow freely off of the roof. Adding a gentle downward slope to the ground around your home is also helpful. A catch basin will collect standing water allowing it to drain properly and a french drain pipe uses small holes to collect the water but leave soil intact.

A gravity drainage system on a flat roof differs from the gutter system you find on residential roofs in two key ways. Of course the best designed flat roof has the correct amount of pitch to drain the water off naturally. Green roof solutions offers many different drainage layer options depending on system goals regarding water retention. The most critical role of the drainage layer is to provide an adequate flow of water off the roof during and after rainfall.

Your building and location can help determine which drain will fit your roof needs.