Residential Modern Flat Roof Drainage

Our exclusive dual functional structural deck flange and combination roof drains streamline specifications saving installation time and labor.

Residential modern flat roof drainage.

For surface drainage to be successful ditches must be dug in a parallel pattern. Inner drains are resistant to freezing but can require careful maintenance to prevent problems. 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. Unlike other roofing types that are slanted or sloped to allow water to drain automatically flat roofs need a built in drainage system to help remove moisture and debris.

The engineer should lay out the roof drain system consistent with the structural design strength of the roof. A flat roof may use interior drains to collect water from the centre of the roof. Roof drains watts roof drains provide flexible solutions for specifiers and installers in any commercial roof application. Poor drainage can lead to serious issues with flat roofing from leaks to structural damage.

Each of these systems has its own pros and cons. This will keep the load down to approximately 15 lbs. Design load the water depth or build up would be limited to 3. There are three types of drain systems commonly used on flat roofs.

These ditches guide water toward the eavestroughs. Types of residential drainage systems. Surface subsurface slope downspout and gutters. Also known as low slope roofs flat roofs are less common in north american residential construction because the low slope of a flat roof has an increased tendency to collect water rather than shed like its more steeply pitched alternative.

There are roof coating products available if there isn t enough slant or slope to accomplish this. Normally for a flat roof with a 30 lb. Of course the best designed flat roof has the correct amount of pitch to drain the water off naturally. The main benefit of inner drains is that the system is hidden from view.

The one challenge with flat roofing is ensuring proper drainage. A major maintenance issue shared between all types of roof drains is debris removal. 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 angle is not significant enough to prevent water from pooling on the surface.

Although not commonly used anymore the eavestrough drainage system is a good option if you have an older large industrial or commercial flat roof. Drainage ditches are created in the roof in the lower insulated areas. This may make it less ideal for rainy or snowy climates. A gravity drainage system on a flat roof differs from the gutter system you find on residential roofs in two key ways.

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