Flat Roof Drainage System Design

Flat roof design guide some bauder waterproofing systems are bba approved for use with zero falls but back falls are not acceptable and should be corrected.

Flat roof drainage system design.

This data is available in excruciating detail for most countries in weather map form and as you ll read. Flat roof drains scuppers gutters and drainage systems on flat roofs one of the most overlooked items on a flat roof is the draining system. More attention should be given to the location of a drainage system to avoid future problems. Screw a drain cover over the end of the tubing as it approaches daylight to keep critters out.

If it hasn t that s a sign of a problem with roof drain parts or the drainage system. This manual provides comprehensive guidance on how roof drainage systems for buildings should be designed using information given in european standard 12056 3 2000 gravity drainage systems inside buildings part 3. The maximum rainfall rate anticipated in the area where the building is located the flow in liters per minute per square meter for some x number of minutes. Roof drainage layout and calculation.

I examined several roof drainage calculators and tables to see what they tell us. Your building and location can help determine which drain will fit your roof needs. To design a sloped or flat roof drainage system we need to know the anticipated maximum rainfall rate and the flat or projected roof area. To help see where any water might be collecting clean any debris from the flat roof surface including sweeping or gathering fallen leaves or branches and clearing any loose debris or gravel that may block drainage holes.

The manual is intended to be used in conjunction with. Please see roof drainage calculations for a detailed answer to your question. Of course the best designed flat roof has the correct amount of pitch to drain the water off naturally. 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.

To prevent erosion make a rock bed around the end of the tube. To design a sloped or flat roof drainage system we need to know several things.