Run On Flat Roof

Flat roof examples see membrane single ply roofs.

Run on flat roof.

With the proper roof slope and drainage installation precipitation is not a problem for buildings with flat roofs. Using a lean to flat roof allows water to run easily away from the building into new gutters which can be connected to existing drainage systems or even new soakaways. The industrial age brought about economical building methods and the prevalence of flat roof construction. While a flat roof appears to be level a minimum slope is required to allow water to drain off.

Occasionally a new flat roof will be required to replace an old roof. Water does not run off of it very easily. It s affordable and easy to build. They would be more accurately called low slope roofs.

It is a simple and cost effective method to use for certain commercial construction buildings like warehouses. Getting water off a flat roof sounds like a tricky scenario. To avoid ponding and leaks flat roofs typically have a nominal drainage slope of 2 to 4. So most flat roofs have at least a little slope either towards one or more roof edges or towards roof drains.

However flat roofs are not really flat. A correctly build flat roof will drain the rainwater quickly and effectively into the gutters without allowing water to collect in depressions and pond on the surface of the roof leading to the build up of silt deposits on the roof and stresses in the membrane when the water freezes a small amount of ponding is inevitable and it should not reduce the. There s a problem with flat roofs.