Commercial Roof Drains

It is absolutely critical to have sufficient drainage on commercial flat roofs. Bad drain locations or levels are one of the most common hazards to flat roof damage. When designing a roof, drain installation should always be considered. There are three types of commercial roof drainage system.

Inner drains

This type of drain is usually placed towards the central part or areas on the roof where water needs to be drained. These drains are then connected to pipes under the roof which will then drain the water off the building. They are perfect for large roofs. And additionally, they do not freeze during winter.


Scuppers are basically an extension of the roof membrane. The scupper is usually surrounded with metal box that functions as a flashing. It also allows water to flow through the wall. Scuppers are openings through walls that permit water to rundown the exterior of the building. Some roof designs have primary and secondary scuppers.


While some prefer to have a slightly slanted roof where water will run off, it is always better to have at least a gutter. Gutters help in removing the water away from the building including some debris, dirt and leaves. They lead the water away from the building, prevent water from spilling over windows and doorways, and most importantly it prevents flooding in certain areas.

Roof draining systems would work well if roof drain covers are used. A roof drain cover helps significantly in preventing clogging of the roof drainage system. In addition, they help protect your roof drainage structures. Some of the roof drain covers you can use include: bolt-to-bolt, cornice drain, drain dome, drain ring, boot, gravel stop, lug style, parapet sleeve, and many more. We can help to make sure to choose the right brand for you.

Here are some of our best practices:

Cleaning the roof

To avoid clogging your flat roof, we always clean it. Using tools such as vacuums to suck up pooling water of simply sweeping away debris.

Deciding on the location

Placement of your drain is important. They should more often than not be situated along the edge of the roof, but can be placed anywhere you think will be more beneficial.

Fit the drain

We make sure it is fitted correctly by using an appropriate treatment material (depending on the situation) to seal it in place.


Making sure that water does not cascade down the wall of your business this may cause damage. We use downspouts to direct water to where you want it to go. Installing enough downspouts to effectively deal with even the most torrential downpour.

If you're in need of a specialist in roofing and drainage systems call Standard Roofing today at (601) 373-5500. We can help with all your roofing needs.