Benefits of a Green Roof Drainage System

Green roofs are a popular way to insulate and beautify your home, but there’s more to them than meets the eye. Green roofs have many benefits for building owners. A green roof drainage system is an important part of any green roof installation, and it has its own unique set of advantages over traditional systems.

Let’s take a look at some ways that a green roof drainage system can help you save money and improve the quality of your new roofing project:

A Green Roof Drainage System Is Designed to Capture and Retain Water

A green roof drainage system, such as those by Capcon Engineering, is designed to capture and retain water. It’s very similar to the way your gutters work, but on a much smaller scale. The water is collected at the highest point of the roof, then funnels down through pipes that direct it into one or more tanks.

From there, it can be drained off as needed—either by gravity or by pumping into an underground cistern if you don’t have enough room in your tank(s).

A good green roof drainage system should provide three things:

  • It needs to be able to collect all of the rainwater from your roof;
  • It has to filter out any leaves or other debris so that they don’t clog up your drainpipes
  • It needs a way for you to access this water if you ever need it (for example if there’s an emergency).

A Green Roof Drainage System Is Built to Last 50 Years, on Average

A green roof drainage system is the backbone of your green roof. The drainage mat, or “drainage layer” as it’s sometimes called, gives your plants a place to grow by providing them with water and fertilizer during the growing season.

As rainwater seeps through this layer, it filters out any debris before flowing into an underground cistern.

A well-designed green roof drainage system can last up to 50 years, on average! It’s important to remember that the lifespan of your green roof will depend on how well you maintain it.

Siphonic Drainage Will Help Prevent Flooding and Reduce Stormwater Runoff

Siphonic drainage is the best option for green roofs because it’s the most effective method to reduce stormwater runoff from your roof.

The siphon tube will help prevent flooding and ensure that your roof drains effectively. If you have a green roof, or any other type of roofing material, be sure to choose a quality drainage system so you don’t have to worry about flooding or repairs later on down the line!

Siphonic Drainage Systems Facilitate the Use of Vegetation on a Roof

  • Siphonic drainage systems facilitate the use of vegetation on a roof.
  • They’re easy to install and work with just about any type of plant.
  • The system works by allowing water to drain down from the surface of the green roof into an underground tank, which then drains into a sump pump in the basement. The pump pumps this water out of your house through a PVC pipe system, where it can be reused for irrigation or other purposes.

Low Maintenance Costs

A green roof drainage system requires very little maintenance. This means you’ll never need to clean the gutters, never have to scrub your roof, and never have to replace your gutters or downspouts.

A green roof also adds aesthetic value to your property and can add a lot of curb appeal. In fact, studies show that homes with green roofs sell for more money than comparable properties without them!

Green Roof Drainage Systems Are a Sustainable Solution for Building Owners

You may not know it, but green roofs can have a positive impact on your personal health. Green roofs:

  • Reduce the urban heat island effect.
  • Help reduce stormwater runoff.
  • Help reduce air pollution caused by cars driving on rain-soaked streets and parking lots.
  • Can help reduce water pollution in your community by reducing the amount of stormwater runoff flowing into local waterways and groundwater sources where they can upset the balance of healthy living organisms.


A green roof is a great way to make your building more sustainable. However, it’s important that the systems used are designed to last for at least 50 years. Siphonic drainage systems are one of the best ways to accomplish this goal and ensure that your green roof will serve its purpose for decades to come.