Green Roofs – Are They Worth The Money?

The Truth About Green Roofs:

  1. They can help beautify the built environment

Urban greening has long been promoted as an easy and effective strategy for beautifying the built environment and increasing investment opportunity.

  1. It can prolong the life of waterproofing membranes

The life of the underlying roof waterproofing membranes can be extended by using garden roofs to shield the roof from the effects of ultraviolet radiation, temperature extremes and mechanical damage.

  1. You can grow your own vegetables

Growing your own fruit and vegetables on your living roof can be beneficial to our pockets as well as our carbon footprints: it avoids the need to go to the shop when running out of fresh fruit and vegetables which will in turn reduce the need to travel in your car.

  1. It can absorb rainwater

By capturing and temporarily storing water, green roofs can reduce excessive volumes to reduce drain overflow. By reducing peak flows, living roofs also can minimize flooding and erosion damage to buildings.

  1. It can absorb sunlight

In built up urban areas, the hard surfaces reflect the sunglight which contributes to smog and airborne particles in the atmosphere. Green roofs absorb the sunlight , therefore they play an important role in reducing urban temperatures, and subsequent improvements in air pollutions/smog.

  1. It keeps the heat inside

Green roofs can provide cost savings on heating and cooling. Results vary according to size of the building, the climate and the type of living roof. Typically a 6 inch extensive roof reduced heat gains by 95% and heat losses by 26% in comparison to a conventional roof.

  1. It reduces noise pollution

The combination of soil, plants and trapped layers of air within green roofs can act as a sound insulation barrier and reduce noise pollution with both substrate and plants making a contribution.

The substrate blocks lower sound frequencies and the vegetation blocks the higher ones. A green roof can reduce noise pollution from machinery, traffic and aeroplanes.

  1. It improves air quality

Green roofs can improve local air quality through reducing the urban heat island effect. Having a living roof can also help to remove airborne particles, heavy metals and volatile organic compounds from the local atmosphere. These contaminants are retained by the green roof itself.

  1. It Resists Fire

Since it retains water in the soil, it is significantly better at resisting fires

  1. Can Provide provisions for wildlife

Although they are not intended to be replacements for true natural areas, some green roofs can provide provisions for wildlife. They can be part of a system to complement wildlife habitats within an urban setting. In highly populated areas, green roofs could represent island habitats or, better yet, steppingstones for wildlife movement. Even in densely populated areas, green roofs can attract birds and beneficial insects such as bees and butterflies.

These are just a few of the benefits associated with green roofs, however there are many more to discover.

For more information please visit Roof infographic

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