GREEN ROOFS

Green Roof Systems

A green roof system is an extension of the existing roof which involves a water-proofing root
repellent system (felt, single ply), drainage system, filter cloth, a lightweight growing medium,
plants or a sedum blanket system.
Green roofs can provide a wide range of public & private benefits.

Public Benefits

Aesthetic Improvements

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

WASTE DIVERSION

Green roofs can contribute to landfill diversion by:

  • Prolonging the life of waterproofing membranes, reducing associated waste.
  • Using recycled materials in the growing medium.
  • Prolonging the service life of heating, ventilation, and HVAC systems through decreased use.

Stormwater Management

  • With green roofs, water is stored by the substrate and then taken up by the plants from where it is returned to the atmosphere through transpiration and evaporation.
  • In summer, green roofs can retain 70-90% of the precipitation that falls on them.
  • In winter, green roofs can retain between 25-40% of the precipitation that falls on them.
  • Green Roofs not only retain rainwater, but also moderate the temperature of the water and act as natural filters for any of the water that happens to run off. 
  • Green roofs reduce the amount of stormwater runoff and also delay the time at which runoff occurs, resulting in decreased stress on sewer systems at peak flow periods.

MODERATION OF URBAN HEAT ISLAND EFFECT

  • Through the daily dew and evaporation cycle, plants on vertical and horizontal surfaces are able to cool cities during hot summer months and reduce the Urban Heat Island (UHI) effect. The light absorbed by vegetation would otherwise be converted into heat energy.
  • UHI is also mitigated by the covering some of the hottest surfaces in the urban environment – black rooftops.
  • Green roofs can also help reduce the distribution of dust and particulate matter throughout the city, as well as the production of smog. This can play a role in reducing greenhouse gas emissions and adapting urban areas to a future climate with warmer summers.

Improved air quality

  • The plants on green roofs can capture airborne pollutants, atmospheric deposition, and also filter noxious gases.
  • The temperature moderating effects of green roofs can reduce demand on power plants, and potentially decrease the amount of CO2 and other polluting by-products being released into the air.

New Amenity Spaces

Green roofs help to reach the principles of smart growth and positively affect the urban environment by increasing amenity and green space and reducing community resistance to infill projects. Green roofs can serve any number of functions and uses, including:

  • Community gardens (e.g. local food production or co-ops).
  • Commercial space (e.g. display areas and restaurant terraces).
  • Recreational space (e.g. lawn bowling and children’s playgrounds)

Private Benefits

Energy Efficiency

  • The greater insulation offered by green roofs can reduce the amount of energy needed to moderate the temperature of a building, as roofs are the site of the greatest heat loss in the winter and the hottest temperatures in the summer.

INCREASED ROOFING MEMBRANE DURABILITY

  • The presence of a green roof decreases the exposure of waterproofing membranes to large temperature fluctuations, that can cause micro-tearing, and ultraviolet radiation.

Call Today: 0800 056 0203

green roof 1

Enquire about a Green Roof:

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Green Roof Systems

A green roof system is an extension of the existing roof which involves a water-proofing root
repellent system (felt, single ply), drainage system, filter cloth, a lightweight growing medium,
plants or a sedum blanket system.
Green roofs can provide a wide range of public & private benefits.

Public Benefits

Aesthetic Improvements

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

WASTE DIVERSION

Green roofs can contribute to landfill diversion by:

  • Prolonging the life of waterproofing membranes, reducing associated waste.
  • Using recycled materials in the growing medium.
  • Prolonging the service life of heating, ventilation, and HVAC systems through decreased use.

Stormwater Management

  • With green roofs, water is stored by the substrate and then taken up by the plants from where it is returned to the atmosphere through transpiration and evaporation.
  • In summer, green roofs can retain 70-90% of the precipitation that falls on them.
  • In winter, green roofs can retain between 25-40% of the precipitation that falls on them.
  • Green Roofs not only retain rainwater, but also moderate the temperature of the water and act as natural filters for any of the water that happens to run off. 
  • Green roofs reduce the amount of stormwater runoff and also delay the time at which runoff occurs, resulting in decreased stress on sewer systems at peak flow periods.

MODERATION OF URBAN HEAT ISLAND EFFECT

  • Through the daily dew and evaporation cycle, plants on vertical and horizontal surfaces are able to cool cities during hot summer months and reduce the Urban Heat Island (UHI) effect. The light absorbed by vegetation would otherwise be converted into heat energy.
  • UHI is also mitigated by the covering some of the hottest surfaces in the urban environment – black rooftops.
  • Green roofs can also help reduce the distribution of dust and particulate matter throughout the city, as well as the production of smog. This can play a role in reducing greenhouse gas emissions and adapting urban areas to a future climate with warmer summers.

Improved air quality

  • The plants on green roofs can capture airborne pollutants, atmospheric deposition, and also filter noxious gases.
  • The temperature moderating effects of green roofs can reduce demand on power plants, and potentially decrease the amount of CO2 and other polluting by-products being released into the air.

New Amenity Spaces

Green roofs help to reach the principles of smart growth and positively affect the urban environment by increasing amenity and green space and reducing community resistance to infill projects. Green roofs can serve any number of functions and uses, including:

  • Community gardens (e.g. local food production or co-ops).
  • Commercial space (e.g. display areas and restaurant terraces).
  • Recreational space (e.g. lawn bowling and children’s playgrounds)
green roof 1

Private Benefits

Energy Efficiency

  • The greater insulation offered by green roofs can reduce the amount of energy needed to moderate the temperature of a building, as roofs are the site of the greatest heat loss in the winter and the hottest temperatures in the summer.

INCREASED ROOFING MEMBRANE DURABILITY

  • The presence of a green roof decreases the exposure of waterproofing membranes to large temperature fluctuations, that can cause micro-tearing, and ultraviolet radiation.
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Enquire about a Green Roof:

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