Why
Have Green Roofs
Over the last 10 years building design has evolved to
cope with our increasingly unpredictable climate.
Numerous serious floods and record UK temperatures
indicate that we need to react.
We have seen changes in building technology as a result of climate change such as solar panels, water harvesting, wind turbines, green building materials yet no other green building technology offers the benefits and opportunity that a green roof does.
With many successfull completed projects Delta can guarantee that whatever drives your green-roof project, Ecofin Roofgarden can cater to your specific needs.
We have seen changes in building technology as a result of climate change such as solar panels, water harvesting, wind turbines, green building materials yet no other green building technology offers the benefits and opportunity that a green roof does.
With many successfull completed projects Delta can guarantee that whatever drives your green-roof project, Ecofin Roofgarden can cater to your specific needs.
You may need to consider that a green roof
ensures the following:
• Slow storm-water run off to assist local SUDS (sustainable
urban drainage system) planning and flood defences.
• Removes CO2 and harmful pollutants from the atmosphere.
• Regulates internal building temperatures.
• Mitigates the Urban Heat Island effect.
Heavily constructed urban developments absorb solar energy and bounce reflected heat. This increases the local ambient temperature, causing urban micro-climate peaks. Heat islands are created when impermeable surfaces absorb heat energy and radiate it back into the atmosphere. This energy calculation is called Albedo and it is measured on a scale of 0-1 (hottest to coolest).
A gravel roof is about 0.08 compared to grass 0.25. Asphalt and concrete roofs absorb the greatest heat, 0.05 and play the greatest role in the heat island effect. Green roofs such as sedum have calculations of 0.5-0.7 depending on species make up and colouration / absorption capacity.
A typical asphalt roof can reach 160 degrees F on a summer day, green roofs rarely exceed 80 degrees F.
By increasing the percentage of urban greening, this heat island process can be reduced by cooling the air through natural evaporation from green areas. This allows humidity to increase and air temperatures to decrease.
Green areas will produce Oxygen improving air quality.
Plants will reduce carbon dioxide levels and absorb large amounts of pollutants associated with cities. Plants act as urban filtration units by attracting particles of dust and pollutants to their damp surfaces.
There are two main ways to mitigate the heat island effect, more green areas and increased reflectivity. A city covered in mirrors or a city covered in plants !
• Slow storm-water run off to assist local SUDS (sustainable
urban drainage system) planning and flood defences.
• Removes CO2 and harmful pollutants from the atmosphere.
• Regulates internal building temperatures.
• Mitigates the Urban Heat Island effect.
Heavily constructed urban developments absorb solar energy and bounce reflected heat. This increases the local ambient temperature, causing urban micro-climate peaks. Heat islands are created when impermeable surfaces absorb heat energy and radiate it back into the atmosphere. This energy calculation is called Albedo and it is measured on a scale of 0-1 (hottest to coolest).
A gravel roof is about 0.08 compared to grass 0.25. Asphalt and concrete roofs absorb the greatest heat, 0.05 and play the greatest role in the heat island effect. Green roofs such as sedum have calculations of 0.5-0.7 depending on species make up and colouration / absorption capacity.
A typical asphalt roof can reach 160 degrees F on a summer day, green roofs rarely exceed 80 degrees F.
By increasing the percentage of urban greening, this heat island process can be reduced by cooling the air through natural evaporation from green areas. This allows humidity to increase and air temperatures to decrease.
Green areas will produce Oxygen improving air quality.
Plants will reduce carbon dioxide levels and absorb large amounts of pollutants associated with cities. Plants act as urban filtration units by attracting particles of dust and pollutants to their damp surfaces.
There are two main ways to mitigate the heat island effect, more green areas and increased reflectivity. A city covered in mirrors or a city covered in plants !
Unit 14, M1 Commerce Park, Markham Lane, Chesterfield S44 5HS Tel: 01246 826600 Fax: 01246 826611 email: gemma@deltasp.co.uk
