Financial advantages

ENERGY SAVING

Research shows that an extensive Green roof provides good Isolation during the winter. However, this depends on the humidity of the various layers. Research also demonstrates that a single storey building with a Green roof on average needs 23% less energy in comparison with the same building with a traditional Flat roof. According to the energy saving monitor of 2006, an office uses on average 1200 Megajoule per m2.

Heating represents 39% of this amount which results in 488 Megajoules per year. A green roof can save 112 Megajoules per year. 1 Megajoule equals 0.0316m2 gas. Therefore a ROOFGREEN UK green roof would save approximately 3,539m3 of gas per m2 per year.

In summer, a green roof provides good Insulation to reflect heat absorption, saving on average 4% of energy expenditure as a result of reduced artificial cooling of buildings.

LONGER ROOF LIFE

Research by various independent bodies has confirmed that waterproofing materials can last up to 3 times longer if they are protected from the elements by a green roof.
This represents a substantial saving against future replacement costs of the waterproofing and provides a significant improvement on building sustainability and whole life costs.

SURPLUS VALUES

Research on commercial values has indicated that due to growing environmental responsibility of companies and Individuals, buyers and tenants are prepared to pay more for a building that has a green roof and significantly reduces its environmental impact on the community.

RAIN WATER RETENTION

A ROOFGREEN UK green roof has a maximum rain water retention generally of 50%.
In Europe, more and more cities are prepared to reduce water and sewer tax from users who have a building with a green roof due to the reduction in the drainage systems. Another key benefit is the reduction of rain water pipes, which can often compromise the visual aspect of a buildings façade.

In general, the cost of a Green roof can be recovered within 8 - 21 years.
When considered in association with the extended longevity of the waterproofing materials a considerable saving can be achieved with the selection of a Living Green roof.