Green Roof Temperature Difference

Green roofs can increase a building s marketability.

Green roof temperature difference.

A roof garden is a similar technique that places container gardens on a roof. A green roof is the practice of growing vegetation directly on a roof over a waterproof membrane. Both may feature recreational facilities or commercial facilities such as a rooftop cafe. Green roofs have excellent noise attenuation especially for low frequency sounds.

At this level well prospering gr4 still showed a slight warming effect during the day with highest average value reaching 0 5 c in the morning. Both techniques may partially or completely cover a roof. At this level above the roofs there was hardly any temperature difference between green roof and white gravel t dif especially for the dry green roofs. Comparative studies show that effect of green roofs on air temperature is more significant in hot climate.

1 2 in addition green roofs can reduce building energy use by 0 7 compared to conventional roofs reducing peak electricity demand and leading to an annual savings of 0 23 per square foot of the roof. The ability of the material to reflect the sun s energy back into the atmosphere called solar reflectance and the amount of heat the material rejects instead of absorbs called thermal emittance both are measured on a scale from 0 to 1 with higher scores translating into cooler roofs. Green roof temperatures can be 30 40 f lower than those of conventional roofs and can reduce city wide ambient temperatures by up to 5 f.