Liu 2003 Green Roofs

An extensive green roof can reduce sound from outside by 40 decibels while an intensive green roof can reduce sound by 46 50 decibels peck et al.

Liu 2003 green roofs. Thermal performance of extensive green roofs in cold climates karen liu ph d1 bas baskaran ph d2 1 institute for research in construction national research council building m20 1200 montreal road ottawa ontario k1a 0r6 canada karen liu nrc cnrc gc ca. Green roofs can be traced back as far as the gardens of babylon and the roman empire i e. Improving coastal resiliency cities that mainly located in. Green roofs are often indicated as a valuable solution for resolving the issue of the lack of green space in urbanized areas in fact efficiently designed and integrated green roofs are valid alternatives to replace the lost green spaces and habitats in modern cities and support life behaviors within nature however based on current literature the energy related performance of green roofs.

They grew trees on top of buildings during 19th and 20th century rooftops in major cities of the united states were greened to replace the rising land costs of building parks in the inner city herman 2003 nowadays the world leader in green roof technologies is germany where more. It is estimated by liu et al. Green roofs are capable of reducing electromagnetic radiation penetration by 99 4 herman 2003. Green roofs have excellent noise attenuation especially for low frequency sounds.

Typical green roof peak flow delays range from 1 hours liu 2003 to 4 hours moran hunt et al. It was compared with an adjacent conventional roof of the same size. 2003 that dense green roof application may reduce the energy demand in the summer by over 75 percent. Green roofs offer energy savings by decreasing the demand for space conditioning.

Moran hunt et al 2005 also reported 57 to 87 reduction in runoff rates from green roofs when compared to those of conventional roofs. Greening rooftops for sustainable communities chicago. The green roof had 15 centimeters of growing medium and was planted with lawn grasses liu and baskaran 2003. Liu k baskaran b 2003 thermal performance of green roofs through field evaluation.

Misc etde 20398190 title thermal performance of green roofs through field evaluation author liu k and baskaran b abstractnote the thermal performance of a roofing system can be improved through shading insulation evapotranspiration and thermal mass by using a green roof.