Green Roof Vs Traditional Roof

Green roofs are covered with plants and vegetation bringing a number of excellent benefits to every building.

Green roof vs traditional roof.

Looking great energy efficient and environmentally friendly too green roofs better utilise an often neglected area. 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 issue of the italian standard uni 11235 2007 â œinstructions for the design execution control and maintenance of green roofsâ istruzioni per la progettazione lâ esecuzione il controllo e la manutenzione di coperture. Because the calculator we used compares green roofs to traditional roofs the calculator has the r value of traditional roofs built in.

We chose a value of 05 for existing dark roof solar reflectance because a typical roof is covered in black tar which has a solar reflectance value less. Green roof components in italy green roofs are not very common yet even if they are starting to spread. Increased r value a measure of the resistance of a material to heat flow of the roofing system along with reduced temperatures on the roof lessen hvac loads resulting in energy. 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.