Value Of Haivng A White Coated Roof

Some of them are also safe for pets and children.

Value of haivng a white coated roof.

Generally white in color or with white surfacing these membranes reduce the solar radiation collected by roofing surfaces which lowers the roof surface contribution to the energy used to condition air and to the local environment. Some are also water based coatings that do not have nasty strong odors on them. The infrared image on the right shows 79 c 174 f on the uncoated black section of the modified bitumen roof. But its potential value in ameliorating the most severe consequences of excess heat in cities could be life saving.

Sri measures the roof s ability to reject solar heat defined such that a standard black reflectance 0 05 emittance 0 90 is 0 and a standard white reflectance 0 80 emittance 0 90 is 100. It has a solar reflectance value of 86 a thermal emittance value of 93 and a solar reflective index of 108 overall. The per square foot cost of a premium metal roof is 9 58 with a comparable asphalt shingled roof s march 2012 per square foot cost being 3 41. The best roof coating products are also non polluting for the environment.

Contemporary metal roofing has a 50 year rated. Gaf united coatings 5 gallon silicone reflective roof coating 20 year limited warranty item 1051026. The coated white section is 26 c 79 f. Oleson found that even if every city building roof and stretch of urban pavement in the world were painted white it would only delay global warming by 11 years.

Surecoat systems white roof coating is 10 426 dry mils thick per gallon per 100 square feet 5 10 times thicker than roof paint and 2 3 times thicker than most other coatings. On a practical level white roofs in colder climates are more prone to developing condensation which leads to lower wind resistance lower insulation values and the formation of mold. The urban heat island can be a killer. Roof coatings can add 25 years to the service life of a roof and reduce the amount of discarded roofing materials that end up in landfills.

Other places like california have updated building codes to promote cool roofs which are seen as an important. The best roof coating products are also safe and non toxic.