White Roof Nrdc

It has become a leed leadership in energy and environmental design standard of the u s.

White roof nrdc.

2 reflectance is measured over the entire solar. A number of periodicals and online stories have in turn reported on the studies shining a light on these much needed green building practices. Simple steps such as painting roofs with lime based white wash adding tarp like coverings or white ceramic tiles low cost high impact measures can help bring roof surface temperatures down by as much as 30 c 86 f and reduce indoor temperatures by 2 to 5 c 3 6 9 f. Here we have more heating degree days than cooling degree days which would point to the need for a darker roof.

Also we are installing more insulation at around r 24 average. White or reflective roofs have been in use for the past 15 years. New york for instance introduced rules on white roofs into its building codes as long ago as 2012. The misunderstanding is that while white roof paint can have some initial reflective value it does not eliminate heat nor does it have any waterproofing abilities.

White roofs aka cool roofs are a hot topic these days as a means to help stem global warming. March 28 2012 at 3 38 pm. Commonly referred to as cool roofing it has received a stamp of approval from the state of california which has adopted its use in its building codes. It is a complex question here in nebraska.

Over the past month several new studies analyzing the economics and environmental benefits of green roofs and cool roofs or white roofs a type of cool roof have been published in national research journals. There are many small scale initiatives in cities to make roof surfaces more reflective. In 2010 temperatures peaked at 46 8ºc more than 116ºf a 50 year. Green building council and has been mandated by government officials in chicago.

Volunteers have taken white paint to nearly 7 million square feet of tar roofs in the city though that is still only about 1 percent of the potential roof area. A green roof on the former headquarters of the gap inc. Most of us know better than to wear black on a hot day but when it comes to the roofs on our. New white roof reflects about 70 to 80 percent of sunlight i e these surfaces have an initial reflectance of 0 7 to 0 8.

It is commonly mentioned as a way to reduce the global warming effect or conserve energy. The natural resources defense council nrdc is an international nonprofit environmental organization with more than 1 3 million.