High Albedo Metal Roofing

A sample.

High albedo metal roofing.

On a sunny day a roof that strongly reflects sunlight can stay much cooler than a roof that absorbs sunlight. Bare metal or metallic surfaced roofs often have a high solar reflectance typically 50 percent or higher and may have low thermal emittance anywhere between 2 percent to 66 percent depending on their surface treatment. Berridge metal products have a high recycled content and are 100 recyclable at the end of their lifespan. 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.

In the morning and in the late afternoon the high albedo materials were as cool as the air itself. How they can be made cool. I can say from practical experience that nothing beats a white metal roof reflectivity 80 90 and high emissivity 80 90. In huntington beach the albedo value of your roofing materials should be as high as possible while your emissivity value should be as low as possible.

Energy efficient metal roofing community development department 2000 main street third floor huntington beach ca 92648 planning. In los angeles the average roof albedo is about 0 17. The florida solar energy center has studied this issue. Built up roofs consist of a base sheet fabric reinforcement layers and usually a dark protective.

This is because the high albedo roof reduces the. 714 536 5271 building safety. Recycled content of berridge metal. Western metal deck an independent family owned and operated leading provider of corrugated metal roof panels metal roofing accessories metal roofing supplies metal wall panel systems and verco metal decking.

A sample cool roof. For the building types with multi zone reheat systems hospital large office medium office and primary school some net heating energy savings can be seen. As one would expect albedo roofs are formulated with special high eminence materials that keep project a high level of thermal energy back into the atmosphere. Facilities located in ontario california and route trucks servicing northern california.

You must have both high reflectivity 70 and high emissivity 75. As expected high albedo roofs save summer cooling energy but also increase the required winter heating energy. This roof has a high albedo and reflects about 63 of the energy from sunlight. Single ply membranes are pre fabricated sheets rolled onto the roof and attached with mechanical fasteners adhered with chemical adhesives or held in place with ballast gravel stones or pavers.

By preventing a majority of the heat from ever reaching the surface these roofs work to greatly reduce hvac cooling costs during the summer months. While conventional roofing materials warm up by an average 0 055 degrees c w m sup 2 sup the high albedo surfaces warm up by an average 0 015 degrees c w m sup 2 sup p. These surfaces warm to 140 to 170 degrees fahrenheit.