White Roof Membrane Reflactance

Since epdm membrane is available in both black and white era has also stayed current on the latest research specifically related to the use of reflective roofing.

White roof membrane reflactance.

A reflective roof membrane has the capability to reflect the sun s uv and infrared rays away from the building allowing the roof temperature to increase only by 12 o f which is much lower than the 78 o f increase from the traditional black roof. It has become a leed leadership in energy and environmental design standard of the u s. 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. Below are the results.

This membrane features proven technology and is fast and easy to install. What the industry knows today is very different from what it knew when white roofing was touted as a. Roofkit 10 by 100 foot white tpo reinforced membrane is 45 mil thick and is for use on flat roof surfaces. Total annual air conditioning savings were estimated to be 7 200 or 7 2 cents per square foot.

The roof was then replaced with a white reflective sarnafil roof membrane and the test was run again during the same time of year as the previous test. Converting from a dark to a highly reflective roof. The membrane can be used for new roof installation or as a replacement roof. Built up roofs consist of a base sheet fabric reinforcement layers and usually a dark protective.

With a lower temperature increase of the cooler roof is a reduced heat transferred to the insides. There s much more to selecting a roof membrane than color but it s not a black and white decision. How they can be made cool. White thermoplastic membrane roofs pvc and tpo are inherently reflective achieving some of the highest reflectance and emittance measurements of which roofing materials are capable.

Citation needed a roof made of white thermoplastic for example can reflect 80 percent or more of the sun s rays and emit at least 70 of the solar. Reformulate or coat black membranes to make them reflective. Known simply as cool roofing this process is designed to reduce the solar radiation. 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.

The environmental benefits of exposed membrane low slope roofing systems with high solar reflectance and thermal emittance have been established by the cool roof rating council crrc lawrence berkeley national laboratory and others. Green building council and has been mandated by government officials in chicago. Comparing modeled energy costs for a white highly reflective roof membrane such as gaf everguard tpo versus those for a dark absorptive membrane such as epdm the following annual savings are projected for the 125 000 sq ft. This membrane is ideal for commercial projects or diy projects such as sunrooms carports breezeways porches etc.