Some are naturally reflective enough to achieve cool roof standards and surface treatments can transform tiles with low solar reflectance into cool roof tiles.
White tpo roof solar reflectance.
Gaf analyzed membrane samples from roofs across the us and studied thickness over scrim surface cracking and the ability to repair aging tpo membranes.
Firestone ultraply tpo is a flexible thermoplastic polyolefin roofing membrane that is produced with polyester weft.
It is defined so that a standard black reflectance 0 05 emittance 0 90 is 0 and a standard white reflectance 0 80 emittance 0 90 is 100.
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 radiation that the roof absorbs.
Tiles can be glazed to provide waterproofing or coated to provide customized colors and surface properties.
Roofkit 10 by 100 foot white tpo reinforced membrane is 45 mil thick and is for use on flat roof surfaces.
Aged 37 recycled content post consumer 0 post industrial 5 the leed solar reflectance index sri is calculated per astm e1980.
Aged 85 tan initial 81 3 yr.
Solar reflectance index sri is calculated per astm e 1980.
The membrane can be used for new roof installation or as a replacement roof.
The roof has never been cleaned as can be seen by the dirt under the panels.
White initial 95 3 yr.
A value of 0 indicates that the material absorbs all solar energy and a value of 1 0 indicates total reflectance.
The sri is a measure of the roof s ability to reject solar heat as shown by a small temperature rise.
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.
A recent study of everguard tpo roofs installed between 8 and 16 years ago found they all performed above astm standards for newly manufactured tpo.
Solar reflectivity r solar reflectance index sri by color.
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.
Install the ultraply tpo roofing system in accordance with current firestone ultraply tpo specifications details and.
Converting from a dark to a mid reflectance roof e g.
Peak advantage guarantee information product guarantee term jm tpo 60 mil 5 10 15 or 20 years codes and approvals.
Clearly based on their reflectivity ease of maintenance and longevity white tpo membranes are the best choice for these applications.
The sr value is a number from 0 to 1 0.
How they can be made cool.
This membrane is ideal for commercial projects or diy projects such as sunrooms carports breezeways porches etc.
Initial 3 year white tan gray solar reflectance 0 79 0 69 0 61 0 55 0 34 0 34 thermal emittance.
Tile roofs can be made of clay slate or concrete.
