b'STEEP SLOPECourtesy Owens CorningOwens Cornings Duration Designer shingles in Sand Dune, the Owens Corning 2018 Shingle Color of the Year.collectivelytheSolarReflectanceIndextear-offseachyearintheU.S.,andthatasphalt roof. If you install a lot of these (SRI).AccordingtoARMA,whiletherecycling1tonofasphaltshingleisthesolarpanelsoveranalternativeroofing solarreflectancevaluesofconventionalequivalent of saving one barrel of oil. Theproduct, a non-metal roofing product, the shingles range from 0.04 for black to 0.25asphalt and aggregate from these materialsroofing product that theyre installed on will for white, the addition of asphalt granuleshas been re-used in road construction andnot last as long as the panels are warrantied madewithnewlight-reflectingpigmentsmaintenance projects across the country. for, she says. And what ends up happening can raise an asphalt roofs solar reflectiveis, homeowners have to pull solar panels off value up to 0.40. Metal: AccordingtotheMRA,metalto redo their roof, and for a lot of these roofingprojectsaregenerallymadeofpanels the warranties go void once theyre This Cool Roofing is designed to reflectrecycled material, and are 100% recyclabledismantled and have to be reassembled.solarenergybackintotheatmosphere,at the ends of their lifespans.insteadofabsorbingitintothebuildingMetal:By comparison, according to Ramey, and creating strain on its cooling systems.Best Choice for Solar metalroofings50+yearlifespanensures The association also recommends a balancedthat it will last about as long or longer than atticventilationsystemandrooforatticAsphalt: Toinstallasolarrackonanthe solar panels installed on it. Mounting insulation to lower the structures energyasphalt roof, installers will usually securea solar rack on a metal roof also does not needs. stand-off mounts to the roof trusses withrequire any roof perforationsinstallers can lagscrews.Properlyinstalled,asphaltaffixthemtostanding-seammetalroofs Metal: Metalroofingshighreflectivityroofing provides an ideal substrate for solarwith non-penetrating seam clamps.providesupto30%energysavingsoverinstallations, says Hitchcock.other roofing types, according to the MRAsFor stone-coated steel, both the MRA and material comparisons. According to Hitchcock, there are productsBoral recommend the use of a rail system currently in testing that integrate asphaltmount bracket, which also does not require Recycling shingles with solar systems, which wouldany perforations to the roof, save for one for providebothprotectionandsustainablethe solar cable. On a solar system, when Asphalt:Asphalt shingle recycling programsenergy.Asthesematerialscontinuetoyou start mounting holes through the roof havegrownoverthecourseofthepastdevelop, this will be an interesting spaceto support the legs of the solar system, every decade; as of 2017 there are active recyclingto watch, Hitchcock says. hole that you make in that panel tends to programs in 50 major U.S. markets. Thebe another danger that youve got to flash, Northeast Recycling Council estimates thatHowever, as noted by MRAs Ramey, thewhich could potentially be a problem down 50milliontonsofasphaltshinglescrapusable life of a solar panel (around 25 years)the road, says Croft.isproducedthroughmanufacturingandis generally longer than the usable life of an 16 www.mrca.orgMidwest Roofer'