A hologram contrasts the old heat-absorbing asphalt roof and the new reflective one of  galvanized this light metal
If you're considering a new roof, it's definitely worth looking into 
one of these... [DOC] [TLE] White Roofs Catch On as Energy Cost Cutters - The New York Times [PAR] Jul 29, 2009 ... Relying on the centuries-old principle that white objects absorb less heat ... are in 
the vanguard of a movement embracing cool roofs as one of the most ...