The area of the roof: 1500 square feet

True cost of Asphalt vs Metal over the 50 years

Metal installed once	Asphalt replaced 3 times over 50yrs
$10,500	$11,250     ($3,750 x 3)
Extra spending on Gas and Hydro $25/mths
$0	$15,000      ($25 x 12mths x 50yrs)
Total
$10,500	$26,250

Metal over 50 years    = $10,500
Asphalt over 50 years = $26,250
Savings of: $15,750

It is obvious that in the long run you save thousands of dollars by choosing Lifetime Metal Roof.