gallonsquare feet. Other websites say a gallon will cover 400-450 square feet of smooth surface. If you've got a rough textured surface or surfaces which need 2 coats of paint, a gallon will cover about 200 square feet. The above answer may be a general rule of thumb.
Highly rated roofing contractors tell us that asphalt is the most affordable roofing option, followed by wood, tile, metal, and slate. Materials for a metal roof can cost up to $350 to $1,500 per 100 square feet. Angie's List members recently reported paying an average of $12,236 for a metal roof installation.
The cost of materials for metal shingles ranges from $2.5 â $4 per sq. ft., depending on the manufacturer, and metal they are made from. These shingles typically last 40+ years.While they are not as cheap as corrugated panels, they offer great curb appeal, and superior protection against rain, snow and ice.aterial cost of an R-panel is about $1.10 per sq. ft., and a âlifetimeâ (yeah, right!) asphalt shingle will cost about $1 per sq. ft. In Midwest states, the complete system cost for both types of roofing is fairly equal.