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.
Otherwise, the cost of installing standing seam metal roofing generally ranges between $100 per square and $400 per square, depending on the quality of materials used, the experience of the contractor and the area where the home is located.he Costs. Average Minimum Cost: $400 per square ($4.00 per square foot). Average Maximum Cost: $650 per square ($6.50 per square foot). Because it's a premium alternative and may require specialized tools, many home improvement experts recommend having a professional install standing seam metal roofing.