How much should i spend on a new roof?

The two most important variables you'll face in a job like this are the square footage of your home (and therefore your roof) and the type of roofing material you choose. How often you'll need to replace your roof and how much you spend depends on a variety of factors, ranging from the geographical location of your home to the type of shingles you select. If the existing roof was made of a lighter material, plan to spend more to add structural support to the roof before the installation shingles are heavy.