There are a lot of factors to consider when deciding what type of roof is right for you. Here are a few factors to consider when trying to make this decision for yourself. The cost difference: There are many things that will influence the cost of a roof, outside of the material that you choose, including: the location, roof size, roof pitch, the current roof condition, and the list goes on. Keeping all of this in mind, metal roofs are generally more expensive than shingles. (