Roof replacement is not something to take lightly, nor is it a repair that should be delayed. If your roof is asphalt shingles, signs may include curving or buckling of the shingles, missing or damaged shingles, or dark spots forming on the surface. Your best first step is to get it inspected by a reputable roofing company like Perry Roofing Contractors to find out if a partial or full roof replacement is required. Visit https://perryroofing.com/ to know more.