New roofing will form on the surface to which it is installed. If the roof structure is uneven or has sags or rises, the shingles will not hide these areas. If these areas pose a structural problem, your Pyramid Representative can address this and present repair solutions. After the initial install, some shingles will appear raised, not sitting as flat, etc., due to the storage and shipping of the product. They will flatten out as the sun warms the roof and the product has time to lie down.