Could you please tell me more? Will it cause a lot of trouble in the future? Will it cost me a lot of money to fix it? I'm not sure if the flat part is composition. I know from the seller that the flat roof is 3 years old. Here is the description from my inspection report: Asphalt shingles inspected from the edge with a ladder. Part of the roof is a gable/hip construction and was covered with laminated granule surface composition shingles. Roof material is fastened down with nails. This structure as viewed from the attic area indicated 2x6 rafters which spaced 24 inches on center with a major ridge of 2x8. Shingles were intact and revealed no significant granule deterioration, missing, warping, cracking, loosing or other premature deterioration. Part of roof (in bedroom area) is built-up roof, which is in good condition on the time of this inspection. In the seller's disclosure notice, the seller checked "NO" for the following statement: Is there an overlay roof covering on the property (shingles or roof covering placed over existing shingles or roof covering)?