https://housekiller.com/2016/06/24/gutter-installations-roof-repair-tips-and-outdoor-maintenance-what-you-need-to-know/

Although the cost of replacing flat roofs can be expensive in general, it can be one of the most economical roof repairs that you could make. If you are in the market for roofing, contact local companies to get the typical flat roof repair cost. They will differ so wildly based on what area of the country the area you live in. It is impossible to give an estimate for what it will cost because the roofs of the different areas of the country or the world are very different. The area you live in.

Also, ask your roofers how much the typical cost for repairs to your roof for leaks while you are at it. If your roof is leaky, they may be able to give you some guidance. There is a good chance that they can provide someone who is knowledgeable a bit about this process as well as what they can do to aid you to get an improved roofing condition.
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