
- Built-Up Roof (BUR): This traditional roofing system typically costs between $5 to $10 per square foot for installation. Keep in mind that BUR roofs may require additional maintenance over time, which can add to the overall cost.
- Modified Bitumen Roof: The cost for a modified bitumen roof can range from $6 to $12 per square foot for installation. This material is known for its durability and resistance to extreme weather.
- EPDM Rubber Roof: EPDM (Ethylene Propylene Diene Monomer) roofing is often priced between $6 to $12 per square foot. It is known for its longevity and ease of maintenance.
- TPO Roof: Thermoplastic Olefin (TPO) roofing usually costs between $7 to $13 per square foot. TPO is popular due to its energy efficiency and reflective properties.
- PVC Roof: PVC (Polyvinyl Chloride) roofing can range from $8 to $15 per square foot. It offers excellent durability and resistance to chemicals and UV rays.
- Metal Roof: If you opt for a metal flat roof, prices can vary widely depending on the type of metal used (e.g., steel, aluminum, copper) and the specific design. On average, you might expect to pay between $8 to $20 or more per square foot.
- Green Roof: Green roofs, which incorporate vegetation, tend to be more expensive, typically ranging from $10 to $25 or more per square foot due to the specialized materials and installation required.
- Roof Coatings: In some cases, it might be possible to extend the life of an existing flat roof by applying a roof coating. The cost of roof coatings can vary but is generally lower than a full replacement, ranging from $2 to $5 per square foot.

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