![]() ![]() But what exactly is the cost of replacing a flat roof with polyurethane? On average, you can expect to pay between $4 and $6 per square foot. It’s durable, easy to install, and relatively inexpensive. Polyurethane, also known as Spray Polyurethane Foam or SPF, is one of the most popular materials for flat roofs, and it’s not hard to see why. It is also heat-sealed, which makes it more resistant to leaks and damage from the sun. This material is similar to asphalt, but it is reinforced with fiberglass or polyester matting. Modified bitumen is another option that has gained popularity in recent years, and it’s relatively affordable at $3 to $6 per square foot. Built-up tar roofs are durable and can last for 10 to 20 years, but they require regular maintenance. They are made of multiple layers of tar paper and gravel, which are held together with asphalt or coal-tar pitch. Let’s take a look at the various types of flat roofs and their associated cost:īuilt-up tar roofs are moderately priced, with an average cost of $3 – $8 per square foot. Price per Square Foot*labor and materials included There are several types of flat roofs, and the cost to replace them will vary depending on the type. Larger projects (espeically for commercial properties) can cost as much as $42,000, or sometimes even more for extremely large buildings. ![]() If the area of roof you need replaced is smaller than 1,000 square feet, your cost might fall below this typical range, but don’t expect to spend less than $2,500. How can you tell if your project will be closer to the low or high end of that range? It mainly depends on the type of flat roof you want, the cost of labor in your area, and the structure of your roof. Cost of Flat Roof Replacement by LocationĪverage Flat Roof Replacement Costs National Average CostĮxpect to spend somewhere in between $4,300 and $19,100 to replace a 1,000 square foot roof with flat roofing material.Keep in mind that this is just an average cost, and you may end up paying more or less depending on your specific circumstances. This price will vary depending on the size and type of flat roof, as well as your location. ![]()
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