What is the size of the roof and how many stories are there? Is this a simple gable roof or are there multiple peaks, dormers, and valleys? Also, do you know how many layers of shingles are there on the existing roof? If you don’t know the number of existing layers, it’s OK. Yes, the actual roof area is always greater than the floor plan square footage of the house, because there are often two-foot roof overhangs on each side of the roof, plus the roof slope to account for. Some roof can also have peaks, dormers, and valleys that can add square footage to the topology of the roof. Bottom-line, you should have some sort of an agreement in place with the contractor in case you need to install new plywood over the entire roof deck. For example, if a large portion of the roof needs to be covered with plywood sheathing, you could agree to pay say $125 or $150 per square for the new plywood sheathing installation work. You can also ask your local building board to see if the spacing between the boards of the roof deck will require installing plywood to cover the spaces. Look for a cost breakdown - Know exactly what you’ll get for the money you’re spending. Your contractor should be able to provide an itemized cost breakdown as part of your estimate and answer any questions you have. Condition of Roof - The contractor may get up on your roof to check the condition of the shingles and other parts of the roof to figure out the scope of the project. Account for labor and overhead, typically 40%–50% of the total cost. Building codes and regulations governing roof installations are complex and vary by location. Failure to comply with these codes can result in costly fines, legal issues, and potential issues when selling the property. An itemized list breaks down to the roofing material—shingles, shakes, tiles, etc—as well as the underlayment, new flashing, roof ridges and vents. You’ll also contribute to the cost of building supplies such as nails, tools, ladders and other related equipment. The primary cost factors that sway the price of roof replacement are the type of materials and the design of your roof. It’s not clear from your description whether it’s a single-story or a two-story home, but assuming it’s a single story house, it’s safe to assume that we have a roof measuring between 35 and 40 squares. In our view, anything over $7.50 per square foot for a simple over-the-top installation of basic architectural shingles from IKO, which by the way doesn’t have the best reputation, is a complete rip-off. Step flashing and any other previous flashing should only be re-used if it’s in great condition and there is no damage to the roof deck. Old drip-edge and gable flashing often gets damaged during the removal of the old roof, so it’s preferable to install brand new flashing and fully repair the roof deck, as needed, during a re-roofing job. If you beloved this article and you simply would like to obtain more info regarding supplemental resources kindly visit our web-site. Needless to say, there is usually a significant premium that comes with a certified installation and/or extended warranty coverage. Asphalt shingles have a lifespan of around 15 to 30 years. Wood shingles can last 30 to 40 years, and metal can last for as many as 70 years. But it’s important to only do so if both the roof and underlayment are in good condition. Estimating the size of your roof can be a headache if you don’t have the original blueprints. The slope and shape of your roof—hipped, gabled or flat, for example—dictate the number of shingles, shakes or tiles you’ll need. In the end, a professional will do the best job of clarifying the exact size of your roof. Flashing repair costs $200 to $500, while completely replacing the flashing costs $400 to $1,000. Consider repairing a roof instead of replacing it if less than 25% of the roof is damaged, the cost of repairs is less than 30% of the cost of a new roof, and the roof is less than 20 years old. The average residential roof size in the US is about 1,700 square feet or 17 squares, although there are many larger homes with roofs that can be well over 2,000 sq. In fact, larger residential properties with garages can easily exceed 3,000 sq. Being armed with the information above about the components that factor into the cost of roof replacement will make it easier to ask smart questions that will help with getting an accurate estimate. There are, however, other questions to ask before hiring a roofer near you. Roof replacement can be a sudden, significant, and overwhelming cost.(Image: https://mhiroofing.com.au/wp-content/uploads/2023/05/roof-repairs-old-roof-replacement-with-new-shingle.jpg) But there are some ways to save money on the costs of roof replacement to make it more manageable.(Image: https://tornadoroofing.com/wp-content/uploads/2019/03/Roof-Maintenance.jpg)