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How Much Does A Commercial Roof Cost

Additional Roof Replacement Materials And Features

2021 Cost Of A TPO Roof | Single Ply Membrane

When you replace your roof, you may find you need to repair more than just your shingles. Here are a few things that might increase the cost of replacing your roof:

Your roofs decking is what your roofing material is installed on. Usually, decking is made of plywood or oriented strand board that is placed over your rafters. If your roof is damaged or has leaked, then your decking may need to be replaced. Replacing or repairing roof decking will cost between $2.20 and $3.00 per square foot.

However, your contractor wont be able to tell if there is damage to your decking until after your existing roofing material is removed. A decking replacement will be added to the cost of your re-roofing project after youve already received a quote.


The underlayment of your roof helps protect your roof decking against water damage. So, if your shingles crack and water gets through them, the water will hit the underlayment and wont rot your entire roofing system. Most underlayment materials used today are made with a synthetic felt that is then covered in asphalt.

In many places, underlayment is required for your home to be up to code and must be replaced as part of your roof replacement. New underlayment costs between $1.50 and $2.10 per square foot.

Ice and water barrier

Replacing ice and water barriers may cost between $1.87 and $2.53 per square foot, not including installation costs.

Fascia and soffit replacement

Roof flashing and pipe boots

Other Variables To Consider

The weather, size, and structures on flat roofs are all factors to think about when deciding on a flat roof material for replacing your old roof these are also considerations that are going to impact the overall expense of its replacement and its installation. When the buildings roof is in a hard-to-reach location, needs specific permits, is getting replaced in inclement weather, or is in a costly location the overall cost will increase.

What is the number of structures sticking out of your flat roof? The more structures that are required to be cut around and then sealed, the more expensive it will be. There could be the requirement of raising parts of the roof for suitable drainage, and/or drainage systems that are required to be installed on its sides. These upgrades are crucial to make, so you can avoid pooling water down the road, which is the primary issue flat roofs have.

One of the initial factors in the overall expense for the replacement of a flat roof is the size of the roof-top. The larger its square feet imprint means more materials and labor is going to be required. The cost per square feet decreases the larger the area is, however, size is still the maindeterminant in cost.

Average Cost Of Materials For A Metal Roof

As described above, the average cost of materials for a metal roof is around $12.00 $13.00 per square foot, but that can definitely vary based on your area, the exact type of material you choose for your metal roof, and the idiosyncrasies of your property, and other environmental factors that impact the final metal roofing quote.

Installation and labor costs also make up a major component of the cost of your new metal roof, regardless of the type of materials that you choose, so take that into consideration when you are getting started on choosing a metal roof or any kind of roof for your home.

That said, knowing the average cost of materials for a new metal roof in the United States is an important starting point!

The national average for a new metal roof is $18,500 , but of course, that varies depending on the type of roofing materials, your location, and your property.

Read Also: How Much Is A New Roof In California

Roof Replacement Cost By Roof Size Height And Pitch

The larger your roofs square footage, the more it will cost to replace your roof. Not only does a larger roof mean more raw materials are needed it means higher labor costs because of the extra time needed for the installation.

The total area of your roof is impacted not only by the size of your house but the pitch of your roof. The steeper the pitch, the larger the roof area and the more that needs to be replaced. You can use our roof pitch calculator to find the pitch of your roof.

The height and accessibility of your roof impact the price of a roof replacement. Installing a new roof on a two-story home will take longer to install than a single-story roof, as it takes more time to get materials to the roof. It also means roofers have to take additional precautions to ensure that they are completing the job safely.

Table 2: Roof replacement cost by roof size

House by square foot
2,500 $11,131.25 – $15,085.42

*replacement cost based on the average price of architectural shingles on a single-story home with a 5/12 roof pitch.

Diy Flat Roof Replacement Vs Hire A Pro

How Much Does It Cost To Replace A Flat Roof?

You should only attempt a DIY flat roof replacement if you have the time, tools and experience to get the job done right. Otherwise, leave it to the professionals since they can open up your roof without causing damage. They are also skilled in laying down the roofing materials so that they wont leak in the near future.

Just make sure to find a licensed, bonded and insured roofing contractor with a great track record of success. Get quotes from at least three flat roof contactors near you to weigh your options. Youll want to speak with their references and check out pictures of their past projects before selecting the best one.

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Factors That Impact The Price Of Flat Roof

  • Height of the Roof:

    Tall flat-roofed properties tend to be more expensive that shorter houses, because a flat roofer will need to add a chute to bring the old roofing material down to the bottom.

  • Accessibility:

    Generally, houses in Toronto are closer together than houses in Mississauga, so properties that are not as easily accessible for a dump truck to enter may require the need to remove old flat roofing material using wheelbarrows. This will tend to increase the price of your flat roofing quote. In some cases, the roofer may need to consider going from one roof to another to access the flat roof as well.

  • Existing Flat Roof Layers:

    The number of layers on the flat roof has a big impact on the cost of replacing your flat roof. A flat roof with nothing on it will be much cheaper to install new flat roof material vs a flat roof with 8 inches of the old roofing material. And the cost is ever higher in older from the 1920s -1940s where fibrous material were used on flat roofs.

  • Obstacles:

    The numbers of obstacles on the roof has an impact on the cost for replacing your flat roofs. Obstacles can include siding, vents, AC units and posts on decks. For example, if you have a house with a siding and posts all the way around, then before new flat roofing material can be installed, a roof contractor will need to take the siding off, cut the posts out or flash each posts.

Never Choose Cheap Flat Roof Replacement Services

When you hire a cheap contractor, its important to remember that quality cannot be sacrificed. Commercial flat roofs are incredibly expensive and require professional installation with experienced contractors who know how to work with this type of material.

A cheap contractor will not use the highest-quality materials or offer any guarantees on their labor which can make them difficult to replace if they do leak within the first few years.

To avoid paying more in repairs than what your new commercial roof would cost, always choose an experienced company for your flat roof replacement needs.

Recommended Reading: Cost To Reroof A House In California

Cracks And Holes In Roofing Materials

The roofing materials making up the structure of the commercial property need to be kept in reasonable condition to continue to protect the property. If there are any cracks, holes, bent tiles or sheets, they will need replacing. If there are more than a few materials that require replacing, it may be time to consider an entire commercial roof replacement.

How Much Does Commercial Roof Replacement Cost

How Much Does a Spray Foam Roof Cost?

Replacing a flat roof is a significant investment for owners of commercial buildings, but one that is unavoidably needed. There are many things to think about and factors involved in each replacement situation. These, at the end of the day, determine the overall cost of your commercial roof replacement. Read below so you can get an idea of the process and cost of getting a commercial roof replacement.

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Fasteners And Wind Loads

Depending on where your building is located, weather and local codes will impact the type of fasteners your roof system requires. In Florida, buildings must be designed to withstand up to 150-mile per hour winds. This requires stronger fasteners at more frequent intervals than some other areas might require.

General Costs Of Replacing A Flat Roof

With these variables to think about and factors listed, read on to find out what the general cost would be to replace a flat roof:

  • Removing the old flat roofing: $2-4 sq ft
  • Installation of a new flat roofing: MB and BUR: $5 average sq ft, EPDM, PVP, TPO: $7.5 average sq ft
  • General Residential Flat Roofing: $8,000+
  • General Commercial Flat Roofing: $29,000+

Taking into account the many variables that are involved, these are only typical approximate figures. The final variable is established by the contractor that you hire. Its important to hire a contractor that specializes in commercial flat roofs since sloped and flat roofing are considerably different, in addition to residential roofing versus. Commercial roofing. Getting a flat roof contractor that specializes in commercial roofing, at the end of the day, will bring the best results and costs.

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Metal Roofing Costs Vs Shingles

The costs of metal roofing versus the costs of asphalt shingles or other types of shingles are somewhat dependent on your location and the type of property that you have, along with your initial starting budget.

Also, you should keep in mind that metal roofing has a much higher resale value than some other types of roofing, so consider that when you are choosing what type of roof you want to install on your home.

If you are choosing between metal roofing and shingles, keep in mind that metal roofing can be a great choice, because it can pay for itself via energy efficiency.

A metal roof can result in decreased home cooling costs, and it also has a great resale value due to its reliability and longevity.

With a metal roof, you will most likely not have as much of a need for maintenance and repairs, and you will probably not need to replace it as quickly since metal roofing tends to be fairly low risk in regard to premature roof failures and the subsequent need for replacement.

Metal roofing also tends to have a positive resale value if you change your mind or want to replace your roof for aesthetic reasons.

The national average for metal roofing costs around $18,500, but the resale value can possibly offset some of the costs of the initial install.

The lifespan of a metal roof can last from 38 60 years.

Factors To Consider When Replacing A Flat Top Roof

How Much Does A Tile Roof Cost To Install?

The cost per square foot of replacing a commercial roof depends on a number of things. First, there is the overall cost of the material used. This cost can vary from a few dollars per square foot for tar and gravel roof material and modified bitumen all the way up to close to $12.00 per square foot for some metal or specialized membrane roofing. Another thing to consider when budgeting for roof replacement is the overall cost of the labor needed to install the new roof. While there are some viable DIY options available on the market today, most qualified professionals and inspectors recommend that you use professional roofers. Simply put, replacing a , or any roof for that matter is serious work, and making a mistake can have serious consequences. A poorly installed membrane roof, for example could lead to water and moisture infiltration, which can result in things such as mold, foundational damage, and damage to the interior of your building. And if you decide to replace your roof using modified bitumen, depending on the application process used, fire can certainly damage your building beyond repair. Another factor to consider is when the roof is to be installed. As you can imagine, weather and the amount of available daylight do play important rolls in how easily a new roof is installed.

Also Check: Cost Of New Roof California

Flat Roof Replacement Cost

Flat roof replacement costs $50 to $400 per square depending on your choice of roofing materials. Instead of sheets of metal, shingles, or tiles, layers of plastic or rubber are laid down on a flat roof and sealed by melting with the flame from a blowtorch or a compound is sprayed over the entire surface of the roof to create a weatherproof finish. Flat roofing solutions also have an impact on reducing heat loss through the roof.

  • Modified Bitumen Roof Cost Modified bitumen is an asphalt product fortified with either a polyester or fiberglass matting to add strength and increase its useable lifespan. Using Bitumen on a flat or low slope roof and costs between $150 and $400 per square.
  • PVC Roof Cost PVC as a membrane roof solution is installed in widths of 6 to 18 wide and usually laid on top of an insulation board, and sometimes requires additional edge fastening which causes a minor spike in the labor costsmaking the range of roll roofing cost go from $70 to $110 per square installed.
  • Built-Up Roof In a built-up roof, after a few layers of sheet ply are laid down, they are fused together with melted asphalt, leaving the top layer the option to be a brighter color to reflect heat instead of absorbing it. Costs range between $50 to $80 per square
  • Spray-On Roof With a spray-on roof, polyurethane solution is evenly applied for as little as $30 per square, acrylic for $60 per square, or the premium option of silicon spray averages $85 per square or more.

How Much Will A Commercial Roof Cost

A new commercial roof is not a small purchase whether you just purchased a new building or your aged roof is leaking, it is daunting to think about jumping into such a big investment. One of the most researched terms when it comes to a commercial roof is the cost.

At West Roofing Systems, we have been helping customers for decades choose the right roof solution for their building and their budget. We want everyone to feel empowered when they start getting quotes from their contractors. In this article, we break down what aspects of a roofing project will affect your cost along with some general costs you can expect.

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How Much Does Home Depot Roofing Cost Per Square

A recent quote from Home Depot for replacing a 2,000 square foot roof with a new asphalt roof was $21,481 which is $1,074 per square, or $10.74 per square foot. Another quote from Lowes for a 1,650 square foot home was $16,800, which is $1,018 per square or $10.18 per square foot. Both houses had a pitch in the region of 5/12.

How Much Do Flat Roof Repairs Cost

How much does a roof cost to replace part 1

Patching small tears and other minor flat roof repairs cost $300 to $600. Repairing storm damage, rerouting drains and other major overhauls could cost over $1,000. Remember to regularly take a close look at your roof for tears, holes and leaks. Promptly addressing these issues through DIY repair or by contacting a flat roof repair pro near you is the best way to extend the life of your roof.

Read Also: How Many Screws Per Sheet Of Metal Roofing

Condition Of Existing Roof

The condition of your existing roof will be a crucial factor in the cost of your new commercial roof. There are three options when dealing with your current roof:

  • Clean and Prepare Existing Roof $0.10 $0.75 Per Sq. Foot
  • Recovery Board Fastened on Top Of The Existing Roof $0.60 $0.80 Per Sq. Foot
  • Stripping and Removal of Roof $1.00 $2.00 Per Sq. Foot

The Cost Of The Season

As you can imagine, the weather in the south Boston area can certainly play a part in the overall cost of replacing a roof. Factors such as wind, cold temperatures, precipitation, and even excessive heat can make working with some materials more difficult, or even a bit more dangerous. This is one of the reasons why most people choose to have their roofs replaced in the summer or early spring to help mitigate the added cost of mother nature. However, doing a roofing project in the busy season for roofing companies also has a downside. Since these companies are often quite busy, the overall costs may increase simply due to the availability of the labor. In some cases, scheduling your roofing project for early autumn may be a more cost effective time overall.

When it comes to replacing the roof on your business, its notalways just about the quality of the material used. There are a number of hidden factors that cansignificantly change the cost of replacing your roof in the Boston area.

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