Saturday, May 25, 2024
HomeCostHow To Calculate The Cost Of A New Roof

How To Calculate The Cost Of A New Roof

Can I Replace My Roof Myself

How To Calculate Roof Area

Many do-it-yourself homeowners wonder if they can lower the cost of a replacement by doing it themselves.

It is never recommended to take on the challenge of replacing a roof unless you are a trained roofer with years of experience.

If you’re inexperienced or you’ve watched some “how-to” YouTube videos, and you start tearing off shingles, you’ll likely end up doing more damage and spending more money than you would have if you hired a professional in the first place.

There are also several safety concerns involved when it comes to working on a roof.

If you’ve never done it before, you could end up seriously injured.

When you hire a local roofing company, you’re getting professionals with the experience necessary and can back up their work with a warranty.

This will save you time, money, and stress.

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.

Cost To Replace Asphalt Shingle Roof

Replacing an asphalt roof with new shingles will cost between $5,400 and $9,000, or an average of $7,211 for a 2,000 square foot home not including old roof removal. The actual cost will vary depending on whether it is a composite asphalt shingle roof or a fiber cement composite shingle installation.

Asphalt is the least expensive solution, with a cost to remove the previous asphalt roof and install a new one coming to $7,850 for a 1,500 square foot home, while the same project undertaken and installing concrete shingles instead of asphalt will cost $24,950.

Read Also: How To Repair Rv Roof Leak

Key Factors That Impact The Cost Of A New Roof

Every roof is unique and requires a trusted, professional roofing contractor to thoroughly inspect and provide an estimate that is specific to your roofs needs.

While you might want to multiply the size of your roof by an estimated number for the cost of roofing materials and labor, this is an oversimplified calculation that leaves out many critical factors that can impact the total cost of your roofing project.

Roof Replacement Vs Repair

Roofing Calculator: How to Determine The Cost Of A New Roof

Doing a complete re-roof is a complex and expensive project. Sometimes, full replacement is not necessary, and a repair is the more appropriate course of action.

Hiring a pro to repair your roof typically costs around $500-700 for asphalt shingles, and $1,200-1,500 for metal, wood, and clay roofs. Slate repair is a lot more pricey, and can start from $2,000-3,000.

However, doing an expensive roof repair is still thousands of dollars cheaper than replacing the entire roof.

In general, replacement is warranted when your roof is nearing the end of its service life. Its actually best not to wait until the very end of the warranty period and consider replacement as a preemptive measure, before you are hit with sudden leaks and other problems.

The average lifespan of different materials varies broadly from as little as 12-17 years for asphalt shingles, to as much as 100+ years for natural slate.

Another reason why a roof may need to replaced is due to poor installation, which causes continuous leaks and other problems. Sometimes the install can be so bad that its not worth it to keep investing money in repairs.

Moreover, if your roof has sustained major damage due to ice damming, fire, hail, hurricane, or an earthquake, etc, its best to get a new roof.

PRO TIP: do a professional roof inspection every few years to determine what shape your roof is in, and fix any minor issues that are discovered. Paying for proper roof maintenance can add many years of service to your roof.

Also Check: How Many Roofing Nails Per Square

How Much Does It Cost To Replace A Roof On A 2500 Square Foot House

As an example, let’s figure out how much it could cost to replace a roof on a 2500 square foot house.

Your replacement cost depends primarily on two things: the company that installs it and the material you choose to use.

If you choose asphalt shingles, usually the most cost-effective roofing solution, the roof costs can range from $11,250 to $18,750.

That’s assuming that the cost range is from $4.50, which is about average, to $7.50 per sq. ft. for the top end.

And the prices will go up from there.

For example, here are the costs of other popular materials:

  • Slate shingles: $800 $4,000 per 100 square feet
  • Tile shingles: $500 $4,000 per 100 square feet
  • Metal roofs: $500 $1,800 per 100 square feet

After paying for materials, you have to add in other expenses roofing contractors will charge for like labor costs and the cost of materials needed for the roof installation.

How To Calculate In 3 Easy Steps

  • Start with the approximate square footage of your homes ground floor.
  • Input an estimate of the pitch of your roof.
  • Choose what material type you want.

Using your information, our roofing cost calculator will multiply your roofs approximate square footage by your chosen materials cost per square feet to create an estimate of a full replacement cost.

Note: There are other factors that affect the actual square footage of the roofing materials to be replaced, such as roof overhangs and covered porches, and other cost items that arent factored in this cost estimate calculator. Actual written proposals may vary.

Recommended Reading: How Can I Finance A New Roof

Roof Replacement Cost Calculator

A home roof replacement costs between $4,500 to $16,500 on average as of 2022. However, roof replacement costs can vary depending on the roofing material installed, home size, slope of roof, local labor prices, and other factors discussed below.

Asphalt shingles, the most common type of roofing in the U.S., would cost between $5,550 to $9,650, or $1.75 to $3.20 per square foot on average, to install on a standard 3,000 square foot roof.

Replacing Gutters And Flashing

How to Estimate The Cost of a New Roof

If installing a new roof involves replacing the gutter and flashing, you should expect to pay more for the work. Never install new roof without evaluating the gutters and flashing. Corrosion and the effects of wear and tear are renowned for damaging roofs. A rusty or cracked flashing needs replacing. A flashing that contains high amounts of sealant also require replacing, thus the need for their inclusion when calculating the cost of the new roof.

The calculations are hard to make, but this doesnt mean that you should never try it. You can calculate with the help of the roofing installer. Ask for a breakdown of the costs of installing the roof from several contractors. The information that you get would be useful in helping you calculate properly and as accurately as possible. More importantly, use this guideline to know how to calculate the cost.

Don’t Miss: How To Figure A Hip Roof

Replacing Your Roof With A Different Roof Type

There are no significant concerns when replacing your roof with another of the same kind. However, if you want to replace a lighter roof, such as asphalt shingles, with something heavier, like slate or clay tiles, you better make sure that your framing can support it. Before using a heavier material, ask a pro to inspect and strengthen your frame and trusses if necessary. That way you make sure they can support the weight of the new material. Obviously going for a different type will affect the cost of a new roof keep this in mind.


Replacing a roof is an outstanding job that can lead to all kinds of unexpected complications. Perhaps theres more damaged timber under your shingles and underlayment than you thought there was. Maybe you find that you have your roof stripped and theres no sign of your new shingles being delivered any time soon. These unforeseen problems are enough reasons for many homeowners to hire professional roofers. Given that people always expect a roof to last from 25 years to the life of the building, calling your trusted roofing agency will be well worth it.

Want to know the real cost of a new roof? At Bay 101 we help you determine it. Request a FREE ROOF INSPECTION before its too late! Our certified team of roofing experts is willing to help you. Contact us!

What Is The Cost Of A New Roof And Gutters

The total cost to get your roof and gutters replaced is $9,540 on a 1,500 square foot home. The average cost of new gutters is going to be close to $1,060 for 160 feet of gutters, or $3.60 to $28 per foot. Installing an asphalt roof on the same 1,500 square foot house with an average pitch of 6/12 will average $8,480, including the cost to remove the old roof.

You May Like: What Is The Average Cost To Replace A Tile Roof

How Much Does Roof Replacement Cost

When leaks begin it should be repaired or replaced quickly to prevent major interior water damage and mold from growing. The cost to replace the roof on most homes is $4,000 to $10,000, and most spend about $8,000. The cost can be more for larger homes, homes with complex roof designs, or when installing more expensive materials.

Many homes have an asphalt shingle roof, but some have wood, metal, tile, and slate which can be more expensive. Roofing material is estimated by the square, which is equal to 100 square feet. The average roof is 3,000 square feet, or around 30 squares.

Average Roof Replacement Cost

New Roofs &  Roof Repairs Prices

Replacing a roof is without a doubt one of the larger expenses youll face as a homeowner. Whats worse, its not a home improvement that you can directly enjoy once its finished, like, say, a new deck or a renovated kitchen. But its an investment in your property that will keep your home in good shape for years to come.

The average lifespan of a newly replaced roof is 30 to 100 years, depending on the type of roofing material that you choose. And if you need more good news, youll recoup some of the average cost to tear off and replace a roof when you go to sell your home.

Zillow estimates that a roof replacement will return somewhere around 60% of its value in a real estate transaction. Keren Jayne, a realtor with Pearson Smith, says, A new roof is marketable which pays off in other ways. The more marketable features your home has, the more potential buyers and competitive offers it will attract.

The national average cost to replace a roof is around $8,000, with most people spending in the range of $5,500 to $11,000. The two largest variables youll deal with on a job like this are the square footage of your home , and the type of roofing material you choose.

Also Check: Can You Put Solar Panels On A Tile Roof

Diy Roofing Vs Hiring A Roofer

Replacing a roof is obviously a difficult thing to do on your own, if not impossible unless you have a lot of roofing experience and related construction or home building background yourself.

And even with the right tools, some experience, and some handyman skills, you might still not be able to do the job properly, since knowing how to do roofing properly is a specialized skill and you might not want to cause problems or further damage in the case of leaks or other major repairs to the actual roof over your head.

Nevertheless to all the avid DIYers reading this, were not doubting your talents but not only is replacing a roof or building a new roof complicated, youll want to make sure that your roof replacement is covered by your insurance.

This includes the price of the new roof as well as the costs of having your roof repaired, if you are replacing a roof after major damage due to a hailstorm, tornado, hurricane, or other potentially catastrophic weather events.

Generally, if it is time to replace your roof, that means you are looking to hire a contractor or roof installer to do the job, and heres how to hire the best roof installation services for your budget.

Roof Damage From The Weather

A major storm can cause your roof to become too damaged to repair.

Tornadoes, hurricanes, major thunderstorms and hailstorms, and other natural disasters can wreak havoc on your roof even if it is relatively new, so if youve recently dealt with of these catastrophes, then you should get a roof inspection even if you dont think there is any problematic damage to your roof.

That said, while your roof may be harmed from the aforementioned weather issues, it may not need to be completely replaced, but you may need some significant roof leak repairs.

Your first thought after something as difficult as a tornado or hurricane might not be replacing your roof, but it is something to consider, especially if the storm or other weather event caused leaks in your roof that need to be repaired as soon as possible.

Read Also: How To Build A Metal Roof

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.

Whats Included In Roof Replacement

Estimating the Cost of a Roof WITHOUT a Ladder or Tape Measure When Flipping Houses

If you are planning to replace the roof on your townhouse, then expect to spend between $2,000 and $5,000 on this project.

Although that may seem like a lot of cash, it isnt that much when you consider how much work your roofing contractor will be putting in. To begin, your roof replacement process should include everything from:

  • Removing shingles
  • Applying newer flashing
  • Installing the metal drip edging

FYIif your shingles are worn, cracked, or curled, this is a major sign that you need to replace your roof. If thats the case, then your contractor might have to remove your old layered shingles. Otherwise, they may be able to put another layer of new layer shingles over the older layer.

Once you find the quality contractor that you are looking for, they will look at your roofs decking to see if it needs to be fixed. In case you didnt know, the decking is the foundation for your roof, making sure that your shingle stays in place at all times.

And then, theres underlayment. This will also need to be replaced. For the uninitiated, the underlayment makes sure that your roof is much more waterproof or water-resistant.

Now, its time for your roofer to apply newer flashing to your roof. This is typically done as a result of water damage on your:

  • Roof valleys
  • Chimney
  • Skylight perimeters

Read Also: How To Install A Roof Skylight

How Much Roofing Do I Need

The amount of roofing materials it takes to cover an incline is more than if the area was completely flat. If you have a flat roof, then the square footage of the uppermost floor of your house is the total for materials needed plus 10% more for waste. Traditional roofs that have an angle on most surfaces need to have the angled area factored into the total square footage.

Choosing A Color For Your New Roof

Selecting a color for your new roof can be almost as complicated as deciding what type of new roof you should get in the first place.

While the material that you choose for your roof replacement can affect your color decision , much of the color selection is up to you and any other decision-makers in your household.

Weve got some advice on choosing a color for your new roof that might help you decide, and your roof installation contractors might have some ideas as well.

Even just driving around your neighborhood or browsing examples of similar styles of houses online so you can see what catches your eye can help you decide on a color and material when you are installing a new roof.

Recommended Reading: What Is Composition Shingle Roof

Type Of Roofing Materials

There are different materials to choose from when installing a new roof. Some are cheap, while others are costly. The type of material you intend to use comes with a significant impact on the cost estimates of your new roof.

When working on a tight budget, an asphalt shingle roof might be your ideal choice. But if you are looking for a high-end, sharp, and durable top, you can opt for the metal roof. Notably, shingles have a 20-25-year life expectancy. Learn more about shingle costs.


Most Popular