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How To Estimate A New Roof

What About The Waste Factor Should I Order Extra Roofing Materials

Flat Roof estimate and how we price a new flat roof.

You want to order extra material to account for waste. Waste factors vary.

10%-15% is a good rule of thumb, but your results may be different. More complicated roofs will have a higher waste factor because there are usually more cut shingles around corners, walls, and edges.

It is okay to have a few shingles left over. They can be saved in case there is roof damage later or if repairs need to be done in the future.

So for the 24 square roof example, you would want to add 2.4 squares which equal about 7 or 8 more bundles.

Other Roofing / Building Calculators

  • Roof Shingles Calculator – estimates roof area, materials and installation costs of Asphalt Shingles, for Gable and Hip roofs.
  • Flat Roof Calculator – estimates replacement costs of low-slope roofs, single ply membranes and built-up roofs , as well as insulation, parapets, penetrations and drains.
  • Roof Rafters Calculator – provides material list & prices of lumber for roof rafters / trusses.
  • Roof Pitch Calculator – gives you accurate roof slope, based on roof run and rise. Also converts roof pitch to degrees.
  • Seamless Gutters Calculator – helps you quickly price out aluminum seamless gutters – includes materials and installation. Note, that rain gutters are an essential part of house waterproofing. They prevent water from getting behind the siding, damaging house walls, insulation and foundation, as well as protect your landscaping.
  • Metric Roof Calculator – should be used if you live in Europe, UK, AU, NZ or other country that does not use the Imperial measurements system.

Final Word of Advice for homeowners who want to get the lowest possible price: It’s too expensive to buy cheap roofs, as it will cost you double to redo it after it starts leaking within a year. This is from my vast experience.

Average Roof Replacement Cost in US:

Low End

How Many Bundles Of Shingles Will You Need

The average bundle of shingles covers 33.3 ft2, so three bundles of shingles are needed per square. Asphalt shingles range in price from about $25 per bundle for a standard 3-tab style to around $50-$75 or more for an upgraded architectural style.

Since transportation is a major cost factor, expect prices to vary by location. A typical bundle of shingles weighs about 75 pounds, while some premium products can weigh over 100 pounds per bundle, so consider delivery of materials.

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Finding The Total Roof Area

Once the area of the roofs footprint is known, the overall roof area can be found by accounting for the roofs pitch. The pitch of the roof is the rise over a 12-inch run. Use our roof pitch calculator to find the pitch of your roof.

Next, multiply the footprint of the roof by the multiplier below for your roof pitch to find the overall roof area.For example, a 4/12 pitch roof that is 100 square feet:

100 × 1.054 = 105.4ft2

Roof Pitch Area Multipliers

Multipliers for common roof pitches that can be used to find the total area of a roof.


Roof Replacement Or Repair

Roofing Estimate

When leaks occur the first question to ask is whether the roof can be repaired or if it should be replaced. If the roof is relatively new and the leaks are simple to repair then a repair may be in order.

If its over 20 years old and the leaks are widespread then a full replacement may be necessary. Most will be somewhere in between however and the decision may require an expert. Consult a roofer to get an inspection and identify your options.

Get Free Project Estimates

Find Qualified Roofing Professionals in Your Area

If you are replacing your roof consider getting quotes from multiple contractors and ask for references from recent customers. Ensure the contractors are licensed and insured, and check for online reviews of there work. Find local roofing installers and get free estimates for your project. Learn the warning signs that your roof needs to be replaced if youre unsure.

Recommended Reading: How To Repair Epdm Roofing

Select A Local Company With A Solid Reputation

While there are a number of factors that determine the average price of a new roof, what ultimately determines the value of the work you receive, is the company you select to do the job.

Choosing a local company with a good, long standing reputation in the community will ensure that your new roof will be installed properly and will perform and last as its intended to for your home and your region. Weve been installing high quality roofing materials in this area for decades, and our experience and attention to detail has made us an industry leader. Contact Armorvue Home Exteriors to schedule a virtual appointment to discuss a new roof for your home. Wed love to share information about our high quality materials and answer any questions you have about replacing your roof.

We have saved 25% on our energy bill per month since installing windows, which blew my mind.

How Much Does It Cost To Install A Green Roof

A green roof is where either all useable space on a roof or a portion of the useable roof is covered in live vegetation. According to the Renewable Energy hub website, a green roof will typically cost between $25 and $41 per square foot. Green roof installation costs per square foot decrease as size increases.

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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.

What Is My Ballpark Cost

How to Estimate The Cost of a New Roof

A typical one-story asphalt roof costs around $7,000, with premium materials you could be doubling that. However, cheaper pricing doesnt always mean a bargain.

Choose the best roofers around Charlotte with Southern Star Roofing today.

Also Check: What Is An Asphalt Shingle Roof

Does The Type Of Roof Affect The Cost

In short, one of the factors that will influence the cost of your new roof the most is the type of roof you have. The larger the roof, the more it will cost. The same is true for roofs with more extravagant designs or unusual pitches.

Flat roofs are generally the cheapest, not only due to their simple design but also the fact that flat roofing materials are far more cost-effective. However, pitched roofs can still prove reasonable. Gable and dormer roofs, the most common types of pitched roof in the UK, generally use basic designs that wont add too much to the cost. This is largely because non-standard roof designs will require more custom-made components such as trusses, rafters and battens which will also be more time-consuming and difficult to install.

Whilst size is perhaps the greatest determining factor in the cost of a new roof, complexity is certainly another. Highly complicated roof designs such as those with multiple hip and valley sections will almost certainly cost more, due to how challenging they will be to cover effectively. This will drive up the cost of roofing materials and labour, no matter how large or small your property is.

Cost To Install Plywood Sheathing Or Replace Roof Decking

The average cost to replace roof decking in a 2,400 square foot home is between $1,050 and $1,575. It will take approximately 75 sheets of plywood sheathing at an average cost of $14 to $21 per sheet. A smaller 1,100 square foot home will only need around 34 sheets for an average price of $600. For roof sheathing, plywood typically comes in sheets of 4 by 8 that measure either 11/32 or 3/8 thick.

Cost to Replace Roof Decking

Home Size
$1,122 $2,414

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What Is The Best Type Of Roofing Material For Cold Climates

If you live in a cold climate with punishing winters full of snow, ice and high winds, your roof will undoubtedly take quite a beating. The ideal roof for this type of environment is a slate tile roof. Made of stone, this type of roof can easily stand up to harsh winters, and can last up to 100 years.

A slightly less expensive option is a metal roof, which, when installed properly, allows snow and ice to slide off rather than adhering to your homes roof. Metal roofs are also great at bringing extra heat from the sun into your home, which can help lower heating bills during the cold months.

Style And Health Of Your Roof

Roofing Estimate

The potential price of your roofing project will also be based on factors like the style of your roof and its current condition.Your roofer will need to know whether your roof is flat or sloped, hipped or gabled, the number of levels it has, and if there are dormers or valleys. The roofs accessories and underlying structure may also be a factor, especially if you see any signs of moisture damage in your attic.Mold remediation and/or replacing rotten framework will definitely change the scope of your project.

Read Also: Does Replacing A Roof Increase Home Value

Ask About Finance Options

Fortunately, roof financing options make it easy to get the roof you need without emptying your wallet. Look for loans with low monthly payments, no prepayment penalty, and deferred payments. Ask your independent roofing contractor about finance solutions when requesting your estimate.

Find a trusted, independent roofing contractor in the Owens Corning Roofing Contractor Network near you. Ask these questions before making your final decision on who to hire.

Roof Tile Replacement Cost

Roof tile replacement costs between $1,400 and $1,600 per square on average for concrete tile, Spanish tile, and clay tile. Tile roofing tends to weight a lot and will cost $1,000 more if your entire roof framing needs an upgrade to support the extra weight.

Clay Tile Roof Cost

Clay roof tiles are right up there with entry-level copper in regards to price, which averages around $1,500 per square. The average cost to install a new clay tile roof costs between $15,000 and $45,000 depending on your roof size.

Concrete Roof Tile Prices

Like clay tiles, concrete tiles also carry a $1,500 per square price, with the average installation costing $22,500 to $30,000. Depending on the current structural integrity of the roof framing, it is possible some repair or strengthening work will need to be done on the rafters to support the extra weight of these heavier products.

Spanish Tile Roof Cost

Spanish roof tiles generally have a little more design to them than entry-level clay or concrete, and you can expect to pay in the region of $1,500 to $1,600 per square for the install, and around $1,000 first if your entire roof framing needs work to support the added weight.

Read Also: How Much Does It Cost To Pitch A Roof

How To Estimate The Cost Of A New Roof

When homeowners are looking into a new roof, the most important piece of information they want to research is how much it will cost. When it comes to installing a new roof, there are many factors that go into determining the cost, making a simple formula nearly impossible. You may not find a formula online, but you can look at the different factors that go into a new roof installation to get an idea of where your home may fall in the range of replacement costs.

How Much Does A Roof Replacement Cost

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

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.

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Asphalt Roof Shingle Prices

Different roofing materials have their own advantages and disadvantages. While one may choose a certain material for aesthetic reasons, another will select ones based on functionality. Below are the prices for the popular types of asphalt shingles used in Ontario. Prices for each grade ranges per square foot and is determined based on the factors listed above.

For traditional steep sloped roofs:

Asphalt Roof Shingles
Luxury Architectural $5.50 $6.50

Installing a new roof is a big investment. However, if you choose a good roofing contractor, your new investment will last up to 50 years. Before you replace your roof, it is necessary to determine if a new roof is required. Is your existing roof near the end of its service life ? Are there multiple & extensive leaks? Do you want to improve your home curb appeal? If you answered yes to either of these questions, it is most likely time to have your roof inspected by a good, professional roofing company. A professional roofer will be happy to explain all aspects of a roofing system and the price associated. Note that estimates vary between roofing contractors.

Smart Roofing has been installing quality roofs for both commercial and residential clients since 1995. Contact us for a free estimate and one of our experienced roofing consultants will walk you through every detail of the project.

The Quality Of The Labor Team

Like anything in life, you get what you pay for. There are less expensive and more expensive options for just about any product and service available, and what you choose could have a dramatic effect on the cost.

In roofing, there are less expensive companies that dont have the same reputation as those that have been in the business for quite some time. While you can certainly opt for the cheapest company, you may end up spending more in the long run because of the workmanship you get in return.

Less expensive companies may claim to be able to do the job well in a short amount of time, but they may not have the expertise, know-how and experience needed to get the job done right.

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The Size Of The Project

Replacing your roof may mean removing and replacing decking, as well as repairing water damage. Both may add to the final cost of your project. It may also cost more if roofers have to work around chimneys and skylights.

The ease of which a contractor can access your roof is another factor which can affect the final cost. In general, the easier access, the less time and materials are needed to do the job.

Diy Roof Replacement Vs Hiring A Roofer

Tips To Help Homeowners Choose The Right Roofing ...

For homeowners looking at replacing their roof instead of hiring a professional, an asphalt roof will cost $3,000 less to $6,000 less . However, while small roof repairs are cheap and relatively easy to carry out by the homeowner, as long as safety precautions are taken, roofing a home is better done by professional roofers. The downsides of completing the work as a DIY project are:

  • In removing the original roof, you may cause issues that will lead to leaks.
  • Once the old roof is off, you could miss structural issues or things that will contribute to more leaks.
  • You might not create a perfect weather seal to protect your home from the rain when installing the new roof.
  • You could introduce issues that translate to increased utility costs from heating or cooling.
  • You could fall from your roof.
  • You could negatively impact the resale value of your home.

Your roof is the single biggest surface barrier between you and the elements. Given the importance of the roof, and the potential for significant problems, we suggest looking for bids from the roofing professionals we have on HomeGuide before making a final decision to do the work yourself.

Get free estimates on HomeGuide from trusted roofing companies:

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