How Many Squares Is My Roof

A Roofing Calculator For Quick And Easy Measurements

First you have to measure each side of your house from the ground using a measuring tape. If you multiply the length by the width youll know the ground area of your house. Many times a house does not have a square or rectangular shape. If your house has an irregular shape, you have to divide the ground area in separate parts and figure their area. To know the total area of the house, simply add them together.

The second step is to convert the area of the house in roofing squares. Each 100 square feet of roof is one roof square. So you have to divide house area by 100. If your house area is 2000 square feet, the number of roofing square for the roof will be 20. In metric system, the house area will be approximately 186 square meters, because 1 meter is equal to 10.76 feet. The number of roofing squares for 186 sq. meters is also 20.

The next step is calculation of the roof pitch. Roofs have one of three pitches: low, medium or high. A low pitch rises 3 inches every 12 inches of base horizontal length. A medium pitch rises 6 to 9 inches every 12 inches of base horizontal length. A high pitch roof rises more than 9 inches for every 12 inches of base horizontal length. You can estimate the roof pitch by sight.

Roof pitch

Finally, to get the square roof area multiply the number of roofing squares for a low-pitch roof by 1.06 to 1.42 depinding of the roofs pitch. to get the square roof area.

How Many Bundles Of Shingles Per Square

A package of roofing shingles is called a bundle. Laminate or architectural shingles, one of the most common types of roofing shingles, are generally packaged in three bundles per square.

So in the 2400 square foot gable roof example, you would need 72 bundles of shingles .

Here are a couple more examples:

What About The Waste Factor Should I Order Extra Roofing Materials

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.

Recommended Reading: How Many Screws Per Square For Metal Roofing

Roofing Pitch For Square Roof Area

Finally, the more complex part, measuring your roofs pitch.

Low Pitch: 1.07 x Roofing SquaresMedium Pitch: 1.185 x Roofing SquaresHigh Pitch: 1.36 x Roofing Squares

NOTE:We understand a roofs pitch makes this process somewhat tricky. Enjoy Home Advisors free roofing square calculator right here.

How To Estimate The Size Of A Roof

If youre replacing a roof, the first consideration needs to be the roofs size so you can accurately estimate project materials.

In the U.S., roofs are measured in square footage, and roofing contractors typically quote projects based on the size of the roof in squares. Consequently, gathering the size of the roof in squares and square footage is the first step.

Get Free Project Estimates

Find Qualified Roofing Professionals in Your Area

You May Like: How Many Screws Per Square For Metal Roofing

Whats Your Roof Slope

You will also need to know the slope of your deck.

To determine this, measure the vertical rise of your deck in inches over a 12 horizontal distance.

If this rise is 4, then your roof slope is 4 in 12.

Roof slopes are always expressed with the vertical rise mentioned first and the horizontal run mentioned second.

How Many Bundles Of Shingles Do I Need For 30 Squares

An average roof size is about 30 squares so . This means you would need 30 squares of shingles to replace that roof. The most common type of shingle , called a three-tab or strip shingle , is generally packaged three bundles per square so you would need about 90 bundles . Happy Measuring!

Also Check: Mobile Home Ceiling Panels Sagging

How Big Is A Square In Roofing

The calculations above will give you the total number of square feet of the roof area.

As you have noticed in the roofing industry however, the surface of the roof is being measured in squares. This refers to the roof area that measures approximately 100 square feet.

Therefore: 1 Square in Roofing = 100 square feet

Now, in order to determine how many squares are there on the gable roof for example, all you need to do is divide the total square footage by 100.

• Total square footage from Example 2 above: 28,000 sq. ft.
• Number of squares for 2 planes: 28,000 sq. ft. ÷ 100 = 280 squares

This means that both planes of the roof will require 280 squares of shingles. A three-tab shingle, which is most commonly used, is packed in 3 bundles per square.

Figure Out Your Homes Footprint

If you use the square footage of your home, youll only get a vague idea of what the square footage of your roof is. Thats why you have to figure out your homes footprint.

A person of average height will have a stride somewhere between 2 to 2.5 feet. To figure out your homes footprint, you can step off the dimensions of your roof by counting the steps you take to get the length of your home. You will then step off the width of your home.

After stepping off the length and width of your home, youll multiply the two numbers to get your homes footprint.

Length x width = your home’s footprint

Your calculations are going to be off, but measuring this way can give you a basic idea of your homes footprint. Keep in mind, square footage of a house does not equal the square footage of a roof.

Recommended Reading: Where Do The Screws Go On A Metal Roof

Do You Need Roof Repair Replacement Or New Installation In The Fort Worth Area

If so, TX Roofing Solutions is the first choice for residents in the Dallas, Texas, area.

Providing free, no-obligation roof inspections, our company can handle any service request you may have. Whether youre in Euless, Arlington, Flower Mound, Keller, Coppell, Grapevine or a surrounding area, were happy to provide you with honest, reputable roofing services.

Call us today at 726-1369 or complete our form here to request your free, on-site roof inspection.

How Many Squares Per Roll Of Underlayment

The roll size depends on the type of underlayment product. Synthetic underlayment comes in 10 square rolls, while regular #15 felt comes in 4 square rolls.

So for the 24 square roof example, you would need 2.4 rolls of synthetic underlayment, or 6 rolls of regular #15 felt.

• 24 squares ÷ 10 squares per roll = 2.4 rolls of synthetic underlayment
• 24 squares ÷ 4 squares per roll = 6 rolls of regular #15 felt

Remember: Add 10%-15% for the waste factor on underlayment, as well.

Finally, if you have any questions about your estimate, ask a roofing contractor in your area. Most will be happy to give you a free estimate.

Recommended Reading: How To Get Roofing Leads Without Door Knocking

How Do You Calculate Square Footage For A Roof

Related Articles

• How to Measure a Roof From the Ground

When a roof needs to be replaced, one of the first steps you may perform is figuring out the roof area. Both the roof area and pitch contribute to the cost of a roofing job. Calculate square footage for a roof by measuring and by performing some basic math equations. With the area measurement, you can learn the approximate cost of a new roof. Use this information if you are purchasing a home that needs a new roof or if your current home needs one.

Things You Will Need

Tips For Calculating Roof Area So Youll Know How Many Bundles Per Square Youll Need For Roof Area Coverage

So you need a new roof, whether its to adorn your newly built home or to replace your existing roof. Like most North Americans, youve wisely decided to go with asphalt shingles due, in large part, to their vast range of styles and color blends. Like most of your neighbors, you plan to have the shingles installed by a professional roof contractor who will handle all the material calculations however, the information below will help you understand how to estimate the amount of shingles and accessory materials you need for your roof.

Calculating how many shingles you need for your roof is very similar to calculating how much carpet you need for your floors or how much wallpaper you need for your walls simply determine the area of the roof and divide by the area covered by each package of shingles.

Sounds simple, right? The only hard part is getting the actual measurements, and there are various ways to do this. Most likely, the roofer will physically get on the roof and, using a good old-fashioned tape measure, measure the areas of all the various roof sections and total them together. Of course, if the house is a new construction, these values will be readily available from the architectural drawings.

Recommended Reading: Shingling A Shed Roof

How To Measure A Roof

This article was co-authored by David Bitan. David Bitan is a roofing professional, licensed contractor, and the owner and founder of Bumble Roofing based in Southern California. With over 12 years of construction industry experience, David specializes in restoring, repairing, and maintaining residential, commercial, and industrial roofs. With over 60 years of combined experience, Bumble Roofing provides easy, friendly services to structures including residential, commercial, industrial, multi-family, and government buildings along with hospitals, hotels, and churches.There are 13 references cited in this article, which can be found at the bottom of the page. This article has been viewed 342,863 times.

Measuring your roof is the first step in a successful re-roofing project. You can actually get an estimate of your roof’s measurements from the ground if you’d rather not climb a ladder and get up on the roof yourself. Otherwise, you can climb up onto your roof to take more accurate measurements. Either way, we’ve got you covered! This article will walk you through each process step-by-step.

Finding The Size Of The Roof In Squares

Roofing contractors estimate projects and materials by the square, so it is crucial to find this measurement to estimate the amount of material needed accurately. A square simply refers to a 10 x 10 square of roofing. This is simply 100 square feet of roof.

To find the squares, divide the overall roof area by 100 and then round up. For instance, if the roof is 1550 square feet, then it is 16 squares.

Also Check: Roofing Costs In California

How To Measure A Roofing Square

Starting a new roofing project can introduce homeowners to many roofing-specific terms, and one of the first you’re likely to come up against is “roofing square.” Measuring in squares is unique to the roofing industryfor homeowners, understanding how these measurements work can be an unfamiliar but vital part of planning for your roof repair or replacement.

Roofing Squares To Square Feet

Please share if you found this tool useful:

Similar Area Units

You May Like: How To Repair Roof Trusses

How To Calculate Number Of Roofing Shingles

Fortunately, you don’t have to make a haphazard shingle estimate when planning for your roofing project: your roof size and chosen shingle type will guide the purchase process.

Shingles are sold in prepackaged bundles, not individually. Roofing manufacturers take the guesswork out of how many bundles you need per squareit’s listed in the specifications of each shingle they make. The specs for any given shingle will tell you how many bundles make up a square, how many shingles are in a square, and even the approximate number of nails you’ll need per square.

Often, three bundles of prepackaged asphalt shingles make one square, as is the case with the Timberline® HDZ Shingles. That said, the number of bundles you need can vary depending on shingle design. For example, five bundles of architectural asphalt shingles with artisan-crafted shapes, such as the Grand Sequoia® Shingle, cover one square. Once you know the number of squares of material your roof needs, check the shingle manufacturer specifications so you get your hands on exactly what you need.

If you’re still deciding on the perfect shingle for your roof, play around with the GAF VirtualRemodeler. The free online tool helps you envision how different shingle colors and styles would work with your home’s style. Be sure to keep local building codes in mind as you weigh your shingle options..

Find The Area Of The Footprint Of The Roof

To calculate a roofs dimensions, you need to measure the roof as if it were flat, then account for roof pitch, calculate square footage, and finally determine how many squares of material are required for the roof.

The calculator above can handle all of this, simply enter the length, width, and pitch, and it will determine the size of the roof in squares.

Start by measuring the roofs length and width in feet as youre standing on the ground. Remember that the length and width need to be found for the roof, not the house, so take into account that the roof overhangs the building.

Then determine the area of the roof as if it were flat. Multiply the length by the width in feet to get the area measurement.

You May Like: Skylight On Metal Roof

How Many Square Feet Is The Average House Roof

100 square feet

. In this regard, how many square feet is my roof?

Determine the square footage of one floor of your home. Multiply this number by your most recent result to get the estimated square footage of your roof.

Furthermore, how big is the roof on a 2000 sq ft house? Average Cost to Replace a Roof per House Size

Subsequently, one may also ask, is the square footage of a house the same as the roof?

Roofing Quote Footage is Not the Same as Home Square FootageThe roof square footage is what we need to calculate a budget quote to do the job. All these things could add much square footage to that 1,500 sq. ft. number.

How much does it cost to roof a 800 sq ft house?

The cost of roofing a house can vary depending on material, size, and roof type. The average cost of a roof is around $6,750.

How Many Shingles Come In A Bundle

How many square feet does a bundle of landmark shingles cover. Certainteed roof shingles are on the pricey side, compared to other asphalt shingles, and installing them on a 1,600 sq.ft. Read the label carefully, as some brands need a bit more than three bundles to cover a square. To find the amount of shingles you will need, multiply the number of squares by three.

Most shingles come 3 bundles to a square which is equal to 100 square feet. Roof shingles are sold by both the bundle and by the square. Singles are often sold in bundles, with three bundles equaling one roof square.

Each square represents 100 square feet of roof area. There are approximately 3 bundles per 1 square of roofing . step 3 look at the bundle of cedar shingles to see how many bundles it takes to make up one square of shingles.

How much is a bundle of shingles? 4 4 installation the following is a general summary of the installation methods. It is important to note that there is not a uniform number of shingles per bundle.

1 bundle of malarkey shingles weighs about 60.5 lbs. Dimensions 13 1/4 x 38 3/4 13 1/4 x 38 3/4 13 1/4 x 38 3/4 shingles/square 66 66 66. Shingles are sold by the bundle and by the square.

Ft.) what about the waste factor? A square represents 100 square feet of area covered by shingles. How to figure how many squares are needed for.

5 5/8 shingles per square: Keeping this in consideration, how many shingles are in. Malarkey shingle prices vs gaf, iko, certainteed.

Recommended Reading: Cost Of New Roof California