## How Much Does A Bundle Of Shingles Weigh?

Jul 25, 2023

How much does a bundle of shingles weigh? – A bundle of three-tab asphalt or architectural asphalt shingles typically weighs between 50-80 pounds, while slate shingles weigh over 300 pounds a bundle. The exact weight of a bundle depends on the shingle type and manufacturer.

#### What is the weight of a bundle of shingles?

Quick calculation for shingle bundle weight – If you don’t have a few minutes to read and just want the quick answer, here it is: Most bundles of modern architectural shingles weigh between 60 pounds and 80 pounds, You can use these figures to calculate a weight range if you want to know how much your new shingles will weigh because most homeowners replace their roofs with architectural shingles these days.

• Three tab shingles often weigh less than architectural shingles, coming in between 45 pounds and 60 pounds per bundle.
• How much a bundle of 3tab shingles weighs will likely be more helpful for you if you’re trying to calculate removal debris because many shingles being removed are of the 3-tab variety.

The number ranges above are just enough to get you started, so don’t let them be the “end all-be all” answer to how much the roofing material you’re tearing off your house will weigh. It’ll be hard to guesstimate the final number because you first need to know your roof size, and then need to consider a variety of other factors that will determine the total removal weight.

## How big is a bundle of shingles?

A package of shingles is called a bundle. There are between 15 and 29 shingles in a bundle. A bundle typically covers 33 square feet regardless of shingle type.

### Does the weight of a shingle matter?

Weight Of Your Roof – Does It Matter? Posted at 10:44 AM in, by When you begin researching different roofing materials, you will discover that roofs can be very heavy or they can be very low weight. The difference can be like parking three fully loaded dump trucks on top of your home, or half of a Mini Cooper.

• Depending upon the type of material you choose, the roof on a 2500 square foot home may be as little as 1750 pounds or as much as 50,000 pounds.
• It seems hard to believe, but it’s true! So, does it make any difference what your roof weighs? Actually, yes it does.
• Let’s take a look at some of the factors that need to be considered.

First of all, some roofs are heavy largely because it is weight and gravity that holds them securely to the roof. Many roofing materials have no interlocking features and few fasteners securing them to your home’s structure. Those materials need to be heavy or else they will not hold securely in high winds! Other materials, though, which feature interlocks between the panels or shingles, and which are secured to the roof deck, can be very wind resistant while also being very low weight.

1. Next, as a home ages, its structural materials often weaken.
2. This can be a factor with most engineered woods and even with dimensional lumber.
3. It is often a huge factor with fire-treated woods.
4. Lower strength means that the home is more likely to shift or move under the heavy weight of roofing materials.

Taking some of the weight off of the home can help preserve the home’s life as well as its structural integrity in the event of a catastrophic wind storm. A lower weight roof can also protect the home from damage due to earthquakes and other seismic activity.

Here is a list of sample roofing material weights, per 100 square feet:Aluminum Shingles 45 poundsAluminum Standing Seam 70 poundsSteel Shingles 80 poundsSteel Standing Seam 120 – 150 poundsStone-Coated Steel Shingles 125 – 150 poundsAsphalt / Fiberglass Shingles 275 – 325 poundsDimensional Shingles 350 – 425 poundsComposite Shingles 350 – 450 poundsWood Shingles 300 – 400 poundsWood Shakes 450 – 600 poundsConcrete Tile 450 – 700 poundsSlate 900 – 1200 poundsClay Tile 900 – 1500 pounds

At McCarthy Metal Roofing, we believe that a homeowner’s best option is a low weight roof which features secure fastening to the roof deck and interlocking panels with the strength of metal. Homeowners get the best of all worlds with these products! Please contact us today if you’d like to discuss a metal roof for your home! : Weight Of Your Roof – Does It Matter?

## How many pounds is a roofing shingles?

How Much Does A Bundle Of Roofing Shingles Weigh? You’ve probably always dismissed the weight of shingles as something that only your roofing contractor needs to be all that concerned with. After all, they give you the assessment and feasibility of a given material being used, and they’re the ones removing the old roof and putting the new one on.

• You’re not lifting anything, right? Well, you may be surprised to realize that the weight of shingles does have ramifications for you in the fact that you have to do something with those old, discarded shingles.
• See, most contractors don’t provide disposal of these materials, which places the rental of a dumpster and the hauling away/disposal of the old materials firmly on your shoulders as the homeowner.

It’s easy to just think “I’ll overestimate by a likely wide margin and be done with it”. If you’re independently wealthy, then sure, that works fine, but for most people, budgets matter. If you overestimate by these deliberate margins, you’re throwing money out the window.

Conversely, if you try to be accurate, but merely make an educated guess, you could badly undershoot, which causes all manner of logistical problems in the long run. Let’s take a look at some roofing concepts that will help you to estimate the weight of these materials, so you can make an educated choice in handling this aspect of roof replacement without going bankrupt.

Understanding Roofing Square In roofing terms, when it comes to shingles, this is the most basic unit with which they measure things. It’s not a square foot, but rather about 100 square feet. So, following that logic, a 1000 square foot roof is 10 roofing squares.

Now, this isn’t the unit shingles come in – no, that’d be too easy, wouldn’t it? Shingles come in bundles, which are about 1/3 of a roofing square. So, our theoretical 1000 square foot roof (that’s a pretty big house), which is 10 roofing squares, comes up to about 30 bundles of shingles. Now, if that’s not enough math to confound you, try thickness/durability on for size, which can reduce this to a quarter of a square in some cases.

Generally, the thicker and more durable the shingle, the less area it will cover. Hard(ish) Figures So, now that we understand that the coverage area of a bundle can fluctuate, we can give a general range of how much a bundle of shingles weighs. A single square can weigh between 150-240 pounds, with a single bundle being between 50-80 pounds.

#### What is a square of shingles?

One roofing square, or square of roofing shingles, is the amount of material needed to cover 100 square feet of roof area. The term is used by contractors, manufacturers, and suppliers as short hand to describe a roof’s size. For example, a 1,800 square foot roof is 18 square.

#### How much does 1 bundle of shingles cover?

How to Measure for Roofing Shingles One of the biggest challenges for pros and DIYers alike is accurately estimating materials for a construction project–especially for roofs as they are hard to access for taking measurements. It doesn’t have to be so tricky if you follow these reliable methods for determining the area of a roof and tips for estimating the number of extra shingles you’ll need for waste, overlaps, and starter shingles.

• Remember, it is critical to take your time and double-check your numbers when calculating the quantity of shingles, underlayment, flashings, and any other materials needed for your roofing project.
• Accurate estimates mean less time wasted while waiting for material deliveries during the project.
• How Shingle Quantities are Measured shingles are sold by the bundle and by the square.

The quantity needed to cover 100 sq. ft. of roof is a square of shingles. They are packaged in plastic or paper wrapped bundles designed to be light enough for a person to carry, so heavier shingles require more bundles per square. Typically, there are three bundles to a square; this applies to most three-tab strip shingles and some lightweight laminated shingles.

• Heavier three-tabbed shingles and laminated shingles may require 4 or 5 bundles to cover a square.
• There are 29 standard-sized shingles (12 in.
• By 36 in.) in each bundle when they come three bundles to the square The first step in determining how many bundles you’ll need to order is to calculate your roof area.

You can measure a new or freshly stripped roof in two ways: the measurement method and the sheet-count method. A third method is for calculating bundles when your old roof is still in place and you’ll be laying new shingles over the existing roof. When you have a bundle or square count for the main roof area, you will then add additional shingles to account for waste, starter shingles, and extra shingles for hip and ridge caps.1.

• Measurement method The most accurate way to calculate how many bundles of shingles you’ll need is to get up on the roof and measure each roof plane.
• If all the roof planes are rectangles, you simply need to multiply the length times the width of each plane to get the square footage; then you will add up the square footage of each plane.
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Many times, the roof may be too steep to walk on without safety equipment, so you will have to do the estimate from the ground. If this is the case, measure the length of the building at the ground level and estimate any rake-edge overhangs. Next, from a ladder, use a stiff, wide blade measuring tape to measure from the edge of the eaves to the ridge.2.

Sheet-count method If the sheathing is still exposed you can use the sheet-count method, which is sometimes preferred more than the measurement method. This method is fast, and you can usually complete it from the ground. The caveat is you can use this method only on roofs sheathed with 4x8ft. structural panels.

Each of these panels is 32 sq. ft., and you can easily count the full panels from the ground. Another way to tally them up is by estimating the relative size of ripped and crosscut sheets along the edges of the roof to the size of a full sheet. Diagonally cut sheets along hips and valleys are a bit more of a challenge to size, but typically you can assign them a relative size, like half or quarter sheet, and it will be close enough Calculating the number of bundles, you need is simple if you are using shingles that come three bundles to a square.

1. Each bundle covers 33.3 sq. ft.
2. Of roof area—which is close enough to the 32 sq. ft.
3. A sheet covers, which means you can order one bundle for each sheet of roof sheathing.
4. If you are working with other bundle counts per square, simply divide the number of sheets of sheathing by three and you’ll have the total number of squares needed to cover the roof – this is because three sheets of sheathing equal roughly 100 sq.

ft. (one square).3. Shingle-count method This method makes it easy to measure when the old shingles haven’t been stripped off yet or if you’ll be doing a layover (meaning shingling over existing shingles). To start, measure the length of the eaves of each roof plane, either directly from on top of the roof or from the ground by measuring the length of the house and adding in the width of the rake overhangs, if any.

Alternately, if the existing shingles are standard three-tab, determine the eaves’ length by counting the number of tabs along the ridges and eaves to determine the length in feet (note that one tab is equal to 1 ft.). Count the existing courses of shingles from eaves to the ridge to get the length of the rakes.

The exposure on each course of shingles is five inches, so multiply the number of courses by five inches and then divide by 12 to get the length of the rakes. Make sure you check that the existing shingles are not metric size and are the standard 12-in.

By 36-in. shingles. To get the area in square feet just multiply the length of the eaves by the length of the rake and Calculating the Area of a Complex Roof Areas of complex roofs with many hips and valleys take the most time to calculate. To get started, make a rough sketch of the roof. To simplify things, break down the sketch into rectangles and right triangles and then take as many measurements of the roof as you can to match the sides of the rectangles and triangles on the sketch.

Square lines off eaves edges or ridges can be determined by using visual cues from the existing roof. These will help you measure the lengths of the sides of the rectangles and triangles. For example, the cutout slots on shingled roofs run perpendicular to the eaves, and nail rows in sheathing are very close to square as well.

While it can be challenging sometimes to get accurate measurements, don’t be too concerned and round lengths to the nearest 6 in. When your sketch is filled in with measurements, determine the size of the roof area. The area of a rectangle is length multiplied by width, while the area of a right triangle is the length of the two sides that meet at the 90-degree corner multiplied together and divided by two.

Add up the square footages of all the rectangles and triangles; this will give you the total square footage for the roof.

#### What are 3 bundles of shingles called?

Roof shingles are sold in bundles and by the square. One package of shingles is called a bundle. Most manufacturers pack them so three bundles equal 100 square feet or one roofing square.

## What is the size of one shingle?

IKO Shingle Dimensions – Chart to Compare Asphalt Shingle Sizes – IKO Once upon a time, traditional strip or 3-tab shingle dimensions, as well as asphalt shingle dimensions, measured 12 inches wide by 36 inches long. These are still considered standard asphalt shingle dimensions. The dimensions of an architectural shingle vs. a 3 tab shingle IKO was among the first to introduce the “metric-size” roofing shingle, defined as being 13-1/4 inches long by 39-3/8 inches wide. Admittedly, it’s rather confusing to call a shingle “metric” and then proceed to define it in Imperial measure; however, 39-3/8 inches is the equivalent of one meter.

3 Tab Shingle Exposure Architectural & Performance Shingle Exposure Below is a handy chart to check IKO shingle dimensions at a glance:

IKO SHINGLE DIMENSIONS & EXPOSURE*
SHINGLE SIZE EXPOSURE
Armourshake TM Designer 37-3/8″ x 18-1/2″ (950 mm x 470 mm) 5-1/2″ (140 mm)
Crowne Slate TM Designer 39-1/2″ x 13-1/4″ (1,003 mm x 336 mm) 10″ (254 mm)
Royal Estate TM Designer 40″ x 13-1/4″ (1,016 mm x 336 mm) 5-5/8″ (143 mm)
Nordic TM Performance 40-7/8″ x 13-3/4″ (1,038 mm x 349 mm) 5-7/8″ (149 mm)
Dynasty ® Performance 40-7/8″ x 13-3/4″ (1,038 mm x 349 mm) 5-7/8″ (149 mm)
Cambridge ® Architectural 40-7/8″ x 13-3/4″ (1,038 mm x 349 mm) 5-7/8″ (149 mm)
Cambridge Cool Colors TM Architectural 40-7/8″ x 13-3/4″ (1,038 mm x 349 mm) 5-7/8″ (149 mm)
Marathon TM PLUS AR Traditional 39-3/8″ x 13-1/4″ (1,000 mm x 336 mm) 5-5/8″ (143 mm)

All values shown are nominal. Today, the dimensions of architectural shingles may vary from one manufacturer to another for several reasons, such as the physical limitations of the laminators, the dimensions of the fiberglass mat used (especially if the manufacturer makes its own as IKO does), the profile, cut and shape of the individual shingles or simply to create a point of competitive differentiation.

IKO offers four different categories of quality asphalt shingles: Performance, Designer, Architectural and Traditional (3-tab) Collections. The size and exposure of the shingles within each Collection vary, as shown in the chart above. For example, IKO Marathon TM Plus AR belongs to the Traditional Collection of 3-tab shingles and possess those standard metric shingles dimensions.

### Do you staple shingles?

Mastering Roof Inspections: Asphalt Composition Shingles, Part 25 by Kenton Shepard and Nick Gromicko, CMI® The purpose of the series “Mastering Roof Inspections” is to teach home inspectors, as well as insurance and roofing professionals, how to recognize proper and improper conditions while inspecting steep-slope, residential roofs.

FASTENERS, Part 1 One of the key components in the wind resistance of shingles is the fasteners that hold them to the roof.How effectively fasteners hold shingles in place depends on four things:

the type of fastener;proper fastener installation;fastener placement; andthe holding power of the substrate.

Disclaim Proper Fastening You should disclaim proper fastening of asphalt shingles in your report and in your inspection agreement. Confirming proper fastening would require breaking the bonds of all the adhesive strips to examine all the fasteners, and you will not do that.

For asphalt shingles, the adhesive strip is the most important component in resisting wind damage. Your disclaimer should state that you don’t inspect each fastener, and tell why. If you do break the bonds of a few adhesive strips to check a representative number of areas, your report should state that you inspected a representative number of fasteners only.

If you don’t inspect fasteners and fail to mention this in your report, you may be found liable in court for roof failure related to proper fastening. Disclaim confirmation of proper fastening. Jurisdictional Requirements Another reason not to confirm proper fastener installation is that you’d need to be sure of the jurisdiction in which the property you’re inspecting is located, and you’d need to be sure of the jurisdictional requirements.

• If you’re wrong about either one, you could find yourself being sued for a new roof.
• Fastener Type The type of fastener used to fasten the shingles is especially important in resisting wind uplift and pull-through.
• Fasteners for asphalt shingles should be roofing nails or staples.
• The head of a roofing nail or the crown of a staple is what actually holds a shingle in place.

Although both nails and staples have been used in the past, staples are often not recommended in areas subject to high winds, and they are not allowed in new construction by the IRC. Shingles fastened with staples are often not warranted against wind blow-off. To hold properly, staples need to be installed with the crowns aligned with the long axis of the shingle. As an installer uses an air-powered staple gun, his natural tendency is to rotate his body. Unless he also rotates his wrist at the same time, the orientation of the staple crowns will reflect this rotation. This roof has staples that were poorly installed, and the shingles were poorly bonded, so their wind resistance was low. The minimum staple crown width is 15/16-inch. Properly installed, stapled shingles will usually withstand wind speeds of up to 60 miles per hour.

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Upgrading the fastening system requires re-fastening the shingles with roofing nails. The shingles may need to be hand-sealed afterward, since the adhesive bond may not re-seal adequately. If you see staples used to fasten asphalt shingles on a home that is in an area that can experience high winds, you should mention in your report that staples are not the preferred method of fastening.

If they are not allowed in new construction in the area where the home was built, mention that fact, too. Don’t call their use a defect unless you know it’s a defect. If staples were allowed at the time the shingles were installed, it’s not a defective installation.

Re-fastening can be difficult or impossible. The adhesive strips have to be broken on all the affected shingles, the shingles have to be re-fastened, and then all the shingles have to be hand-sealed. Shingles may be irreparably damaged, or they may never bond completely. Do not recommend that shingles be re-fastened.

Just describe the condition, and leave it at that. Nails Some shingle manufacturers specify that their shingles be fastened with nails. You won’t know which shingles those are, so that’s one more reason that confirming proper fastening exceeds the scope of your inspection.

### Can you stack shingles on a roof?

Disclaimer: Please use caution when stacking bundles on sloped roofs. To save time, most roofers prefer to stack several shingle bundles on the roof before beginning to install them. However, shingles can be damaged if they are stored or stacked incorrectly, which may reduce the life span of the roof.

On high-pitched roofs, nail down a board just below where you will lay the shingle bundles. This will prevent the shingle bundles from sliding, which would be a safety hazard and could damage the roof. Carefully lay the bundles flat out on the roof. Do not take them out of their packaging before setting them down. You may carefully lay 3-tab shingle bundles over the roof ridges or hips, so long as you don’t lay too many bundles in the same spot. Laminated architectural shingles should, preferably, not be bent over the roof ridge or hips. Only stack a few bundles high, so there’s no risk of them toppling over. A shingle bundle typically weighs 75 – 80 pounds, so stacking many of them could put a lot of pressure on the roof, which may cause damage. Choose a new location for other bundles, so that the roof doesn’t have to hold too much weight in one area. This also makes the shingles easier to access when you’re working on different parts of the roof. Avoid stacking the shingle bundles near vulnerable areas of the roof where damage is more likely, including the valleys.

## How are roof shingles transported?

The Best Way to Ship Roofing Tiles – Shipping roofing tiles in large quantities is usually done via full truckload freight, on flatbed trailers, or in dry vans. If you are shipping a small number of roofing shingles that can be shipped in a dry van rather than a flatbed, you may be able to save money by shipping LTL (less than truckload).

#### Can shingles be too heavy for roof?

You should consider these structural factors –

Weight limits of your house While shingles are often seen as light compared to the components of the rest of the house, the fact is that they are frequently a considerable portion of the mass of a house. Not all houses are built to support all types of shingles. The weight limit of most typical house roofs is around 15 pounds per square foot of roof, which is a reasonably robust but not infinite amount of weight. Some heavier types of shingles can easily exceed this mark, and older houses that haven’t been kept up properly could shudder and shake under that kind of weight. So, knowing the per-square-foot weight limit of your roof is going to be a large part of making the right choice to keep your home dry and standing for years to come.

The slope and pitch of your roof First off, let’s make sure we’re understanding these terms correctly. The slope of your roof is the amount the roof rises in inches for each foot of its depth into the house, so a house with a roof that rises one inch per foot would have a very shallow slope, whereas one that rises eight inches per foot would be incredibly steep. The slope is expressed as a ratio, 1:12 for the first house and 8:12 for the second. The pitch of a roof is a fraction that represents the rise of the whole roof from edge to peak over the entire span of the roof. So, a roof that was 100 feet in span that rose 10 feet up would have a pitch of 10/100 or 1/10. Depending on the pitch and slope of your roof, certain types of shingles might not be appropriate for your house. Larger clay and stone shingles, for example, might slide right off a steeper roof or have trouble staying in place in the long term. Again, this is something you should know before you go shopping to avoid setting your sights on something that’s not available for your home.

## Do heavier shingles last longer?

What is the longest lasting asphalt shingle? – Of the 3 types of asphalt shingles, the longest lasting are luxury (or premium) asphalt shingles. Luxury asphalt shingles are larger and thicker than 3-tab or architectural shingles, which makes them more durable. Luxury asphalt shingles should last up to 30 years, and that number can be pushed even further in perfect conditions. For comparison, architectural asphalt shingles will last around 22-25 years. While it’s great to put numbers on a roof’s lifespan, just know there are a lot of factors that ultimately impact the life of a roof,

## How many tons are shingles?

How many asphalt roofing shingles will fit into a dumpster? – It depends on what size dumpster you order. We have 6 yard, 20 yard 30 yard dumpsters for roof tear offs. Please allow extra room for general construction debris such as pallets, gutters, cardboard packaging, sheets of plywood.

• Each dumpster has a tonnage cap.
• This is not the dumpster’s weight limit.
• If your dumpster goes over the ton cap you may be charged per ton over the cap.
• This charge is prorated.
• How much do asphalt roofing shingles weigh? 250 lbs per roofing square.28 square = 3 ton (approximately).
• Make sure you factor in how many layers you need to remove or “tear off”.

Order your dumpster online and save \$20. Keep your dumpster for one day or up to 15 days. How do I rent a dumpster for roofing?

## Are shingles heavier than metal?

Metal Roofs Versus Other Roof Materials | Englert You’ll be surprised to learn that a, and 75% lighter than concrete tile, fiber cement shakes and slate. With metal roofing, weight on a structure is never an issue. And in cases where metal may be installed over an existing roof, it may be the only practical answer because other materials may add too much weight load for the existing roof to bear.

Asphalt Shingle: 2 – 3.5 pounds per square footTextured Asphalt Shingle: 3.5 – 5 pounds per square footWood Shingles/Shakes: 3.5 – 4.5 pounds per square footClay or Concrete Tile: 5.5 – 10 pounds per square foot

Steel standing seam will weigh about 85 – 120 pounds per 100 square feet of roof area. Aluminum standing seam weighs about 70 pounds per 100 square feet. In contrast, asphalt shingles weigh from 275 – 425 pounds per 100 square feet. Because standing seam metal roofing material is so light, some building owners assume you shouldn’t walk on it.

Absolutely not true. The truth is that you can safely walk on any metal roof applied over plywood or metal sheathing without damaging it. But before you do, check with your metal roofing installer or the manufacturer of your metal roofing material (ask your contractor) for instructions for your specific roof.

And of course, if you are walking on a roof, be careful! : Metal Roofs Versus Other Roof Materials | Englert

#### Are thicker shingles better?

Two Layers Are Better Than One – The laminated construction of dimensional shingles has several advantages. They are thicker and are thus more durable than three-tab shingles. Your roof is less vulnerable to curling and will have a longer lifespan. The double layer in one solid sheet of an architectural shingle gives it considerable weight.

## How thick should shingles be?

The Right Stuff: Factors That Determine Roof Thickness For a roof to be able to shield you from the elements, it must be strong enough to support the weight of the shingles. Its thickness depends a lot on the size of the rafters. There are other factors though, including the sheathing and shingles. Roofer Chicks®, the area’s most trusted expert, discusses them here. Rafters Rafters are the beams that support the weight of the roof sheathing and shingles. Their sizes and thickness (2-by-4 to 2-by-12) depend upon the pitch of the roof and its span. The larger ones are always used for greater lengths or lower-pitch roofs.

• Trusses Trusses are not as thick as rafters.
• They are several wood members that support a heavier load than a similar size rafter.
• Their dimensions depend upon the engineer’s specs for the roof.
• In general, a 2-by-4 roof truss will support as much roof load as a 2-by-6 or 2-by-8 rafter.
• Sheathing Standard roof sheathing consists of 4-by-8 plywood or oriented strand board, or OSB.
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It is 1/2-inch thick and attaches to the roof rafters or trusses. An exception may occur if you intend to install slate, concrete or tile shingles. To support the added weight, you need to install 5/8 inch roof sheathing. Shingles Asphalt shingles add very little thickness to the roof.

A standard three-tab shingle is only about 3/16-inch thick. When installed, however, they overlap, doubling the thickness. Wood, cedar shake, and tile are thicker, depending upon the brand of shingles you select. Metal roofing is thinner, corrugated or standing seam, which increases its height by 1 to 2 inches.

Whichever type you choose, we can do the right installation and for you. Roofer Chicks® prides itself on providing thorough and reliable service. Our crew is well-versed in all types of roof installation and repairs. We have been serving San Antonio, TX, and other nearby towns for over 15 years.

## How heavy is 20 squares of shingles?

How much does a square of shingles weigh? – The average weight of a square of three-tab asphalt shingles is 230-250 pounds, while architectural asphalt shingles typically weigh 400-430 pounds per square. A square of slate shingles weighs 800-1,000 pounds on average.

#### How do you calculate shingles?

Your roof is a major structural component of your home, and a successful reroofing project requires a large investment in both time and money. Since you cannot afford mistakes during installation, we highly recommend you hire a professional contractor.

• Our Find a Roofing Professional locator tool can help you find the roofing professional that’s right for you.
• If you have decided to do the work on your own, we’d like to help.
• Check out our estimating guidelines below and visit Choosing the Right Roof and Things You Should Know for additional information.

To estimate how many shingles you’ll need, first estimate the total square footage of your roof’s surface. To do this, measure the length and width of each plane on the roof, including dormers. Then, multiply length x width to get the square footage of each plane. For example, this shed roof has one roof plane. Simply measure length (A) x width (B): A x B = 120′ x 100′ = 12,000 sq. ft. for the total square footage of the roof. This gable roof has two planes. So, multiply length (A) x width (B) to get the square footage for each plane. Then, add the two planes together to derive the total square footage of the roof:

Plane 1: 120′ x 100′ = 12,000 sq. ft. Plane 2: 120′ x 100′ = 12,000 sq. ft. Plane 1 + Plane 2 = 24,000 sq. ft. for the total square footage of the roof.

Roof surfaces are measured in “squares.” A square is an area of roof which measures 100 square feet. To determine the number of squares on the gable roof above, simply divide its total of 24,000 square feet by 100. The result is 240, and this means you would need 240 squares of shingles to cover that roof.

1. The most common type of shingle, called a three-tab or strip shingle, is generally packaged three bundles per square.
2. For a new roof, you will also need the same amount of underlayment.
3. So, in the gable roof example above, you would need 240 squares of underlayment.
4. Underlayment usually comes in rolls of 4 squares each.

So, covering 240 squares would require 60 rolls of underlayment. No underlayment is needed if you are applying shingles directly over an existing asphalt roof. Be sure to add 10% to all of your material totals for trim allowance. Finally, if you have any questions about your estimate, ask a roofing contractor in your area. You will also need to know the slope of your deck. In order 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 (12″) mentioned second.

1. To measure a steep roof, you will have to use an alternate method.
2. To calculate the roof length, measure the exterior walls plus the overhang for the length of the house parallel to the ridge.
3. Next, throw a rope over the ridge and mark it on each eave.
4. This will give the width dimension to use in figuring your area.

This should be done on each roof section containing a horizontal ridge. You will also need to determine the amount of nails you’ll need. Generally, you should use four nails per shingle. For regular three-tab shingles, this would require 320 nails per square.

For high wind areas or when shingles are being applied to a mansard, six nails per shingle are required (480 nails per square). This is based on 80 shingles per square. Other styles of shingles may require more or fewer nails per shingle and may have more or less than 80 shingles per square. Refer to the application instructions on your shingle wrappers for the correct nailing pattern.

Nails are purchased by the pound, so ask your dealer for the correct amount of nails for your size roof, in the length you specify. Measure the lengths of your rakes and eaves to determine the amount of drip edge needed.

#### Is a bundle of shingles a square?

Roof Slope –

AREA/RAKE CONVERSION* (ROOF PITCH FACTOR)
SLOPE (INCHES PER FOOT) AREA/RAKE FACTOR
4:12 1.054
5:12 1.083
6:12 1.118
7:12 1.157
8:12 1.202
9:12 1.250
10:12 1.3052
11:12 1.356
12:12 1.414

To use the table, simply multiply the projected horizontal area by the conversion factor for the appropriate roof slope. The result is the actual area of the roof. With recent innovations in technology, a newer roof measurement option involves satellite and/or drone images, which, when properly calibrated, can yield an accurate roof area measurement.

1. One such service is available through EagleView Technologies,
2. Roofers can use these tools to save time preparing roof area estimates and can even export the information in the form of a job quote to homeowners.
3. Roof areas are generally referred to in the roofing industry using a term called a ” square,” which is simply 100 square feet of roof area,

While this area can also be measured in metric units (square meters), imperial square foot units are most commonly used and are solely referenced in this blog. Asphalt shingles are typically packaged with this in mind, but if a package of shingles covered an entire 100 square foot square, it would be too heavy to handle.

### How heavy is a bundle of Owens Corning shingles?

Owens Corning Duration Max shingles weigh 88.5 pounds per bundle, and, at 4 bundles per square, it is 354 pounds per square.

## How much do IKO Cambridge shingles weigh?

These IKO laminated roofing shingles weigh about 230 lbs/square.

### What size are asphalt shingles?

IKO Shingle Dimensions – Chart to Compare Asphalt Shingle Sizes – IKO Once upon a time, traditional strip or 3-tab shingle dimensions, as well as asphalt shingle dimensions, measured 12 inches wide by 36 inches long. These are still considered standard asphalt shingle dimensions. The dimensions of an architectural shingle vs. a 3 tab shingle IKO was among the first to introduce the “metric-size” roofing shingle, defined as being 13-1/4 inches long by 39-3/8 inches wide. Admittedly, it’s rather confusing to call a shingle “metric” and then proceed to define it in Imperial measure; however, 39-3/8 inches is the equivalent of one meter.

3 Tab Shingle Exposure Architectural & Performance Shingle Exposure Below is a handy chart to check IKO shingle dimensions at a glance:

IKO SHINGLE DIMENSIONS & EXPOSURE*
SHINGLE SIZE EXPOSURE
Armourshake TM Designer 37-3/8″ x 18-1/2″ (950 mm x 470 mm) 5-1/2″ (140 mm)
Crowne Slate TM Designer 39-1/2″ x 13-1/4″ (1,003 mm x 336 mm) 10″ (254 mm)
Royal Estate TM Designer 40″ x 13-1/4″ (1,016 mm x 336 mm) 5-5/8″ (143 mm)
Nordic TM Performance 40-7/8″ x 13-3/4″ (1,038 mm x 349 mm) 5-7/8″ (149 mm)
Dynasty ® Performance 40-7/8″ x 13-3/4″ (1,038 mm x 349 mm) 5-7/8″ (149 mm)
Cambridge ® Architectural 40-7/8″ x 13-3/4″ (1,038 mm x 349 mm) 5-7/8″ (149 mm)
Cambridge Cool Colors TM Architectural 40-7/8″ x 13-3/4″ (1,038 mm x 349 mm) 5-7/8″ (149 mm)
Marathon TM PLUS AR Traditional 39-3/8″ x 13-1/4″ (1,000 mm x 336 mm) 5-5/8″ (143 mm)

All values shown are nominal. Today, the dimensions of architectural shingles may vary from one manufacturer to another for several reasons, such as the physical limitations of the laminators, the dimensions of the fiberglass mat used (especially if the manufacturer makes its own as IKO does), the profile, cut and shape of the individual shingles or simply to create a point of competitive differentiation.

IKO offers four different categories of quality asphalt shingles: Performance, Designer, Architectural and Traditional (3-tab) Collections. The size and exposure of the shingles within each Collection vary, as shown in the chart above. For example, IKO Marathon TM Plus AR belongs to the Traditional Collection of 3-tab shingles and possess those standard metric shingles dimensions.