how many course of shingles in a roof in 8 feet high

by Ms. Aiyana Zemlak Published 3 years ago Updated 2 years ago 7 min read

Most commonly, only 2 layers of shingles are allowed per roof. Regardless of the code in your area, never exceed a maximum of 3 shingle layers, or the integrity of your roof will be compromised. Laying another set of shingles over your old layer is a way to save on excavation costs.

Full Answer

How many shingles do I need for my roof?

One important point is that it is possible to purchase shingles both by the bundle and by the roofing square. A square of shingles is the number of shingles needed to cover 100 sq feet of roof area. However, shingles are packaged in a way that they are light enough for the average person to carry around.

How do you calculate the number of shingles for a roof?

Roofing: Calculate the Number of Shingles. 1 Step 1 - Calculating the Square Footage. The first thing that you will need to do is work out the size of your roof in square feet. This is very easy, ... 2 Step 2 - Working out Number of Squares. 3 Step 3 - Work out Number of Bundles. 4 Step 4 - Allowing for Eaves, Mistakes and Difficulties.

What happens if you put too many shingles on a roof?

It's important that you have the right number of shingles on your roof, because if you have too few then it won't be waterproof. You will then need to go back to the store a second time to buy more. Ordering too many roofing shingles will waste money.

How many shingles are in a square?

However, shingles are packaged in a way that they are light enough for the average person to carry around. As a rule of thumb, there are 3 bundles to a square, assuming that you are using three-tab strip shingles. There are also 29 standard-sized shingles (measuring 12 inches by 36 inches) in each one of these.

How do you calculate how many shingles for a roof?

This makes it relatively easy to figure out how many shingle bundles your roof requires: simply multiply the number of roofing squares by three. If your roof's area were equivalent to about 20 roofing squares, then you would need about 60 bundles of shingles.

How many shingles do I need for a 8x10 shed?

How many shingles do i need for a 8×10 shed:– for a 8×10 shed roof, you will need approximately 2 squares or 6 bundles or 174 pieces of three tab strip standard-sized shingles (12 inch by 36 inch) when overhangs is 1 feet and roof slope is 6/12.

How many bundles of shingles are in 4x8 roof?

Each plywood sheet is 4 x 8 feet or 32 square feet, which coincidentally is almost exactly equivalent to the coverage of one bundle of traditional three-tab shingles. If it's a re-roof project and you have access to the original paperwork from the last shingle installation, that may be useful in showing the roof area.

How do I figure out how many bundles of shingles I need?

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. Divide total square footage by 33 to find how many bundles you need.

How many shingles do I need for an 8x8 shed?

How many bundles of shingles do i need for a 8×12 shed:- for each roofing square, you will need three bundles of shingles, so for 2 square = 3×2 = 6 bundles.

How many square feet in 8x10 shed?

Well, the simple answer is that an 8×10 shed is an 80 square foot storage unit that is fairly standard to a traditional shed you would see in a backyard.

How many feet does a bundle of shingles cover?

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.

How many feet does a square of shingles cover?

A square of shingles is the quantity needed to cover 100 sq. ft. of roof. Shingles are packaged in paper- or plastic-wrapped bundles designed to be light enough for a person to carry, so heavier shingles require more bundles per square.

How many bundles of 3 tab shingles are in a square?

How Many Bundles Of Shingles Are In A Square? There are 3 bundles of asphalt roof shingles per square. Some specialty styles of asphalt shingles that are larger or thicker may require 4 bundles per square, but the overwhelming majority of roof shingles are three bundles to cover 100 square feet of roof.

How many bundles of shingles do I need for a 12x12 roof?

Asphalt shingles and most other roof shingles are typically available in bundles. For each roofing square or 100 sq ft, you will need three bundles of shingles. The average size of 12×12 shed roof is 3 squares, which typically requires 9 bundles of three-tab asphalt shingles or any other starter strips.

How do you calculate roofing?

Multiply your house length by your house width to get the area. (For example, 40 feet x 30 feet = 1,200 square feet.) Next, multiply the area by your roof's pitch. (1,200 x 1.05 = 1,260 square feet.)

How Many Layers of Shingles Can You Put On a Roof?

Depending on where you live, and the building codes that apply to your home, a different allowance of shingle layers will pertain to you.

Should I Put a New Layer of Shingles On My Roof?

When deciding whether or not to put a new layer of shingles on, you must weigh the pros and cons. Additionally, confirm that you only have a single layer of shingles, to begin with, or else you are not a good candidate for this project.

Do I Need a New Roof?

It’s possible that your damaged roof isn’t a good fit for a second layer of shingles, in which case, you’ll need an entirely new structure put on.

The Bottom Line

In this article, we covered how many layers of shingles you can put on a roof and what to look for when deciding if it’s time for a new one.

Is It Okay To Overlay Shingles?

Overlaying shingles is a somewhat common practice, but it’s generally not recommended. There are several issues that can come up when you overlay shingles.

How Many Layers Of Shingles Can You Have On A House?

The number of shingle layers you can have on a house varies depending on the state you live in. Most states’ building codes only allow for two layers of shingles. However, you’ll still come across some houses that have as many as four layers of shingles.

Why Are Multiple Layers Of Shingles Bad?

There are several reasons why multiple layers of shingles are typically considered a bad idea.

Nail Quantity Per Square

Shingle manufacturers recommend using four nails per shingle in the main part of the roof and five nails per shingle in the first row, says Owens Corning. This amounts to an average of 320 nails per square, or 100 square feet. In high-wind areas, you need five nails per shingle, or 480 nails per square.

How To Measure A Roof For Shingles

Whether youre re-roofing your home or purchasing shingles for a brand-new house, its important to understand that a successful roofing project often requires a significant investment of both time and money. As you begin shopping for materials, you might wonder how to measure a roof for shingles.

Roofing: Calculate The Number Of Shingles

Roofing is a very important part of your house because it protects it from water. Without a watertight room water would be allowed to enter and stream down the walls in your house. It’s essential that the roof is in the very best condition.

How To Calculate A Roofing Square

Before beginning, make sure you can safely access your roofif you can’t, contact a roofing professional for help.

How To Measure Roof Square

Written by Darren Spears on Jan 05, 2010To ensure our content is always up-to-date with current information, best practices, and professional advice, articles are routinely reviewed by industry experts with years of hands-on experience.Reviewed by

How Many 3 Tab Shingle In A Bundle

For traditional asphalt 3-tab roof shingles, there are 26 pieces in a bundle. Architectural shingles will have around 21 shingles per bundle for similar square footage, as they are larger than standard 3-tab shingles. Depending on the shingle manufacturer, the number of shingles in a bundle can vary widely.

Estimating Materials Based On Decking

If you can see the plywood panels that comprise your decking, you can get a rough estimate by counting the number of panels. This requires that existing roofing has already been removed or that you can see the panels clearly from the attic. Most panels are 4 feet by 8 feet, making them 32 square feet.

BEFORE YOU BEGIN

Don’t climb onto the roof without taking some time to draw an overhead view of the roof in your notepad so the measurements can be recorded on the correct roofing planes. Each area of the roof is a separate plane, which means that when you are drawing these areas, they should be represented by clear, distinct 2D shapes, like a rectangle or square.

STEP 1: Set up the ladder and take appropriate safety precautions

Safety is the top concern when it comes to working at heights. Before you start, make sure to set up the ladder on level ground with the base extending out at least 3 feet (or 0.91 meters) from the edge of the roof. This will create a stable support for you to climb up.

STEP 2: Measure and calculate the square footage of each plane

Walk up to the peak of the roof to get an idea of the layout and make sure to orient the overhead sketch in the notepad to your current position. This will help ensure that you’re labeling each plane accurately. Choose the first section of the roof to be measured and lay your measuring tape out along the length of the plane.

STEP 3: Use the square footage to calculate the roofing squares

After taking measurements and calculating the square footage of your roof, you need to convert the square footage into roofing squares because shingle bundles are listed as typically covering about ⅓ of a square. So, how much is a square of shingles? In roofing, a “square” is equal to exactly 100 square feet (or 9.3 square meters).

STEP 4: Determine the number of shingle bundles required

Determining the number of shingle bundles that you will need is the next step in the process. Usually, a bundle of shingles contains enough material to cover ⅓ of a roofing square. This makes it relatively easy to figure out how many shingle bundles your roof requires: simply multiply the number of roofing squares by three.

STEP 5: Add an additional 15 percent to account for waste

You’ll likely encounter odd roof angles that require the shingles to be modified in order to fill the gap. You may also buy one or more packages with bent or cracked shingles that cannot be used. Additionally, DIYers should plan to make a few mistakes, because not every cut is going to be perfect.

Final Thoughts

Anytime you climb up to the roof—even when only taking a few quick measurements—you are at risk of falling and other hazards.

How many layers of shingles can be on a roof?

In most states, you’re only allowed to have 2 layers of shingles on a roof for fire safety reasons. However, you’ll still see roofs that have 3 or 4 layers today.

4 things to know about nailing over your current asphalt roof

Now that you know that you’re only allowed to have 2 layers of asphalt shingles and that it’s possible to nail over your old roof. Yes, nailing over your old roof will be cheaper than getting a complete roof replacement .

Is a nail-over or a roof replacement right for you?

Now you know 4 things to know about nailing over your old shingles. If your roof isn’t a good candidate for a nail-over, you’ll have to get a full roof replacement .

What is the slope of a roof?

What is the slope or pitch of a roof? The slope/pitch of the roof is the incline of the roof expressed as a ratio of the vertical rise to the horizontal run. This ratio is expressed as inches per foot. So a a roof that rises 4 inches in 1 foot or in 12 inches is called a 4/12 pitch or slope.

How to calculate square feet of roof?

Step 1: Multiply 20 and 40 which equals 800. Step 2: Find the value of 7:12 from the roof slope multiplier table which is 1.16. Step 3: Multiply Step 1 and Step 2, i.e. 800 multiplied by 1.16. Step 4: The value arrived at, 928, reflects the square feet of the roof. Example calculation:

What is drip edge shingles?

Ridge – there are various types, some cut from 20 or 25 year shingles (standard ridge) or high profile ridge which provides stronger ridges that are further resistant to damage, stand slightly higher and look nice on your roof cap lines. However in most cases regular shingles are cut to be used as ridge.

Where is the starter shingle?

Starter Shingle – is the shingle at the ‘bottom edge’ of the roof with the exposure portion trimmed off, leaving just the self-seal strip and top lap. They are fastened along the eaves edges to seal down the first course of shingles and provide coverage material beneath the tab cutouts just like the top lap of each successive course.

Do you need shingles for a square foot roof?

The first thing to know is that if you order shingles based solely on the Squares or Square foot area of the roof, you won’t have enough. You will need shingles for starter courses along the eaves and at some rakes, and you will need shingles to cap hips and ridges.

What is a Roofing Square?

A roofing square is a term used in the construction industry, and it refers to an area of the roof to make it easier to order the supplies you need. A roofing square does not refer to a measurement of square feet or square yards; instead, it is a term of measurement all on its own.

How to Measure a Roof

To measure a roof, you will need to secure a ladder safely to your roof so that you can climb up and get accurate measurements using a measuring tape. If you are unable to secure a ladder to your roof, then you should find a friend or family member you can stand at the base of the ladder and hold it to prevent it from moving.

How Many Shingles are in a Bundle?

Roof shingles are packaged and sold in bundles. Both architectural or laminate shingles come in bundles, which are also a standard pack size in order to make buying roofing supplies a more fool-proof process. A bundle includes enough shingles to cover a third of a square, therefore meaning you will need three bundles per roofing square.

How to Account for Shingle Wastage

There will always be a certain amount of wastage when constructing a shingle roof, but this can vary hugely depending on the shape of your roof and any extra features it has.

Do I Need to Understand Squares and Bundles?

If you are completing a DIY roofing job, then all the talk of roofing squares can seem overwhelming and unnecessarily complex. The good news is that your roofing supplier will understand the measurement of squares and will be able to calculate for you how many bundles you need.

How many Roofing Nails in a Square of Shingles?

Roofing nails are used to hold the singles in place securely, preventing them from coming loose in high winds or under the weight of snow.

Why is it important to have the right number of shingles on your roof?

Why is it important to have shingles on your roof?

Roofing: Calculate the Number of Shingles. Roofing is a very important part of your house because it protects it from water. Without a watertight room water would be allowed to enter and stream down the walls in your house. It's essential that the roof is in the very best condition.

How to figure out how many square feet of roof to cover?

The first thing that you will need to do is work out the size of your roof in square feet . This is very easy, as it's simply a matter of measuring the length and height of the room. Multiply the length and height of the roof together to work out the number of square feet that you need to cover.

Can roof tiles be damaged?

Roof tiles are very delicate and can be damaged easily. Also, working out the number of tiles around bay windows or eaves can be very difficult. You include 10-20% extra tiles to allow for any broken or damaged tiles. This also makes it much easier to tile around all of the parts of your roof. More From Doityourself.