
Applying asphalt roof shingles is a process that requires some preparation and patience, but with the right tools and knowledge, it's definitely doable.
First, make sure you have a solid understanding of the different types of asphalt shingles, including three-tab shingles, architectural shingles, and impact-resistant shingles. These types of shingles have varying lifespans, with three-tab shingles typically lasting around 20 years and architectural shingles lasting up to 30 years.
Before starting the installation process, it's essential to inspect the roof deck for any damage or rot. This will ensure a secure and even surface for the shingles.
Related reading: 3 Tab Shingle vs Architectural Shingle
Preparation
Before you start installing asphalt roof shingles, it's essential to prepare your roof properly. Measure your roof and buy the right number of shingles, as it generally takes three bundles to cover 100 square feet.
To determine how the shingles will lay on the roof width, measure the length of a shingle as it lies across the roof. Most asphalt shingles are 3 feet in length. If your roof's width is not an even multiple of the shingle's length, you'll have a partial piece on one end of each row.
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Remove old shingles and flashing carefully, starting from the peak farthest from the trash container. Use a garden fork or a roofing shovel to pull them off quickly, and protect the sides of the house and windows with a large piece of plywood.
Clean the roof by sweeping it as clean as possible, removing nails that didn't come up earlier, and reattaching loose boards in the sheathing. Examine the sheathing for damage and rotted boards, replacing the damaged sections.
Before installing underlayment and new flashing, lay asphalt, felt-paper, or special waterproof underlayment over the roof. Staple this felt down, starting at the lowest point of your roof and working upward, overlapping each row at least 3 inches.
Choose the kind of starter course you will use, such as narrow tab-less starter shingles or cutting your own starter shingles to fit the project. Use chalk lines to make a guide for yourself, marking a guideline beginning 7 inches from the bottom roof edge.
It's also essential to prepare for the installation day by checking the weather forecast and choosing a clear day. Attempting to install shingles in wet weather is asking for trouble, so delay the project if there's any possibility of rain.
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Roof Preparations
To start your asphalt roof shingle installation project, you'll need to prepare your roof. First, measure your roof and buy the right number of shingles, it generally takes three bundles to cover 100 square feet.
Before you begin, check the weather forecast and choose a clear day to avoid any delays due to rain. You should also consider the temperature, as installing shingles in extreme heat or cold can be uncomfortable and potentially hazardous.
To determine how the shingles will lay on your roof, measure the length of a shingle as it lies across the roof. Most asphalt shingles are 3 feet in length, so if your roof's width is not an even multiple of the shingle's length, you'll have a partial piece on one end of each row.
You'll also need to remove old shingles and flashing, starting from the peak farthest from the trash container or the corner you want to collect the shingles in. Use a garden fork or a roofing shovel to pull them off quickly, and protect the sides of the house and windows during this process.
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Once you've removed the old shingles, clean the roof by sweeping it as clean as possible and removing any nails that didn't come up earlier. Reattach any loose boards in the sheathing and examine it for damage or rot, replacing any damaged sections.
Before installing the new shingles, you'll need to install underlayment and new flashing. Lay asphalt, felt-paper, or special waterproof underlayment over the roof, overlapping each row at least 3 inches and using plenty of staples to avoid tearing the paper.
Here's a rough guide to the order of operations:
- Remove old shingles and flashing
- Clean the roof
- Install underlayment and new flashing
- Install starter course
- Install shingles
Safety and Warnings
Safety and warnings are crucial when it comes to applying asphalt roof shingles. If you're working on a steep roof, make sure to nail toe-steps to the roof with metal strips to keep you and your supplies in place, and use safety ropes and a harness.
Be aware of the slope of your roof - if it's above a 7/12 slope, use roof jacks and planks for safety.
On a similar theme: Slope Shed Roof
Hot weather can also be a hazard: avoid walking or standing on asphalt shingles during really hot weather, as it can cause damage to the shingles. Instead, work in the morning or early afternoon when the sun is not as intense.
Always wear a safety harness and line attached to your roof's ridge, and consider setting up a staging area with safety rails for added protection. You should also wear rubber-soled boots or shoes, gloves, and eye protection, and a hard hat is a good idea, especially if you're working with someone else.
A little planning can go a long way in ensuring a safe and successful shingle installation. Check the weather forecast and choose a clear day for the job, and avoid working in wet or icy conditions.
Here are some key safety tips to keep in mind:
- Nail toe-steps to the roof with metal strips on steep roofs.
- Use roof jacks and planks on roofs with a slope above 7/12.
- Avoid walking or standing on asphalt shingles in hot weather.
- Wear a safety harness and line attached to the roof's ridge.
- Wear rubber-soled boots or shoes, gloves, and eye protection.
Installation
Before you start installing your asphalt roof shingles, make sure to choose a clear day with no possibility of rain. Attempting to install shingles in wet weather is asking for trouble.
It's also a good idea to warn your neighbors ahead of time as a courtesy, since installing shingles is a noisy business. Consider having your pets spend installation day away from the house if possible.
Clear your front and back yards of anything that might get damaged by falling debris, including patio furniture, outdoor grills, and lawn decorations. This will save you from having to clean up a mess later.
Asphalt Installation Steps
Before you start installing asphalt shingles, make sure to choose a clear day with no rain in the forecast. Attempting to install shingles in wet weather is asking for trouble.
It's essential to prepare your roof before installing shingles. This includes removing old shingles and flashing, cleaning the roof, and reattaching loose boards in the sheathing. You should also examine the sheathing for damage and rotted boards, replacing the damaged sections.
To prepare the roof, you'll need to measure the length of a shingle as it lies across the roof. This will help determine how the shingles will lay on the roof width. Most asphalt shingles are 3 feet in length.
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You'll need to get the right number of shingles for the job. It generally takes three bundles of shingles to cover 100 square feet. Asphalt shingle "bundles" are actually sealed in packages.
Here's a step-by-step guide to preparing the roof:
- Get the right number of shingles for the job.
- Measure the length of a shingle as it lies across the roof.
- Remove old shingles and flashing.
- Clean the roof.
- Reattach loose boards in the sheathing.
- Examine the sheathing for damage and rotted boards, replacing the damaged sections.
Once you've prepared the roof, you can start installing the underlayment and new flashing. Lay asphalt, felt-paper, or special waterproof underlayment over the roof, overlapping each row at least 3 inches. Use plenty of staples and work carefully to avoid tearing the paper.
The first row of shingles, also known as the starter strip, should overhang the drip edge by about a half-inch. Make sure to measure the height of your shingles and mark a line on the underlayment where the top edge of the shingles needs to be to get the half-inch overlap.
The most frequently installed asphalt shingles today are architectural shingles, which are two-ply shingles that have more dimension. Most manufacturers also offer a line or two of luxury shingles, which are heavier and far more expensive.
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To install the first row of shingles, you'll need to:
- Measure the height of your shingles and mark a line on the underlayment.
- Trim your starter course to get the tar strip as close to the edge of the roof as possible.
- Install the starter strip, overlapping the drip edge by about a half-inch.
Once you've installed the first row of shingles, you can start installing the rest of the shingles. Use your chalk line to snap out a grid with six-inch horizontal spacing and five-inch vertical spacing. This will make it easy to nail down the rest of your shingles while ensuring you get the right amount of overlap and exposure.
The final step in installing asphalt shingles is to install the ridge cap shingles. This involves cutting the shingles into a piece long enough to overlap the top course on each side of the roof by five inches. The built-in tar strip should be oriented across the ridge for the ridge cap shingles, perpendicular to the direction it faces on the rest of the shingles.
Take a look at this: What Is a Roof Ridge Cap
Duration Series
The Duration Series shingles are a great choice for any roofing project. Each shingle has a SureNail fabric nailing zone that provides excellent gripping power to the sealant.
This design feature helps prevent nail pull-through resistance, which can be a common issue with other shingles.
The SureNail Technology is patented and exclusive to OwensCorning, so you can trust that you're getting a high-quality product.
Underlayment and Waterproofing
Underlayment is a crucial step in preparing your roof for shingles. It's a water-resistant barrier that goes over the roof decking to protect against water damage.
The most common materials used for underlayment are felt paper and synthetic underlayment made from fiberglass or polyester. Synthetic underlayment is lighter and tougher, making it easier to install and walk on without tearing.
To install underlayment, start by installing the underlayment strips, overlapping them by about half their width. Don't rush - this is a critical step that requires attention to detail.
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Step 4: Apply Underlayment
Applying underlayment is a crucial step in ensuring your roof is protected from water damage. This water-resistant barrier is installed over the roof decking to provide an extra layer of protection.
The most common materials used for underlayment are felt paper and synthetic underlayment made from fiberglass or polyester. Synthetic underlayment is lighter and tougher than felt paper, making it easier to install and walk on without accidentally tearing it.
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To apply underlayment, start by installing the underlayment strips, overlapping them by approximately half their width. Don't rush this process, as it's often the most time-consuming step for new roofers.
If you have a large roof, follow the instructions on the underlayment packaging for how to stagger the sections if one strip isn't long enough to cover the entire length of your roof. This ensures an even covering between your shingles and roof sheathing.
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Step 5: Waterproofing Valleys with Leak Barrier
Waterproofing valleys is crucial to prevent water from seeping under the shingles and into the roof decking. In areas where two roof planes meet, a special leak barrier is installed.
These areas include valleys, around penetrations, and on lower-slope roofs that water will take longer to run off. Self-adhesive membranes are good for providing additional protection in these areas.
Most major roofing brands sell their own version of leak barrier, and require it to be installed in the aforementioned areas for the roof to be protected by any contractor workmanship warranty that they offer.
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Shingle Installation
Shingle installation is a crucial step in applying asphalt roof shingles. The first row of shingles, also known as the starter strip, should overhang the drip edge by about a half-inch.
To ensure proper overlap, measure the height of your shingles and mark a line on the underlayment where the top edge of the shingles needs to be. This will help you get the half-inch overlap.
You'll probably have to trim your starter course to get the tar strip as close to the edge of the roof as possible. This is a common task, but it's essential to get it right.
The most common type of asphalt shingle is the architectural shingle, which is two-ply and has more dimension than the traditional three-tab shingle. These shingles come in a wide variety of colors and styles.
Asphalt shingles are relatively straightforward to install, but measuring and ensuring consistent overlap and stagger can be a bit tricky. Snapping a chalk grid can help make this process easier.
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Here's a summary of the basic steps for laying shingles:
- Size your shingles appropriately, cutting five variable sizes if using three-tab shingles.
- Lay a starting row at the bottom of the roof, placing nails in the shingles about 3/4 inch above the cutouts.
- Lay the first row of shingles directly covering the starter row, snapping a horizontal chalk line as a guide.
- Lay the second row of shingles, setting the first shingle back a half tab from the edge of the first shingle on the first row.
- Shingle around stacks, vents, and chimneys as necessary, protecting holes with aluminum sheeting.
- Interlace the flashing around the chimney with the rows of shingles, cementing sheet metal flashing aprons in place.
- Bring the ridge edges together with a ridge-capping layer, using special shingles or cutting regular shingles into 3-tabbed pieces.
Remember to always inspect your work and follow safety guidelines to avoid accidents.
Nailing and Fastening
Proper nailing techniques are essential for optimal performance of asphalt shingles. They relate to the quantity, location, and driving method of the roofing nails.
Each shingle manufacturer has its own requirements for proper nailing, including where roofing nails should be placed. You should follow those guidelines to ensure performance and holding power.
Roofing nails should be driven by hand with a hammer or with a properly adjusted pneumatic nail gun. Improperly adjusted nail guns can result in under penetration or over-penetration of the roofing nails.
Typically, roofing nails are placed no closer than 1 inch from the edge of the shingle according to the manufacturer's specifications. This is to prevent nail corrosion and sealing failures.
Roofing nails are designed to hold shingles down in questionable weather, like high winds and rain. Most people use 1–1/4–inch roofing nails for this purpose.
Here are some common issues that can arise from improper nailing:
- Nail corrosion
- Sealing failures
- Raised shingle tabs
- Buckling
- Shingle blow-offs
Drip Edge and Valleys
Water has a high surface tension, which means it tends to cling to your roof as it rolls down the peak. This is why drip edges are essential for preventing leaks and water damage.
You'll want to install the drip edge before installing the shingles, and it should sit on the fascia board. Leave a half-inch gap between the bottom of the drip edge's kicker and the fascia board.
Don't forget to apply drip edges to the gable ends as well, following the same procedure. This will ensure water doesn't seep into your home.
Allowing the first course of shingles to overhang the drip edge by about half an inch adds an extra buffer against water leaks. This helps prevent water from clinging to the underside of your eaves.
In areas where two roof planes meet, such as in a valley, a special leak barrier is installed to prevent water from seeping under the shingles and into the roof decking.
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Guidelines for Success
To ensure a successful shingle installation, follow these guidelines. Start by spreading the bundles of shingles out over the roof so work will flow continuously.
It's essential to work efficiently, especially when tackling a medium or large roof. Laying shingles is a time-consuming process, so consider enlisting the help of one or more partners to speed up the process.
To avoid damage to the shingles and felt-paper, avoid walking over or cutting them during the middle of the day on hot days. The heat can partially melt the materials, making them gooey and easier to damage.
When nailing shingles, use the correct roofing nail material, size, and grade as specified in the shingle installation instructions. This will ensure optimal performance of your asphalt roofing shingles.
Here are some key nailing guidelines to keep in mind:
By following these guidelines, you'll be well on your way to a successful shingle installation. Remember to take your time, work efficiently, and prioritize proper safety practices to ensure a job well done.
Frequently Asked Questions
What is the best adhesive for asphalt shingles?
For asphalt shingles, a good quality brand of asphalt plastic cement applied in small spots is recommended, as it adheres well without damaging the shingle coating. Use a small amount to avoid excess solvents that can cause blisters.
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