How To Replace Asphalt Shingles?

Asphalt shingles are a popular roofing material due to their affordability and ease of installation. However, they may need to be replaced over time due to damage from weather, wear and tear, or other factors. In this article, we will go over the steps to replace asphalt shingles.

Materials Needed:

  • Replacement shingles
  • Pry bar
  • Hammer
  • Roofing nails
  • Utility knife
  • Roofing cement
  • Caulking gun

Step 1: Prepare the Roof for Replacement

Before replacing shingles, it is essential to prepare the roof for repair. This involves removing any loose debris, such as leaves, branches, or other debris on the roof. It is also essential to ensure the roof is dry and free from moisture, as this can affect the effectiveness of the new shingles.

Step 2: Remove the Damaged Shingles

To remove the damaged shingles, use a pry bar and hammer to loosen them gently. Starting at the top of the damaged area, slide the pry bar under the shingles and lift them. Use the hammer to remove the roofing nails holding the shingles in place gently.

Step 3: Install the New Shingles

Once the damaged shingles have been removed, you can start installing the new shingles. It is essential to start at the bottom of the damaged area and work your way up so that each new shingle overlaps the previous one. This helps prevent water from seeping in between the shingles.

To install the new shingles, slide the bottom edge of the new shingle under the shingle above it and align it with the rest of the row. Use roofing nails to secure the shingle in place, making sure to drive the nails through the nail line marked on the shingle.

Step 4: Cut Shingles to Fit

In some cases, you may need to cut the shingles to fit the shape of the roof. This can be done using a utility knife or a pair of tin snips. Ensure to carefully measure and cut the shingle to fit snugly against the other shingles and provide a watertight seal.

Step 5: Seal the Shingles

Once the new shingles have been installed, they must be sealed to ensure a watertight seal. Use roofing cement and a caulking gun to seal any gaps between the shingles and around any vents, chimneys, or other openings in the roof.

Step 6: Inspect and Clean Up

After the new shingles have been installed and sealed, it is essential to inspect the roof for any other damage or areas that may need repair. It is also essential to clean up any debris or materials that may have been left behind during the repair process.

Frequently Asked Questions 

Q: How do I know if my asphalt shingles need to be replaced?

A: There are several signs that your asphalt shingles may need to be replaced, including cracked, curled, or missing shingles, water stains on your ceiling, or excessive granule loss from the shingles. If you notice any of these signs, it is best to have a professional roofing contractor inspect your roof and recommend a course of action.

Q: Can I replace asphalt shingles or hire a professional?

A: While it is possible to replace asphalt shingles yourself, hiring a professional roofing contractor is generally recommended. Replacing shingles can be dangerous and requires specialized tools and knowledge of roofing techniques. A professional contractor can ensure that the job is done safely and correctly.

Q: How long does it take to replace asphalt shingles?

A: The time it takes to replace asphalt shingles can vary depending on the size of the damaged area and the complexity of the repair. Generally, a minor repair can be completed in a few hours, while a larger repair may take a full day or more.

Q: How much does it cost to replace asphalt shingles?

A: The cost of replacing asphalt shingles can vary depending on several factors, including the size of the repair area, the type of shingles being used, and the labor cost in your area. On average, you can expect to pay between $100 and $200 per square (100 square feet) roof area for a basic asphalt shingle repair.

Q: Can I install new shingles over old ones?

A: It is possible to install new shingles over old ones, but it is generally not recommended. Installing new shingles over old ones can create an uneven surface and may affect the performance of the new shingles. Any underlying damage to the roof decking may go unnoticed and cause further problems. It is always best to remove the old shingles before installing new ones.

Q: How long do asphalt shingles typically last?

A: The lifetime of asphalt shingles can vary based on several factors, including the quality of the shingles, the climate in your area, and how well the roof is maintained. On average, asphalt shingles can last between 15 and 25 years, but some higher-quality shingles can last up to 30 years or more.

Q: What are the most common causes of damage to asphalt shingles?

A: The most common causes of damage to asphalt shingles include high winds, hail, heavy rain, snow and ice accumulation, and exposure to UV rays. Poor installation or maintenance can also lead to premature wear and tear on the shingles.

Q: How do I choose the asphalt shingles for my roof?

A: When choosing asphalt shingles, it is essential to consider factors such as the climate in your area, the slope of your roof, and the architectural style of your home. Additionally, it would be best to choose shingles designed to withstand specific weather conditions in your area, such as high winds or heavy snow.


Replacing asphalt shingles is a straightforward process that can be done with the right tools and materials. By following these steps, you can ensure that your roof stays in good condition and provides long-lasting protection for your home. It is always best to consult a professional roofing contractor if you need clarification on any replacement process.