Double Duty Roof: Re-roofing Over Existing Shingles for a Budget-Friendly Fix

Fixing your roof over existing shingles is a common practice that can save time and money. This method, known as “re-roofing” or “overlay roofing,” involves adding a new layer of shingles over the existing ones. While this can be a cost-effective solution, it’s essential to follow proper steps to ensure the durability and effectiveness of the new roof. Here’s a comprehensive guide to help you fix your roof over existing shingles.

Benefits of Re-Roofing

Cost-Effective: Re-roofing eliminates the need to tear off the old shingles, reducing labor costs and disposal fees.

Time-Saving: Since you’re not removing the old roof, the project can be completed more quickly.

Environmental Impact: By not removing the old shingles, you reduce the amount of waste sent to landfills.

When to Consider Re-Roofing

Shingle Condition: The existing shingles should be in relatively good condition, lying flat and not heavily damaged.

Roof Structure: The roof deck and structure should be in good shape, without any rot or significant damage.

Number of Layers: Most building codes allow for only two layers of shingles. If your roof already has two layers, you’ll need to remove the existing shingles before adding new ones.

Step-by-Step Guide to Fixing Your Roof Over Existing Shingles

1. Inspect the Existing Roof

Before starting, thoroughly inspect the existing shingles and roof deck. Look for:

  • Leaks: Check for signs of leaks inside your home, such as water stains on the ceiling.
  • Damaged Shingles: Replace any broken or curled shingles to ensure a flat surface for the new layer.
  • Roof Deck Condition: Ensure the underlying roof deck is solid and free of rot.

2. Gather Materials and Tools

  • New Shingles: Choose shingles that match the existing ones or select a new style that you prefer.
  • Roofing Nails: Ensure you have enough nails to secure the new shingles.
  • Underlayment: Consider using an underlayment to provide an additional layer of protection.
  • Roofing Tools: Ladder, roofing hammer, utility knife, measuring tape, and chalk line.

3. Prepare the Roof Surface

  • Clean the Roof: Remove any debris, leaves, or dirt from the existing shingles.
  • Repair Any Minor Damage: Fix any small issues with the existing shingles to ensure a smooth surface.

4. Install the Underlayment (Optional)

Adding an underlayment over the existing shingles can provide extra protection against moisture. Roll out the underlayment and secure it with roofing nails, overlapping each row by about 4 inches.

5. Start Laying New Shingles

  • Begin at the Bottom: Start at the bottom edge of the roof and work your way up.
  • Align Shingles Properly: Align the first row of new shingles with the edge of the roof, using a chalk line for guidance.
  • Nail the Shingles: Secure each shingle with roofing nails, placing them just above the adhesive strip.
  • Overlap Each Row: Ensure each row of shingles overlaps the one below it, following the manufacturer’s instructions for proper overlap distance.

6. Trim and Fit Shingles Around Edges

  • Cut Shingles to Fit: Use a utility knife to trim shingles as needed for edges, corners, and around roof features like chimneys and vents.
  • Install Flashing: Replace or add flashing around roof penetrations to prevent leaks.

7. Inspect and Clean Up

  • Check Your Work: After installing the new shingles, inspect your work to ensure all shingles are properly aligned and secured.
  • Clean Up: Remove any debris, excess nails, and packaging materials from the roof and surrounding area.

Tips for a Successful Re-Roofing Project

  • Follow Manufacturer’s Guidelines: Always adhere to the shingle manufacturer’s installation instructions for the best results.
  • Ensure Proper Ventilation: Adequate roof ventilation is crucial to prevent moisture buildup and extend the life of your shingles.
  • Safety First: Use proper safety gear, such as a harness and non-slip shoes, and work with a partner when possible.

When to Call in the Professionals

While re-roofing can be a DIY project, it’s important to know when to seek professional help. If you’re unsure about the condition of your roof deck, dealing with a steep or complex roof, or simply want the assurance of a job done right, consider hiring experts.

Perfect Choice Exteriors is a reliable partner in roofing renovation, offering professional services to ensure your new roof is installed correctly and efficiently. Their experienced team can assess your roof’s condition, provide high-quality materials, and complete the project to the highest standards.

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