By: KO Roofing 7 minutes read

Your roof is your first line of defense against the elements, and it’s crucial to ensure it remains in good condition. One often-overlooked aspect of roof maintenance is the flashing.

Roof flashing plays a critical role in keeping your home watertight by preventing water from seeping into vulnerable areas. In today’s blog post, we will break down:

What roof flashing is
How to identify signs of damaged flashing
Methods for repairing it
The pros and cons of DIY repair versus hiring professionals
The cost associated with replacing your roof flashing

Keep reading to become an expert on all things related to roof flashing repair!

What is Roof Flashing?

Roof flashing is a weatherproofing component designed to seal and protect vulnerable areas of your roof where water may seep in. These areas include roof intersections, joints, valleys, chimneys, skylights, and vent pipes. Flashing is typically made from materials such as aluminum, galvanized steel, copper, or even rubber in some cases, and its primary purpose is to divert rainwater away from these vulnerable spots.

Signs of Damaged Roof Flashing

Like any other part of your roof, flashing can deteriorate over time, leading to potential leaks and water damage. Recognizing the signs of damaged roof flashing early can save you from costly repairs in the long run. Here are some common indicators that your roof flashing may need attention:

Visible Corrosion: If you notice rust or corrosion on your flashing, it’s a clear sign that it’s time for inspection and possibly replacement. Rust can weaken the flashing and compromise its effectiveness.
Cracks or Gaps: Check for any visible cracks, gaps, or openings in the flashing. Even small fissures can allow water to infiltrate, leading to leaks.
Missing or Loose Flashing: Sometimes, flashing may become dislodged or go missing due to wind, storms, or wear and tear. Missing or loose flashing needs immediate attention to prevent water infiltration.
Water Stains on Ceilings or Walls: If you spot water stains on your interior ceilings or walls, this could be an indication of a roof leak caused by damaged flashing.
Roof Shingle Damage: Damage to nearby roof shingles, such as curling, buckling, or missing shingles, can also be linked to compromised flashing. Inspect both the flashing and surrounding shingles.
Mold or Mildew Growth: If you notice mold or mildew growth in your attic or on the underside of your roof, it may be due to moisture entering through damaged flashing.

How to Repair Roof Flashing

Repairing damaged roof flashing is crucial to maintain the integrity of your roof and prevent further damage. Depending on the extent of the damage and your level of expertise, you can choose between DIY repair and hiring a professional. Here are the steps for both options:

DIY Roof Flashing Repair:

Fixing your roof flashing on your own? Here are some steps to follow.

1) Safety First:

Before starting any repair, ensure your safety by using proper safety gear, including gloves, safety goggles, and a stable ladder.

2) Identify the Damaged Area:

Locate the specific area of the damaged flashing. Clean away any debris or dirt to get a clear view of the problem.

3) Remove Old Sealant:

Carefully remove the old sealant or caulk around the damaged flashing using a putty knife or similar tool.

4) Replace or Patch:

Depending on the extent of damage, you can choose to either patch the flashing with a compatible material or replace it entirely. Use appropriate materials such as roofing cement, roofing nails, or screws.

5) Apply New Sealant:

Apply a generous amount of roofing sealant or caulk around the repaired or replaced flashing to create a watertight seal.

6) Check the Surrounding Area:

Inspect the nearby roofing materials and shingles for any damage, and repair or replace them as needed.

Professional Roof Flashing Repair:

When a professional roofer comes to your home to replace roof flashing, these are the steps they will follow:

1) Consultation:

Contact a reputable roofing contractor to assess the damage and provide a professional evaluation of the required repairs.

2) Schedule the Repair:

If necessary, schedule a time for the repair work to be completed by the roofing professionals.

3) Expert Repairs:

Trained professionals will conduct the necessary repairs, ensuring the flashing is correctly replaced or patched, and the surrounding area is inspected and addressed if needed.

4) Warranty:

Professional repairs often come with warranties, giving you peace of mind that the work is guaranteed.

Pros and Cons of DIY Repair vs. Professional

When it comes to repairing your roof flashing, you have the option to tackle the project yourself or hire a professional. Each approach has its advantages and disadvantages:

DIY Roof Flashing Repair:

✅ Pros:

Cost-Effective: DIY repairs can save you money on labor costs.
Immediate Action: You can address minor issues promptly without waiting for a professional’s availability.
Sense of Accomplishment: Completing a successful DIY repair can be satisfying.

❌ Cons:

Limited Expertise: DIYers may lack the skills and experience required for complex repairs.
Risk of Mistakes: Incorrect repairs can lead to more significant issues and costlier repairs.
Safety Concerns: Working on a roof can be dangerous without proper safety precautions and equipment.

Professional Roof Flashing Repair:

✅ Pros:

Expertise: Roofing professionals have the experience and knowledge to diagnose and fix issues correctly.
Quality Work: Professionals ensure that repairs are done to industry standards and with high-quality materials.
Warranty: Repairs often come with warranties, offering protection and peace of mind.
Safety: Professionals are trained to work safely at heights.

❌ Cons:

Cost: Hiring a professional can be more expensive than a DIY approach.
Scheduling: You may have to wait for an available appointment, especially during busy seasons.

The Cost to Replace Your Roof Flashing

The cost of replacing roof flashing can vary widely depending on several factors, including the extent of the damage, the type of flashing material used, and whether you choose to DIY or hire a professional. Here’s a rough estimate to give you an idea of what to expect:

DIY Roof Flashing Replacement:

Materials cost: $10 – $50 per linear foot, depending on the type of flashing material.
Tools and equipment: $20 – $100, depending on what you already have.
Total DIY cost: $30 – $150 per linear foot on average.

Professional Roof Flashing Replacement:

Labor cost: Roofing contractors typically charge between $200 – $500 per linear foot for flashing replacement.
Material cost: Similar to DIY, materials may cost between $10 – $50 per linear foot.
Total professional cost: $210 – $550 per linear foot on average.

Keep in mind that these costs are estimates, and the actual price may vary depending on your location, the complexity of the repair, and other factors. It’s always a good idea to obtain multiple quotes from reputable roofing contractors to get a more accurate estimate for your specific situation.

Get Your Roof Flashing Materials Replaced Properly!

Maintaining the integrity of your roof flashing is essential to protect your home from water damage and leaks. Regular inspections and timely repairs can extend the lifespan of your roof and save you from costly repairs down the road. Whether you choose the DIY route or opt for professional help, the key is to address damaged roof flashing promptly to ensure the safety and durability of your roof. Weigh the pros and cons of each approach and consider your skill level and budget when deciding how to tackle this important aspect of roof maintenance.Contact KO Roofing today to learn about our roof flashing repair services!