Roof Repair Wall Flashing: What Not to Do

3. Notching Shingles Correctly

Improper notching of shingles can lead to a lot of water damage down the line. Notching refers to cutting shingles to allow the flashing to fit properly under the roofing material.

Why It’s a Problem:

• Water Runoff Issues: If shingles aren’t notched correctly, water may not flow off the roof properly and will collect behind the flashing.

• Leaks and Rot: Improper notches can result in water seeping into the walls or deck, leading to rot and further damage.

Solution:

• Always notch shingles in an L-shape to ensure that flashing can slide underneath them for proper water diversion.

• Avoid cutting shingles too short, and ensure proper overlap for maximum protection.

4. Folding Flashing Corners Instead of Using a Seamless Approach

Some installers fold the corners of flashing when they reach an edge, hoping this will seal the flashing. This technique often leads to holes that let water through.

Why It’s a Problem:

• Pinholes and Leaks: Folding creates a weak point in the flashing where water can easily penetrate.

• Inconsistent Seal: The seal will not be uniform, leaving gaps or weak spots in the flashing that may eventually leak.

Solution:

• Never fold flashing corners. Instead, use seamless flashing that continues the protective barrier without weak spots.

• If necessary, use a straight edge to trim the flashing and fit it properly.

Why Proper Flashing Is Essential for Your Roof’s Longevity

Proper flashing is key to maintaining your roof’s integrity. Even the best shingles won’t protect your home if the flashing is poorly installed. Flashing ensures that water flows correctly, preventing damage to the structure of your home.

The Risks of Ignoring Flashing Problems:

• Water Damage: Poor flashing allows water to seep into the roof structure, leading to mold, rot, and mildew.

• Expensive Repairs: Fixing a roof leak caused by improper flashing often involves tearing down parts of the roof, which can be expensive and time-consuming.

• Structural Damage: If left unaddressed, leaks from improper flashing can lead to structural issues in the home, such as foundation damage and weakening of the roof deck.

10 FAQs About Roof Wall Flashing

1. What is the main purpose of wall flashing?

• Flashing directs water away from the joints where the roof meets walls, chimneys, or dormers.

• It prevents water from infiltrating the interior of your home, safeguarding your structure from water damage.

• It helps prolong the life of your roofing materials and ensures your home stays dry.

2. Why is it important to extend flashing beyond the roof edge?

• This ensures that water doesn’t pool behind the flashing, which can lead to leaks.

• Water needs to flow freely over the flashing, so extending it beyond the edge allows proper drainage.

• An extended flashing also prevents water from trickling back under the shingles and causing damage.

3. How far should flashing extend beyond the roof’s edge?

• Flashing should extend at least an inch beyond the shingles to allow water to flow off properly.

• The exact measurement will depend on the roof’s slope, but it’s crucial that the flashing covers the joint thoroughly.

• Always measure to ensure there’s adequate overlap with the roofing materials.

4. Can I install flashing myself as a DIY project?

• While it’s possible, flashing installation requires a good understanding of roofing techniques.

• Mistakes like cutting flashing too short or improperly notching shingles can lead to leaks and costly repairs.

• It’s always best to consult a professional roofing contractor, especially for complex installations.

5. What are the signs that my flashing is improperly installed?

• Visible leaks or water stains inside the house near walls or ceilings.

• Roof areas that feel soft or spongy to the touch, indicating wood rot.

• Broken or missing shingles around the flashing areas.

6. How often should I inspect my roof flashing?

• Inspect flashing during your annual roof check-up, or after a storm with heavy rainfall.

• Pay attention to areas where the roof meets walls, chimneys, or dormers.

• If you notice leaks, it’s important to inspect the flashing immediately to prevent further damage.

7. What is the difference between step flashing and continuous flashing?

• Step flashing is used for areas where the roof meets a wall at an angle, overlapping the shingles.

• Continuous flashing is a single piece of flashing that runs the length of a roof joint, typically used along a flat roof.

• Both types serve to channel water away from vulnerable areas on the roof.

8. Can flashing be repaired if it’s damaged?

• Yes, damaged flashing can often be repaired by replacing small sections.

• However, if the flashing is old or the roof is nearing the end of its life, a full replacement may be necessary.

• Minor flashing repairs can be done quickly, but extensive damage may require a professional roofer’s help.

9. How does improper flashing contribute to roof leaks?

• Improperly installed flashing can allow water to seep behind shingles, damaging the roof deck and interior walls.

• Even small gaps or poorly folded flashing can create entry points for water.

• Over time, these issues accumulate and lead to expensive repairs and structural damage.

10. How long does flashing last?

• Flashing is made from durable materials like aluminum or copper, and it can last for decades if properly maintained.

• Regular inspections and repairs can extend the life of flashing and prevent water damage.

• However, flashing may need to be replaced if it’s severely corroded or damaged.

Conclusion: Flashing Is Key to a Leak-Free Roof

Properly installed wall flashing is an essential part of any roofing system. It ensures that water is diverted away from vulnerable areas, preventing leaks and structural damage. By avoiding common flashing mistakes like stopping it at the roof edge or cutting it too short, you can ensure your roof stays in top condition for years to come.

At Ernie’s Roofing, we’ve been providing reliable roofing services in Denver, CO, since 1978. If you have concerns about your roof flashing or need professional repairs, don’t hesitate to contact us at 720-346-ROOF or visit our website https://erniesroofing.com. We offer free estimates and are ready to help you keep your home dry and safe.