Be Aware – Common Roofing Mistakes

Even professional roofing crews can make errors if they’re not following best practices. Here are some of the most frequent roofing mistakes that can lead to costly repairs down the road:

1. Skipping or Reusing Old Step Flashing

Step flashing is essential for preventing leaks around areas where the roof meets walls, like chimneys and dormers. Some contractors cut corners by reusing old step flashing or failing to integrate new shingles properly. Over time, this can allow water to seep into your home, leading to rot and mold issues.

2. Misaligned or Poorly Staggered Shingles – Improper Installation Around Protrusions, eg: Vents

Shingles need to be offset properly from one row to the next. If they are laid out in a uniform pattern without enough stagger, it creates weak spots where water can easily penetrate. This mistake reduces the roof’s ability to shed water properly, leading to premature leaks.

3. Incorrect Nailing Techniques

Shingles must be nailed down securely using the correct number of nails, properly placed. Some common nailing errors include:

• Too few nails – This leaves shingles vulnerable to wind uplift.
• Overdriven nails – This can damage the shingles, making them prone to tearing.
• Crooked nails – These don’t hold the shingles properly and can cause them to loosen over time.

Proper nailing is one of the simplest yet most critical steps in roof installation.

4. Poorly Cut Shingles Around Roof Vents

Shingles must be precisely cut to fit around roof vents and other protrusions. Sloppy cutting leaves gaps that can lead to leaks. A professional roofer will take the time to ensure a snug, secure fit around all vents and pipes with no seams behind the vents.

5. Missing or Improper Drip Edge Installation

The drip edge is a small but vital component that directs water away from the roof and into the gutters. Without it, water can seep under the shingles, leading to rot and structural damage along the eaves. Unfortunately, some contractors skip this step entirely to save time and materials.

6. Lack of Plumbing Vent Boots

Plumbing vent pipes need rubber boots to create a watertight seal where they pass through the roof. Without them, water can slowly seep into your attic over time, causing damage that may not be noticeable until it becomes a serious issue. Properly installed vent boots help ensure your roof remains leak-free.

Protecting Your Investment

A new roof is one of the most significant upgrades you can make to your home, but only if it’s installed correctly. Avoiding these common mistakes can mean the difference between a durable, long-lasting roof and one that needs expensive repairs in just a few years.

What Can You Do?

1. Hire a reputable contractor – Look for a company with strong reviews, proper licensing, and warranties on their work.
2. Ask questions – A good contractor will explain their process and the materials they use.
3. Request a detailed contract – Ensure everything from step flashing to drip edge installation is explicitly included.
4. Inspect the work – If possible, check in during installation or have a trusted inspector verify the work.

By taking these precautions, you can ensure that your new roof will protect your home for decades to come. Don’t let mistakes be hidden in plain sight—be informed, ask the right questions, and choose the best professionals for the job!