A roof replacement or repair is a significant investment that impacts your home’s protection, value, and efficiency. Yet countless homeowners in Troy, MI fall victim to common roofing mistakes—some caused by oversight, others by working with the wrong contractor. These missteps can lead to leaks, structural issues, and wasted money.
Avoiding roofing mistakes starts with education and ends with choosing the right team. At
180 Contractors Roofing & Siding, we’ve seen firsthand how avoidable errors lead to long-term damage. Whether you’re installing a new roof or maintaining an existing one, here are the most common roofing mistakes—and how to steer clear of them.
Mistake 1: Choosing the Cheapest Estimate Over Quality
It’s tempting to choose the lowest bid, especially when roofing costs can seem overwhelming. But roofing is not a place to cut corners. Cheap bids often lead to:
- Inferior materials with shorter lifespans
- Poor workmanship from unlicensed or inexperienced crews
- Hidden costs added after the project starts
- Shortened warranties (or no warranty at all)
Instead of focusing only on price, evaluate:
- Contractor credentials and certifications
- Online reviews and local reputation
- Manufacturer partnerships (e.g., Owens Corning Preferred Contractor status)
In Troy, a roof must withstand ice, snow, high winds, and hot summers. Cutting corners now can cost you thousands later.
Mistake 2: Improper Ventilation and Insulation
Many homeowners—and some contractors—fail to consider how critical ventilation and insulation are to roof performance. Poor attic airflow can lead to:
- Ice dams in winter
- Mold and mildew growth
- Shingle deterioration from excess heat
- Decreased energy efficiency
A quality roofer will evaluate your attic’s ventilation and insulation during the project—not just lay shingles. Proper airflow extends the life of your roofing materials and reduces your energy bills.
Mistake 3: Re-Roofing Over Old Shingles
Installing new shingles over old ones (a practice called overlaying) might save time and labor, but it’s rarely a good idea. This shortcut can:
- Trap moisture between layers
- Hide underlying structural damage
- Void manufacturer warranties
- Lead to uneven surfaces and faster material breakdown
The correct way to replace a roof is to strip it down to the decking. This allows your roofer to:
- Inspect and repair any rot or soft spots
- Apply fresh underlayment and flashing
- Ensure proper installation of the new system
At 180 Contractors Roofing & Siding, we never recommend layering shingles—your roof deserves a clean start.
Mistake 4: Ignoring Flashing and Roof Valleys
Flashing protects the most vulnerable parts of your roof: valleys, chimneys, skylights, and vents. Improperly installed or neglected flashing is one of the top causes of leaks.
Common flashing errors include:
- Using caulk instead of metal flashing
- Leaving gaps between flashing and surfaces
- Installing it flat instead of layered correctly
A reputable roofer will use high-quality materials like aluminum or copper and apply flashing to industry standards. In a weather-heavy climate like Troy, MI, these small details make a big difference.
Mistake 5: Not Reading the Warranty Terms
Many homeowners don’t realize that improper installation or failure to register their roof can void a manufacturer’s warranty. It’s important to:
- Understand what’s covered (materials vs. labor)
- Know how long the coverage lasts
- Ensure the contractor registers your roof if required
- Keep documentation and receipts
Warranties are an essential part of your roof’s long-term protection. Make sure you’re working with a company that honors and explains them.
Mistake 6: Hiring Unqualified or Out-of-Town Roofers
Fly-by-night roofing companies often show up after storms, offering fast repairs at unbeatable prices. They may disappear as quickly as they arrive—leaving you with poor workmanship and no recourse if something goes wrong.
Instead, work with a local, established contractor who:
- Understands Troy building codes and weather conditions
- Has a permanent business address and insurance
- Provides referrals and reviews from local clients
180 Contractors Roofing & Siding has earned a solid reputation across Southeast Michigan. As a BBB A+ accredited, Guildmaster Award-winning, and Owens Corning Preferred Contractor, we’re here before, during, and after the job.
Mistake 7: Skipping Maintenance After Installation
Even the best roof will deteriorate if not properly maintained. Skipping routine inspections and cleanings allows small issues to worsen—leading to leaks, mold, or premature failure.
Smart homeowners schedule:
- Seasonal inspections, especially after storms
- Gutter cleaning and debris removal
- Attic checks for moisture or ventilation issues
Preventive maintenance is the easiest way to avoid costly repairs and extend your roof’s life.
Final Thoughts
Roofing mistakes are common—but avoidable. By understanding what to watch for and partnering with experienced professionals, you can protect your investment and your home.
In Troy, MI, 180 Contractors Roofing & Siding provides honest assessments, top-tier materials, and expert craftsmanship that help you avoid common pitfalls and enjoy a roof that performs for decades.
Read also our blog:
Five Reasons to Take Better Care of Your Roof
