Replacing roof shingles may seem straightforward, but even small mistakes can lead to big problems—like leaks, structural damage, or voided warranties. Whether you’re a homeowner tackling a DIY job or hiring a contractor, understanding what not to do is just as important as knowing the right steps.
1. Skipping a Full Roof Inspection
Many homeowners focus only on visible damage, overlooking hidden issues like rot, water infiltration, or damaged flashing. A professional roof inspection before replacing shingles ensures you address the underlying problems, not just the surface.
2. Installing New Shingles Over Old Ones
While layering new shingles over existing ones can save time and money, it’s usually a bad idea. This method can:
Hide roof deck damage
Add unnecessary weight
Void manufacturer warranties
Best practice: Strip off old shingles first.
3. Ignoring Manufacturer Instructions
Each shingle brand has its own installation guidelines. Ignoring them can lead to poor sealing, improper spacing, or shingle blow-off during storms. Always follow the specific instructions for the product you’re using.
4. Using the Wrong Nails or Fasteners
Using the wrong type or length of nails can cause shingles to loosen or blow off. For asphalt shingles, galvanized roofing nails are recommended. Improper nail placement is also a common reason for roof failure.
5. Improper Flashing Installation
Flashing around chimneys, skylights, and valleys must be replaced or sealed correctly during a re-roofing job. Reusing old flashing or installing it incorrectly can lead to leaks and moisture damage.
6. Poor Ventilation Planning
A well-ventilated roof improves shingle lifespan and reduces moisture buildup. Improper ventilation can cause:
Ice damming in winter
Mold growth in attic spaces
Heat damage to shingles in summer
7. Shingle Misalignment
Crooked or uneven shingles not only look unprofessional but can lead to water infiltration and wind uplift. Always use a chalk line and align carefully with each row.
8. Neglecting Safety Precautions
Roofing can be dangerous without proper precautions:
Wear non-slip shoes
Use a roof harness
Never work alone on steep slopes
9. Hiring Unqualified Contractors
Choosing the cheapest contractor without checking reviews, licenses, or warranties can result in poor workmanship and costly repairs later. Always go with experienced, well-reviewed professionals.
10. Not Planning for Weather Conditions
Shingles need proper time to seal. Installing them during wet, cold, or windy conditions can affect bonding and lead to early failure. Check the weather forecast and follow ideal temperature guidelines.
✅ Final Thoughts: Do It Right the First Time
Replacing your roof shingles is a long-term investment. By avoiding these common mistakes, you’ll ensure your new roof performs optimally for years to come.
At Scaffs India, we provide comprehensive roof inspection and repair services. Our team will assess the damage and ensure your roof is in top condition. Learn more about our roof repair services.
Scaffs India is your go-to expert for premium roofing shingles in Kerala—combining aesthetics, performance, and protection for every project.We invite you to explore some of the beautiful roofing choices.For more information regarding how IKO Roofing shingles can be used for your roofing project, visit our
contact page link here and get in touch. or call +91 96455 55534.