Metal Roof Repair Made Easy
Fixing common metal roofing mistakes doesn’t have to be complicated. With the right help, it’s easier than you think! At KTM Roofing, we specialize in metal roof repair that’s simple and effective, helping you tackle problems caused by poor installation or maintenance.
In this article, we’ll walk you through the 10 most common issues homeowners and businesses face with metal roofs and how to fix or avoid them altogether. Protect your property, save money on big repairs, and keep your roof going strong for years to come!
Metal Roof 101: Uses & Benefits
Before diving into these metal roofing mistakes, let’s understand what makes metal roofing special. Metal roofing originated as a practical solution for commercial buildings but has become increasingly popular for residential properties in Atlanta Metro and nationwide. These systems offer superior durability, energy efficiency, and weather resistance compared to traditional materials. In Atlanta’s humid climate with frequent storms, metal roofing provides excellent protection against heat, wind, and moisture when properly installed.
Types of Metal Roofs
Different metal roofing systems offer various benefits:
- Standing Seam Metal Roof: Premium residential and commercial applications with superior weather resistance
- Metal Shingles: Residential installations mimicking traditional roofing materials
- Corrugated Panels: Agricultural and industrial buildings requiring cost-effective solutions
- Metal Tiles: High-end residential applications combining aesthetics with durability
The Importance of Proper Metal Roofing Installation
While metal roofing offers many advantages, the key to unlocking its full potential lies in proper installation. Even the most durable and efficient metal roofing system can fall short of expectations if not installed correctly. These issues typically result from inexperienced contractors or cutting corners to save costs, both of which can lead to costly repairs down the road.
Let’s examine those 10 most common metal roofing mistakes to help you recognize and avoid potential pitfalls:
1. Oil Canning and Panel Distortion
One of the easiest to see common metal roofing mistakes is oil canning, which causes a wavy appearance to develop in flat metal roofing panels. This aesthetic issue occurs when:
- Panels are manufactured with inconsistent thickness
- Installation doesn’t account for thermal expansion
- Insufficient backing support is provided during installation
While oil canning doesn’t affect structural performance, it can be unsightly and may indicate other installation problems.
Fix It: Replace affected panels with properly manufactured ones or install additional backing support.
Prevent It: Use high-quality materials, ensure adequate panel thickness, and account for thermal movement during installation.
2. Improper Fastening Systems
Incorrect fastener selection and placement represent a critical metal roofing mistake that can lead to system failure. Roofing contractors must use compatible fasteners designed specifically for metal roofing applications:
- Over-driven fasteners that crush gaskets
- Under-driven fasteners that allow water infiltration
- Wrong fastener materials that cause corrosion
- Inadequate fastener spacing that compromises wind resistance
Fix It: Replace incorrect or damaged fasteners and reseal where necessary to prevent leaks.
Prevent It: Use fasteners explicitly designed for metal roofing, follow manufacturer guidelines for placement and spacing, and avoid overdriving or under driving fasteners.
3. Inadequate Thermal Movement Planning
Metal roofing expands and contracts significantly with temperature changes. Atlanta’s climate, with temperature swings from freezing to over 100°F, makes proper thermal planning essential. Common mistakes include:
- Rigid fastening systems that don’t allow movement
- Insufficient expansion joints in large roof areas
- Improper clip selection for metal standing seam systems
- Failure to account for differential movement between materials
Fix It: Retrofit expansion joints or replace rigid fasteners with flexible ones to accommodate thermal movement.
Prevent It: Plan for thermal expansion by using appropriate fasteners, ensuring proper clip selection, and incorporating expansion joints based on roof size and material type.
4. Poor Flashing Installation
Flashing failures represent some of the most costly common metal roofing mistakes. These thin metal strips seal critical areas around:
- Chimneys and penetrations
- Roof valleys and intersections
- Skylights and vents
- Wall-to-roof transitions
When roofing contractors install flashing incorrectly or use incompatible materials, water infiltration becomes inevitable.
Fix It: Replace improperly installed flashing and reseal affected areas to stop leaks.
Prevent It: Ensure flashing is installed according to manufacturer specifications, use compatible materials, and inspect all flashing during and after installation.
5. Incorrect Slope and Drainage Design
Metal roofing systems require a proper slope for effective water drainage. Mistakes in this area include:
- Insufficient slope causing water pooling
- Improper valley design that creates bottlenecks
- Inadequate gutter sizing for the roof area
- Poor drain placement on flat or low-slope systems
Fix It: Redesign drainage systems, adjust roof slope, or install additional gutters and downspouts.
Prevent It: During the design phase, ensure the roof slope and drainage systems meet local building codes and are appropriate for metal roofing.
6. Ventilation System Failures
Proper ventilation prevents moisture buildup and reduces energy costs. Common metal roofing mistakes in ventilation include:
- Inadequate intake and exhaust balance
- Blocked or poorly positioned vents
- Mixing different ventilation types
- Insufficient ventilation for the roof size
Fix It: Clear blocked vents or add additional intake and exhaust vents as needed.
Prevent It: Design and install ventilation systems that provide balanced airflow and match the size and design of the roof.
7. Incompatible or Substandard Material Combinations
Using dissimilar metals in contact can cause galvanic corrosion. Roofing contractors must avoid:
- Steel fasteners with aluminum panels
- Copper and steel in direct contact
- Uncoated steel with other metals
- Improper sealant selection for metal types
Additionally, using substandard materials or overlooking essential steps during assembly can compromise the roof’s ability to withstand Atlanta’s challenging weather conditions.
Fix It: Replace incompatible materials or apply protective coatings to prevent corrosion.
Prevent It: Use materials that are compatible with one another and approved for metal roofing systems. Always follow manufacturer recommendations for sealants and fasteners.
8. Substrate and Underlayment Problems
The foundation beneath metal roofing must be properly prepared. Common substrate mistakes include:
- Inadequate decking support for the panel spanning
- Wrong underlayment selection for the climate
- Insufficient moisture barriers
- Poor deck ventilation design
Fix It: Reinforce decking, replace underlayment with a proper climate-specific product, and add moisture barriers where necessary.
Prevent It: Ensure the substrate and underlayment are designed to support the specific metal roofing system and local climate conditions.
9. Installation During Improper Weather Conditions
Weather during installation affects metal roofing performance. Mistakes include:
- Installing in high winds that affect panel alignment
- Working in the rain, compromising sealants
- Installation in extreme temperatures affects expansion
- Rushing installation due to weather pressure
Fix It: Inspect and repair areas compromised by poor weather conditions, including resealing affected joints.
Prevent It: Schedule installations only during stable weather, and avoid working in conditions that can impact material performance or alignment.
10. Lack of Manufacturer Specification Compliance
Perhaps the most critical common metal roofing mistakes involve ignoring manufacturer guidelines:
- Deviation from specified fastener patterns
- Using non-approved sealants or accessories
- Improper panel overlap requirements
- Failure to follow warranty requirements
Fix It: Correct installation to align with manufacturer specifications, replacing or repairing non-compliant areas.
Prevent It: Always follow the manufacturer’s installation instructions and use approved materials and techniques to ensure warranty compliance.
How To Find A Reputable & Knowledgeable Roofing Company
To ensure your metal roof delivers its promised durability and efficiency, it’s vital to partner with an experienced roofing company that understands the nuances of metal roof installation. Proper preparation and attention to detail can prevent these 10 common metal roofing mistakes, leaving you with a roofing system that lasts for decades.
For new installs or to repair damage already done, look for experienced roofing contractors in your area who are highly knowledgeable in metal roofing systems. They should:
- Specialize in metal roofing installations
- Provide manufacturer certifications
- Offer comprehensive warranties
- Have extensive local experience
- Use proper tools and safety equipment
Partner with Atlanta’s Top Metal Roofing Contractor: KTM Roofing
Don’t let common metal roofing mistakes compromise your investment. KTM Roofing brings decades of metal roofing expertise to the Atlanta Metro area, ensuring your metal roof repair or metal roof replacement is done right the first time. Our certified team understands local climate challenges and uses only the highest-quality materials and proven installation techniques.
Ready to protect your property with professional metal roofing services? Contact KTM Roofing today for a comprehensive consultation and discover why Atlanta area property owners trust us for all their metal roofing needs.
