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Metal roofing represents a premier choice for property owners seeking exceptional longevity and durability. Unlike traditional materials that may only last around 20 years, metal is a smart option for roof replacement in Oregon, known for being energy-efficient, environmentally-friendly, and capable of lasting for decades. In fact, depending on the system chosen, a metal roof can last anywhere from 40 to 70 years. Many commercial buildings with pitched roofs rely on metal roofing, specifically the standing seam variety, because of its longevity, beauty, and low maintenance. It performs excellently in all weather conditions and is highly resistant to fire.
However, even the most durable materials are not impervious to failure. When a metal roof begins to leak, the cause is rarely the material itself but rather a failure in the installation, the fasteners, or a breach caused by extreme environmental forces. Because a metal roof is designed to last for decades, a leak is often a critical sign that maintenance is required immediately to preserve the home’s integrity.
When a property owner notices water damage to their ceiling or walls, or even if they spot blown off shingles (in mixed material structures), they immediately think about the subsequent repair or replacement. The key to solving a metal roof leak is not only identifying the visible point of water entry but understanding the technical failure behind it.
The Anatomy of a Metal Roof System and Its Vulnerabilities
Metal roofing systems are broadly categorized into two main types based on how they are fastened and sealed: exposed fastener and hidden fastener (standing seam) systems. Each type comes with its own specific vulnerabilities that can lead to leaks over time.
1. Exposed Fastener Systems: The Common Maintenance Hurdle
The exposed fastener metal roofing system is often referred to as “barn style”. It is the more economical option. This system uses three-foot-wide metal sheets that overlap at the raised ends, known as “ribs”.
The primary vulnerability of this system lies directly in its name: the fasteners (screws) are exposed to the elements. While an exposed fastener roof can still last over 50 years, it requires more maintenance. Each screw holding the panels in place requires a rubber grommet to seal the puncture point against water infiltration. Over time, exposure to intense UV rays and temperature fluctuations causes these rubber grommets to eventually wear out and must be replaced.
Therefore, one of the most common causes of leaks in exposed fastener systems is misaligned screws or the simple failure of the rubber grommets. As the grommets fail, water seeps through the screw hole, often traveling along the roof decking before manifesting as a leak inside the structure.
2. Hidden Fastener Systems (Standing Seam): Seam Failure
Hidden fastener metal roofing, or standing seam metal roofing, is the premium option. It is more costly but is virtually maintenance-free. This system is available in narrower sheets (12, 16, or 20 inches wide).
Instead of relying on exposed screws and grommets, these panels are connected by mechanically seaming or crimping the end seams together. There is also a “snap-lock” version of standing seam metal roofing which does not require crimping and simply uses friction to snap the panels together. Below the seams, the panels are attached to the roof deck with screws, but these are not visible.
For these systems, leaks typically occur due to seam failure. If the mechanical seaming or crimping was improperly done during installation, or if the roof suffers extreme thermal movement or deflection over time, the seams can separate, creating a direct path for water.
Common Causes of Metal Roof Leaks That Require Expert Repair
Beyond the expected maintenance failure of fasteners or seams, there are four key causes of metal roof leaks that Deschutes Roofing is equipped to address:
1. Misaligned Screws
As noted, this is primarily an issue with exposed fastener systems. If the initial screws were not driven straight, were over-tightened (crushing the grommet), or were under-tightened, the seal integrity is immediately compromised. Even if the installation was perfect, the eventual wearing out of the rubber grommets on each screw means they must be replaced to prevent leaks.
2. Damaged Panels
Metal panels are exceptionally durable, but they can be damaged. During installation, panels can be bent, dented, or improperly cut. Over the decades, panels can become damaged by high winds, falling tree limbs (especially in areas with heavily wooded surroundings like Eugene, Oregon), or other impacts. A professional inspection is often needed to detect subtle panel damage that compromises the water shedding capability of the system.
3. Rust
While metal roofing is designed to be highly resistant to corrosion, rust can still be an issue, especially in cut edges, areas where coatings are scratched, or in the presence of dissimilar metals. The rust compromises the structural integrity of the sheet, eventually leading to pinhole leaks or larger failure points. Repairing rust damage requires specialized knowledge, often involving coating application or panel replacement, depending on the severity.
4. Storm-Related Punctures
Storms often trigger the need for roof repair. High winds can lift unsecured edges, and hail or flying debris can cause storm-related punctures. It is highly recommended to have a professional roof inspection after a wind or hail storm, as storm damage might not cause an immediate leak but can lead to significant problems down the line. Early inspection can prevent costly interior repairs.
Professional Repair: Finding the Hidden Source of Water
When a leak occurs, the subsequent water damage on the ceiling or walls may appear far away from the actual point of entry on the roof due to the way water travels along the metal panels or underlying materials. DIY roof repair simply isn’t enough to address the unique challenges of detecting and fixing metal roof leaks.
Deschutes Roofing is equipped to handle these complexities, ensuring we not only address the known issues but also prevent potential future problems.
Step 1: Meticulous, Comprehensive Inspection
Our process begins with a meticulous inspection of your roof to identify any known damage. Deschutes Roofing takes a thorough approach to roof repairs. We evaluate the entire roof, inside and out. We do full roof inspections with an included written report. We also include a free roof inspection with a verbal report on every replacement or repairs estimate visit.
Crucially, to find the true source of a leak, we utilize an infrared camera and inspect your roof both inside and out. This advanced technique allows our experts to pinpoint moisture infiltration pathways that would be invisible to the naked eye. Our goal is to provide a repair guaranteed to stop the leak.
Step 2: Addressing and Fixing Underlying Systemic Failures
A metal roof leak is often exacerbated or caused by failure in related systems, particularly in environments susceptible to harsh weather. We are equipped to handle roof damage resulting from harsh winter conditions, including heavy snow accumulation and ice dams.
- Ice Dams: Ice dams can cause serious damage to both your roof and gutters. Water can back up under the roofing material and actively run into the house. Deschutes Roofing offers specialized winter-related emergency services, including snow removal, ice and snow dam removal, and repair. One customer was desperate for help with ice dams, where water was actively running into the house, and we got a crew together for them the next day.
- Gutters: Leaking or poorly installed gutters can lead to many problems, extending from the roof down to the home’s foundation. Proper drainage is vital for a metal roof. We handle minor roof and gutter repairs.
- Ventilation and Insulation: When you call us for a roof inspection, we will also evaluate your attic insulation and ventilation as part of our inspection. This is critical because poor insulation and ventilation can contribute to temperature variations that lead to moisture issues and the formation of ice dams.
Step 3: Correcting Common Installation Defects
Sometimes, the leak is not due to age or weather but due to mistakes made by the original contractor. Deschutes Roofing’s experienced team can assess and repair defects from original roof installations. One customer noted that they experienced winter damage due to heavy snow, and an inspection of their roof revealed defects when installed by original roofer.
Choosing Professional Expertise for Metal Roof Longevity
Metal roofing is a significant investment, and its durability means that professional repair should only be conducted by highly trained experts. We offer our full range of services to both homeowners and business owners. We have a highly trained team of steep-slope and flat roofing experts.
Our commitment to quality extends through our entire process:
- Efficiency and Reliability: We can replace most roofs in just one day, minimizing disruption to your life. Our crews have been praised for being very professional, prompt, and completing work quickly and efficiently.
- Warranties and Credentials: We are a fully licensed roofing contractor, insured, and bonded for your protection. We offer competitive assurances, including a 30-year labor warranty with a 50-year product warranty.
- Customer-Focused Service: As a family- and veteran-owned and -operated roofing contractor, our mission is: “We pledge to treat every customer like family and their home like our own”.
If your metal roof is leaking or exhibiting signs of potential failure, don’t rely on inadequate DIY fixes. Early inspection can prevent costly interior repairs. Trust Deschutes Roofing, a certified roofer, to provide expert repair services for metal roofs. We proudly serve a wide range of areas across Oregon, working from five offices, including Bend, Beaverton, Lake Oswego, Portland, and Eugene.
Call us today at (541) 241-5720 or fill out our contact form to schedule your appointment and get a rree rstimate.