How to Stop Metal Roof Leaks

How to Stop Metal Roof Leaks

You're asking: How can I stop leaks in my commercial metal roof?

Stopping leaks in a commercial metal roof usually involves finding and sealing the exact spots where water is getting in. For a long-term fix, a metal roof coating system can waterproof the entire surface, covering common leak points before they become a problem.

Symptom

You might see water stains on your ceiling, dripping water inside your building, or moisture pooling on floors. Sometimes, you'll notice rust spots, loose fasteners, or seams lifting on the roof itself. These are all signs your metal roof is leaking.

Problem

Metal roofs can leak for a few common reasons. Over time, fasteners can back out or lose their seals, creating tiny holes. The seams where metal panels meet can also separate or lift, especially with thermal expansion and contraction. Older roofs might show rust and corrosion, which can eat through the metal. Poor installation can cause problems from day one. When these leaks go unchecked, water gets into your building, damaging insulation, products, and equipment. It can also lead to mold, higher energy bills from wet insulation, and structural damage to the roof deck if left long enough. Ignoring leaks costs more in the long run than fixing them.

Solution

Stopping metal roof leaks depends on the roof's condition. Here’s how we typically approach it:

1. Inspection and Cleaning: First, a Conklin-trained contractor will inspect your roof to find all leak sources. We look for loose fasteners, open seams, damaged flashing, and areas of corrosion. The roof then gets a thorough cleaning to remove dirt, rust, and debris, ensuring proper adhesion for any repairs or coatings.
2. Repairing Fasteners and Seams: We tighten or replace loose fasteners and seal them with specialized elastomeric caulking. For seams that are pulling apart, we apply a fabric reinforcement embedded in a base coat, effectively "stitching" the seams together and making them watertight. This step is crucial because fasteners and seams are the most common leak points on metal roofs.
3. Addressing Rust and Penetrations: Any rust spots are cleaned and treated to prevent further corrosion. Around roof penetrations like pipes, vents, and skylights, we apply specific flashing details using reinforced coatings to create a seamless, waterproof seal.
4. Applying a Conklin Metal Roof Coating System: Once all active leaks and weak points are repaired, we apply a complete Conklin metal roof coating system. This usually involves a rust-inhibiting primer, followed by one or more layers of reflective acrylic top coat. The coating creates a monolithic (seamless) membrane over the entire metal surface, sealing every fastener, seam, and penetration. This makes the roof waterproof and protects it from future rust and weathering.

Important Limits: We can’t coat a roof that has severely deteriorated metal, a failed or rotting deck, or widespread wet insulation. If a large portion of your roof insulation is saturated, it needs to be removed and replaced first. Our systems work best on metal roofs that are structurally sound but are showing signs of age, wear, or minor leaks.

Frequently Asked Questions

What makes metal roofs leak even though they're durable?

Metal roofs are tough, but their weakest points are the fasteners and seams. Over time, the constant expansion and contraction from temperature changes can loosen fasteners, allowing water to seep in. Seams can also pull apart or degrade, creating openings. Corrosion and rust, especially on older roofs, can also compromise the metal's integrity.

How long does a metal roof coating last?

A properly installed Conklin metal roof coating system can add 10-20 years of leak-free performance to your existing metal roof. The exact lifespan depends on the specific system used, the number of coats, and the local climate, but these systems are designed for long-term durability and can often be recoated for even more life.

Is it better to repair leaks or coat the whole roof?

For isolated, minor leaks, targeted repairs might offer a temporary fix. However, if your metal roof is showing multiple leak points, widespread rust, or is nearing the end of its service life, a full commercial roof restoration with a coating system is usually the more cost-effective and long-lasting solution. It addresses all potential leak sources at once, prevents future problems, and extends the life of the entire roof.

If your commercial metal roof is leaking, don't wait for the problem to get worse. Our network of Conklin-trained contractors can inspect your roof and give you an honest assessment of what it takes to stop the leaks for good. Call us at (309) 303-3128 or visit our contact page to schedule an inspection.