Why Is My Metal Roof Leaking?

Metal Roof Repair Columbus Ohio

Is your metal roof leaking? Metal roofing can leak for a few reasons. Your leak could be due to improperly driven screws, leaky stack flashings, a lack of sealant, or a combination of these issues. When you call DeMarco Inc. for repairs, our team will inspect your building and get to the bottom of your metal roofing problems. Contact us today to learn more about our metal roofing services.

Why is My Metal Roof Leaking?

Here are a few of the most common reasons why your metal roof could be leaking:

Improperly Driven Screws

Improperly driven screws are responsible for many of the leaks we see. When roofing screws are driven correctly, the screw is straight, there is good penetration, and a rubber washer forms a waterproof seal against the surface of the roof. Unfortunately, roofing screws are often overdriven, underdriven, or misaligned. These errors can lead to water leaking in through the screw’s hole.

Leaky Stack Flashings

Water could also be leaking in through your stack flashings. Stack flashings are the rubber seals that surround your roof’s pipes and HVAC vents. Over time, these seals degrade, allowing water to seep through. Since HVAC units are usually installed on curbs, building owners should also keep an eye on the condition of their curb flashings.

Lack of Sealant

Another reason your roof could be leaking is because of a lack of sealant. If you’ve never sealed your roof or it’s been a while since you last applied sealant, it might be time for a touch up. It’s important to use a sealant that is flexible enough to handle the daily expansion and contraction of your metal roof’s panels. At DeMarco, we use a silicone coating specifically made for metal roofing panels.

Our Metal Roof Repair Process

Our Metal Roof Repair Process


First, our team will do a visual inspection of your roof. We’ll take a look at your metal roofing’s screws, panels, flashings, and other elements. Once we identify the major leaks, we’ll give you an estimate for the work.


Next, we use infrared thermographic imaging to identify areas of your metal roofing that have leaks and trapped moisture. We can identify a lot of leaks just by inspecting your roof, but our thermographic imaging tools show us leaks we might have missed.


Once we’ve identified the problem areas, we get started on the repairs. Repairing your roof might involve replacing improperly driven screws, resealing flashings, or mending bad panels.


Finally, we apply APOC sealant to your roof’s surface to give your metal roofing an extra layer of protection. This durable silicone sealant creates a flexible barrier over your roof’s surface to protect it from the elements.

Protect Your Roof with Silicone Roof Sealant

Protect Your Roof with Silicone Roof Sealant

Sealing your metal roof is one of the best steps you can take to prevent future leaks. It’s important to use a flexible sealant that can withstand the daily expansion and contraction of your roof’s metal panels. At DeMarco, we use APOC sealant to protect your metal roofing. This flexible silicone sealant creates a durable membrane over your roof’s surface to protect it from the elements. Here are just a few of the reasons why you should use a metal sealant on your commercial property’s roof:


Sealants give your metal roof an extra layer of protection against rainwater. Keep your building warm and dry with a durable silicone roof sealant.

Energy Efficient

Sealants keep your roof cooler by reflecting sunlight. This heat deflection can help you keep your building’s energy costs down during the warmer months.

Rust Prevention

Sealants form a barrier in-between your metal roof and the elements. This barrier helps prevent rust, which extends the overall lifespan of your building’s roof.

Metal Roof Repair VS Replacement

Metal Roof Repair V.S. Replacement

If your metal roof is leaking, you might be wondering whether to repair or replace it. In most cases, you can get away with repairs. Leaks usually occur in less than 10% of the total roofing area, so roofing repair is usually the best option. Replacement is only necessary when there is extensive damage or structural issues. Metal roof systems are durable and can last for 50 years with proper maintenance.

Metal Roof Installation Columbus Ohio

Metal Roofing Installation Columbus Ohio

In addition to repairs, DeMarco also provides metal roof installation services. We install metal roofs on both residential and commercial buildings in the Columbus Ohio area. Our team typically uses a standing seam design, which means the panels overlap and have raised seams.

DeMarco is also a Certified Master Installer of PVS, TPO, KEE, and EPDM roofing systems from manufacturers like Carlisle, Firestone, Tremco, and Johns Manville. We custom design each roof so that our customers get exactly what they want.

Are you considering a metal roof for your home or commercial property in Columbus? Contact us today to learn more about our metal roofing services.

The Benefits of Metal Roofing

The Benefits of Metal Roofing

Metal roofing is a popular choice for both residential and commercial buildings. Here are a few reasons why it’s so popular:


Metal roofs are strong and long lasting. With proper maintenance, metal roofs can last for 50 years.

Energy Efficiency

Metal roofs reflect sunlight, which helps keep your building cooler in the summer. A naturally cooler building in the summer translates to lower air conditioning bills.


Metal roofs give homes and commercial buildings a sleek, modern appearance. Standing seam panels come in a variety of sizes, colors, and finishes.

Easy to Install

Metal roofs are also fast and easy to install. The panels are light and easy to handle during installation.

Our Other Roofing Services

Our Other Roofing Services


Need roof replacement? DeMarco re-roofs both residential and commercial buildings in the Columbus Ohio area.

Visit Re-Roofs

Curb Installation

Upgrading your commercial property’s HVAC equipment often requires curb modifications. Our team can install, repair, and upgrade your building’s curbs.

Visit Curb Installation

Roof Analysis

Is your commercial building’s roof overdue for maintenance? DeMarco provides surveys, core cuts, and infrared thermographic imaging services.

Visit Roof Analysis

Chimney Repair

Is your chimney falling apart? DeMarco is experienced in repairing brick, stone, and eroding mortar.

Visit Chimney Repair

Slate Roof Repair

Slate roofs are elegant and durable. Keep your home looking beautiful with our slate roof repair services.

Visit Slate Roof Repair

Masonry Repair

Masonry is an ideal choice for a number of residential and commercial buildings in Columbus. Our team is experienced in all aspects of masonry restoration.

Visit Masonry Repair

The DeMarco Difference

The DeMarco Difference


At DeMarco, our team is committed to safe work practices. Our supervisors carry OSHA 30 hour cards, and our employees carry OSHA 10 hour cards. Our company’s experience modifier rating from The Ohio Bureau of Workers’ Compensation is 0.79.

Quality and Workmanship

Our team takes the time to repair your metal roofing the right way. We take pride in our work and don’t cut corners. When you choose DeMarco for your next roofing project, you can be confident in the quality of our services.


Our company’s long-term reputation for quality work gives our manufacturers’ inspectors the confidence to provide our Columbus customers with 20, 25, and 30-year “No Dollar Limit” manufacturer’s warranties. When you get a new metal roof from DeMarco, your investment will be covered for years to come.

Dedicated Team

Our company’s owners, Kim and Victor, are involved in every project from start to finish. We care about our Columbus customers and strive to be accessible to you throughout every step of your project. Unlike many roofing companies, we employ our crews of roofing contractors instead of using subcontractors.

Challenging Projects

We take on unique, challenging roofing projects throughout Columbus, Ohio. Our team enjoys jobs that are complex and logistically difficult. Contact us today if you have a challenging project that other Columbus roofing companies won’t take on.

Choose DeMarco for Metal Roof Repair in Columbus Ohio

Contact DeMarco Inc. today for metal roof repairs in Columbus Ohio. Our company has been repairing commercial roofs for over 30 years. When you choose DeMarco, you can rest easy knowing your metal roof will be repaired the right way. Call us today to schedule an inspection and get a quote.

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1160 South Front Street, Columbus, OH 43206