Metal buildings are renowned for their durability, but like any structure exposed to the elements, time and wear can take a toll. Whether it’s a dented panel from storm damage or a persistent leak that’s starting to cause trouble, knowing how to address these issues quickly and correctly is key to protecting your investment. At Portable Buildings of Ravenel, we not only build strong—we help you keep your building that way.

In this blog, we’ll share a practical guide on replacing damaged metal panels and sealing leaks before they become bigger problems.

First: Diagnose the Problem

Not all damage is apparent. A missing screw might lead to a leak, and a small puncture can become a bigger issue if moisture gets in. Here’s what to look for:

Water stains on the interior walls or ceiling
Rust streaks or corrosion around seams and fasteners
Loose or warped panels on the roof or siding
Dripping during or after rain—even small drips mean something needs attention

Don’t just look at the damaged area—trace the leak to its source. Water can travel along rafters or insulation before it becomes visible inside the building.

Replacing Metal Panels: Step-by-Step

If a wall or roof panel is too damaged to seal or patch, replacement may be your best option.

1. Assess the Extent of the Damage

Check whether only one panel needs to be replaced or if the surrounding panels are also affected. Sometimes, hail or wind damage can compromise a whole section of roofing or siding.

2. Gather the Right Materials

Replacement panel(s) that match your building’s gauge, color, and profile
Screws or fasteners (preferably stainless or coated to resist corrosion)
Screw gun, sealant, gloves, safety gear
Pry tools or an impact driver to remove old fasteners

If you’re unsure about the profile or paint match, please give us a call. We can help you find the right product to blend seamlessly with your existing building.

3. Remove the Damaged Panel

Unscrew the panel carefully, watching for any attached insulation or wires that may be behind it. For roofing, it may be necessary to remove fasteners from the neighboring panels just enough to lift and slide out the damaged one.

Be careful—metal edges can be sharp. Wear gloves and eye protection.

4. Install the New Steel Panel

Slide the replacement panel into place and align it correctly with the adjacent panels. Drive in new screws at the same spacing as the originals. Avoid overtightening—this can crush the panel or compromise waterproofing.

Apply a bead of metal-compatible sealant along the seams or where recommended.

Sealing Leaks: A Quick Fix or a Permanent Solution?

If the panel itself is in good shape but moisture is sneaking in through seams, screws, or tiny gaps, sealing is often all that’s needed.

Common Leak Points:

Around screw holes that have loosened over time
At overlapping panel seams
Near vents, skylights, or penetrations
Along flashing or transitions between roof pitches

1. Clean the Area

Before applying any sealant or patching material, make sure the area is clean and dry. Use a brush or cloth to remove dirt, rust flakes, or old sealant.

2. Choose the Right Sealant

Use a polyurethane-based or butyl rubber sealant rated explicitly for use on metal and outdoors. Avoid silicone sealants, which don’t adhere well to metal in the long term.

For fasteners that are leaking, consider installing oversized replacement screws with neoprene washers.

3. Apply Sealant Generously

Apply a bead of sealant over the suspect seam or hole, then use a putty knife to smooth it over and ensure complete coverage. If a screw hole is stripped, you may need to patch the hole with a metal patch or replace the screw with a larger one.

Let the sealant cure thoroughly before exposing it to heavy rain.

When to Call a Pro

Some issues are more than DIY-friendly fixes. Consider professional help if:

The leak is widespread or difficult to locate
You have multiple failing panels, or rust is spreading
The repair involves tall heights or steep roof pitches
You’re unsure about structural safety or insulation beneath the damage

Ravenel Buildings offers professional service and guidance for maintaining, upgrading, or repairing your metal building the right way. Don’t wait for a small leak to become a significant headache.

Keep It Tight, Keep It Dry with Help from Ravenel Buildings

Your metal building in Ravenel, SC, is built to last, but it requires regular maintenance, just like any other structure. Knowing how to properly seal and replace panels gives you the power to extend the life of your building and avoid costly repairs in the future.

Need help with materials, panels, or full repairs? Contact Ravenel Buildings today. Whether it’s a metal roof leak or dented wall panel, our pre-engineered metal building experts will help ensure your building’s structural integrity with the right parts—and the right people—for the job.

How to Replace Panels or Seal Leaks in an Existing Metal Building