Winston-Salem’s mix of old tobacco warehouses turned office space and modern industrial buildings share one thing in common: metal roofs that expand and contract with every temperature swing. We see it all the time in the Triad—a roof that leaks during one storm but stays dry during the next three. That sporadic pattern isn’t random. It’s your metal roof moving at transitions, and it’s doing more damage than you realize. If you’re dealing with mysterious leaks in your Winston-Salem building, you need metal roof repair winston-salem nc services from someone who understands why metal roofs behave the way they do.
What We Found on This Statesville Metal Roof
We got called out for a metal roof that leaked sometimes but not always. The owner couldn’t figure out the pattern. One heavy rain would cause puddles inside. The next storm—nothing.
We found the problem at the transitions. A transition is where two roof sections meet at different angles or heights—usually at an HVAC unit curb, a wall junction, or where the main roof meets a lower section. These spots move more than the field of the roof because you’ve got two planes of metal expanding and contracting in different directions.
The closure strips at these transitions had pulled away. Not completely—just enough to open up during certain temperature conditions. When the metal was cold and contracted, water found its way in. When the metal heated up and expanded, the gaps closed and the leak stopped. Classic intermittent leak.
We also found soaked insulation underneath. The sporadic nature of the leak had fooled the owner into thinking it wasn’t serious. But water doesn’t care if it comes in every storm or every third storm. It still rots insulation, rusts metal from the inside out, and creates conditions for mold.
Why Metal Roof Movement Causes Problems in Winston-Salem NC
Metal roofs expand when they heat up and contract when they cool down. In Winston-Salem, where you can see a 40-degree temperature swing between morning and afternoon in spring and fall, that movement is constant.
The field of the roof—the big open sections—can handle this movement. That’s what the fastening system is designed for. But transitions are a different story. When two roof sections meet, you’ve got competing forces. One section is pulling one direction while the adjacent section pulls another. The closure strips and flashing that seal these joints take all that stress.
Over time, sealants dry out. Fasteners back out slightly. The metal fatigues. Gaps open up—sometimes just hairline cracks that only leak under specific conditions. You get wind-driven rain on a cold morning when the metal is contracted? Water gets in. You get a calm rain on a warm afternoon? The metal has expanded enough to close the gap, and you stay dry.
That’s why these leaks are so hard to track down. They’re not consistent. But the damage they cause is very real. Wet insulation loses its R-value. It adds weight to the roof deck. It grows mold. And if you’ve got fiberglass insulation, it holds moisture against the metal decking, which accelerates rust from the inside where you can’t see it.
How We Handle Metal Roof Repair at Transitions
For this project, we used spray foam to seal the transitions. Not the canned stuff from the hardware store—closed-cell spray polyurethane foam applied with professional equipment.
We started by removing any loose or failed closure strips. We cleaned the metal thoroughly—no dust, no oil, no old sealant residue. Foam won’t bond properly to a dirty surface, and we don’t do temporary fixes.
Then we applied the foam in multiple passes. You can’t just dump foam into a gap and walk away. You build it up in layers, letting each pass cure partially before adding the next. This gives you a dense, uniform seal that moves with the metal instead of cracking away from it.
Once the foam cured, we trimmed it flush and applied a protective coating. UV light degrades exposed foam over time, so we always coat it. The coating also gives you a clean finished look instead of yellow foam showing on your roof.
The whole repair took less than a day. The foam was trafficable within an hour and fully cured by the next morning. The owner went from sporadic leaks and damaged insulation to a watertight transition that’ll move with the roof for years.
This is exactly the kind of work we do with our Metal Roof Repair services throughout the region. We fix the problem at its source instead of slapping tar over it and hoping for the best.
Signs You Need Metal Roof Repair in Winston-Salem
Here’s what to watch for:
- Leaks that come and go — If you can’t predict when your roof will leak, you’ve likely got movement issues at transitions or seams
- Water stains that grow slowly — A stain that gets slightly bigger over months instead of gushing in one storm means you’re getting small amounts of water regularly
- Wet insulation — If you can access the underside of your roof deck and the insulation feels damp or compressed, you’ve been leaking for a while
- Rust stains on the interior — Orange or brown streaks on your metal decking from inside mean water is getting through and sitting against the metal
- Failed tar patches — If someone put tar on your roof to stop a leak, that’s a temporary fix at best. Tar dries out and cracks. The metal moves seasonally and the tar can’t move with it. Water gets underneath the tar, and you end up with rust trapped under what was supposed to be a seal.
- Gaps at curbs or walls — Walk your roof (if it’s safe) and look at where the roof meets HVAC units, walls, or other roof sections. If you can see gaps or separated closures, you’re leaking or about to be.
- Backed-out fasteners — Screws that have worked their way up out of the metal lose their seal. Look for screws that sit higher than they should or have rust around the washer.
Don’t wait until you can see daylight through your roof deck from inside. By the time light is coming through, the roof has been leaking for years and you’re looking at serious structural damage.
Why Sunny Sky Roofing LLC for Your Winston-Salem Metal Roof
Joe Yutzy started Sunny Sky Roofing LLC because he got tired of seeing building owners get sold full roof replacements when a targeted repair would’ve solved the problem. We’ve worked on metal roofs all over the Triad, and we know how they behave in this climate.
We don’t show up with a caulk gun and a tube of sealant. We use professional-grade materials designed for commercial roofing. Our spray foam repairs are engineered to move with your metal roof instead of fighting against it. We coat our foam so it lasts. We clean surfaces properly before we seal them. We do the work right the first time.
We also don’t oversell. If your roof needs a full restoration or replacement, we’ll tell you. But if a transition repair will buy you another decade of service, that’s what we’ll recommend. We’re here to protect your building and give you straight answers, not to maximize our invoice.
We offer commercial roofing in Winston-Salem and throughout the surrounding areas. We know the buildings here. We know the weather patterns. We know what works.
We also recommend annual roof inspections at minimum. A quick inspection catches small problems—a loose fastener, a separating closure, a developing rust spot—before they turn into leaks and insulation damage. An inspection costs a fraction of what you’ll spend fixing water damage inside your building.
Real Questions About Metal Roof Repair
Why does my metal roof only leak sometimes?
Metal expands when it heats up and contracts when it cools down. If you’ve got a gap or failed seal at a transition or seam, it might only open up under certain temperature conditions. Cold metal contracts and opens gaps. Warm metal expands and closes them. That’s why you get sporadic leaks that seem random but are actually temperature-dependent. The problem is still there even when it’s not actively leaking, and the damage continues.
Can you fix a metal roof leak without replacing the whole roof?
Absolutely. Most metal roof leaks are isolated to specific areas—transitions, seams, penetrations, or fastener lines. We can repair these areas with spray foam, new closures, proper flashing, or seam sealing depending on what the roof needs. A full replacement is only necessary when the metal itself has rusted through across large areas or the fastening system has failed entirely. Targeted repairs are more cost-effective than full replacement when the bulk of your roof is still in good shape.
How long does a spray foam repair last on a metal roof?
When applied correctly and coated for UV protection, spray foam repairs can last 15 to 20 years or more. The key is proper surface prep and using closed-cell foam with the right density. The foam bonds to clean metal and moves with the roof instead of cracking away like rigid sealants do. We always coat our foam repairs to protect them from sun degradation. It’s a permanent repair, not a band-aid.
What’s wrong with using tar to fix metal roof leaks?
Tar is a temporary fix that creates long-term problems. It dries out and cracks within a year or two. Metal roofs move with temperature changes, and tar can’t flex with that movement—it just cracks. Once it cracks, water gets underneath the tar and sits against the metal. Now you’ve got trapped moisture accelerating rust in a spot you can’t see or dry out. The tar also makes future repairs harder because you have to clean off all that old dried tar before you can do a proper fix. We see failed tar patches on almost every old metal roof we inspect.
Get Your Winston-Salem Metal Roof Fixed Right
If you’re dealing with leaks at transitions, failed closures, or water damage from a metal roof that leaks when it feels like it, we can help. Sunny Sky Roofing LLC handles metal roof repair throughout Winston-Salem and the surrounding Triad area.
We’ll inspect your roof, show you exactly what’s causing the problem, and give you a straight answer about what it’ll take to fix it. No overselling. No temporary patches. Just solid repairs that protect your building.
Call us at 336-523-2103 or contact us through our website. Let’s get your Winston-Salem metal roof watertight before the next storm.
