Heat
Fastener Holes Wallowed Out
- You See
- Screws that spin freely or sit crooked in the panel.
- What It Means
- Years of panel movement widen each hole. An oversized screw with a new washer bites fresh metal and closes the path water was following.
Merrillville, Indiana
Merrillville Commercial Metal Roof Coating Contractor
Commercial Metal Roof Coating That Restores Rusted, Leaking Panels
As a Merrillville commercial metal roof coating contractor, we grind and prime the rust, reseal every screw and lap, then coat the steel.
- Rust ground to firm steel
- Oversized screws, new washers
- Thickness measured in mils
Fit Check
Is Your Merrillville Roof Ready for Commercial Metal Coating?
Merrillville commercial metal roof coating works on steel that is still firm. Compare your roof to the two columns, then let the inspection settle it.
| Roof Detail | Ready To Coat | Fix First |
|---|---|---|
| Panel Steel | Surface rust over firm metal | Holes, soft spots, or flaking layers |
| Fasteners | Some loose, most holding | Screws spinning in rotted purlins |
| Side And End Laps | Sealant dry, laps closed | Laps lifted or panels shifted |
| Curbs And Skylights | Flashing intact, edges rusty | Curbs leaking from cracked flashing |
| Insulation | Dry under every probe point | Wet or sagging blanket insulation |
Fixed First
Merrillville Commercial Metal Roof Coating: Conditions We Fix First
Four conditions show up on nearly every screw-down steel roof we coat. Each one gets fixed before the coating goes on.
Moisture
Rust Under Old Paint at the Laps
- You See
- Paint bubbling and orange lines along the end laps.
- What It Means
- Water trapped in the lap rusts both sheets from the inside. Grinding opens the lap edge so primer reaches the steel before sealing.
Storms
Hail Dents and Crushed Washers
- You See
- A new drip after a spring storm, with dimpled panels above it.
- What It Means
- Crushed washers and split seams leak, while dents alone are cosmetic. Each damaged washer is replaced, and photos come first if a claim is filed.
Clogs
Overflowing Gutters at the Eaves
- You See
- Water sheeting over the gutter lip and staining the wall.
- What It Means
- Debris and rust choke gutters on long metal roofs, so water backs up under the eave panels. Gutters get cleared and resealed during prep.
Your Options
Commercial Roof Coating Options for Merrillville
Three ways we coat a screw-down steel roof, picked by how the roof drains and how much the building needs from it.
Acrylic Over Primed Steel
Pitched steel that sheds water quickly takes acrylic in two or more coats, laid over rust primer and sealed fasteners.
Acrylic coating detailsSilicone Where Water Sits
Shallow-pitch steel with slow eaves gets silicone, which tolerates short ponding and goes on in fewer, thicker passes.
Silicone coating detailsFoam Over Tired Panels
Steel that leaks in dozens of places and loses heat can take spray foam over the panels, finished with a protective topcoat.
Spray foam detailsBefore And After
Benefits of Coating Your Roof
What a coated steel roof looks like next to the same roof today.
Before Coating
- Hundreds of exposed screw heads, each a possible leak
- Rust creeping out from cut panel ends
- Laps opening a little more every winter
- Drips landing on stock and equipment below
After Coating
- Every screw head capped and sealed under the coat
- Primed steel sealed away from air and water
- Laps bridged with seam tape or reinforced mastic
- A dry floor below, with tear-off left for a later year
Before You Call
Screws Weeping Rust Down the Panels?
Rust streaks below the fasteners mean the washers have failed. That fix is part of every metal coating job, and it goes faster while the steel around each hole is firm.
What To Have Ready
- Building address
- Roughly where the streaks are
- Panel type, if known
How It Goes
How Commercial Metal Roof Coating Goes On in Merrillville
Five steps, with the fastener work in the middle where it belongs.
- Findings
Inspect Your Roof
We count loose and stripped screws, mark open laps, probe the insulation for moisture, and photograph each curb. That tally becomes your repair list.
- Wash
Pressure Wash the Panels
Washing removes chalk, dirt, and loose paint flakes so primer meets clean metal. Runoff is routed to the gutters and downspouts, away from doors and docks.
- Prime
Treat Rust to Firm Steel
Grinders and wire wheels take rust down to bright or firmly rusted steel. A rust-inhibiting primer goes on those spots before any moisture returns.
- Detail
Replace Screws, Seal Laps
Oversized screws with new washers go in where the old ones failed. Heads get sealant or reinforced patches, and laps get seam tape or mastic.
- Coat
Build the Coating
Base and top coats go on to the mil thickness the product sheet lists, checked with a wet-film gauge across the field and at every lap.
Related Systems
More Coating Systems We Apply in Merrillville
If part of the building needs a different system, these four cover the rest.
Silicone Roof Coating
Flat or slow-draining sections next to the steel get silicone, which tolerates water that lingers after rain.
Silicone Roof Coating in Merrillville
Acrylic Roof Coating
Steep, fast-draining panels take acrylic, a water-based coat that is simple to renew down the road.
Acrylic Roof Coating in Merrillville
Spray Foam Roofing
Buildings that need insulation added on top get spray foam first, then a protective coating over it.
Spray Foam Roofing in Merrillville
Shingle Roof Coating
Office wings roofed with asphalt shingles take a coating made specifically for shingles.
Shingle Roof Coating in MerrillvilleOwner Questions
Commercial Metal Roof Coating Questions From Merrillville Owners
Answers about hail, fasteners, rust, cost, and weather on screw-down steel roofs.
Can You Handle Coating a Metal Roof After Hail?
Yes, once the storm damage is repaired. Punctured panels, split seams, and crushed washers are fixed first, and cosmetic dents get coated over. If an insurance claim is open, we photograph the damage before touching anything, so the adjuster sees the roof as the storm left it.
What Goes Into Coating Exposed-Fastener Metal Roofs?
Fastener work is the heart of the job. Every screw is checked, failed ones are replaced with oversized fasteners and new washers, and each head is sealed or patched with reinforced fabric. Side laps and end laps get seam tape or mastic before the coating covers everything.
How Is Metal Roof Rust Treatment Before Coating Done?
Washing comes first, then grinding or wire-brushing loose rust down to firm metal. A rust-inhibiting primer covers every treated area so rust stops spreading under the coating. Panel ends and laps get the most attention, since water sits longest there.
What Is the Commercial Metal Roof Coating Cost per Square Foot?
Expect roughly $2.50 to $4.00 per square foot for coating, compared with about $5 to $8 per square foot to replace the panels. The inspection sets your number. Rust volume, how many screws and laps need sealing, primer, coating thickness, and access are what move it.
Is Coating a Good Match for Medical Office Roofs?
Coating seals leaks over exam rooms and offices with the roof left in place, so patients and staff below see little disruption. Noisy steps such as screw replacement and washing are timed around office hours, and a light-colored coat keeps the roof surface cooler in summer.
Does Freeze-Thaw Weather Break Down a Coated Metal Roof?
Freeze and thaw cycles go after water that gets under coating edges or into open seams. With laps and screws sealed and the coating well attached, most water stays out. A spring check of seams, fasteners, and penetrations catches any lifted spots so they are resealed before winter.
Free Estimate
Hire a Merrillville Commercial Metal Roof Coating Contractor
Get a ballpark range for your steel roof, or call to set up the roof walk.