If Your Roof
Has white chalky powder on galvanized panels
White rust washes off, and a primer rated for galvanized steel goes on before the field coats.
Start WithWash And Galvanized Primer
R-Panel · Standing Seam · Barns
Nicholasville Commercial Metal Roof Coating
We coat commercial metal roofs in Nicholasville after the screws, laps, and rust are dealt with. R-panel, PBR, and older standing seam all qualify when the steel is firm.
- Rust graded before primer
- Stripped screws upsized
- Fabric over every lap
- Dry film thickness gauged
Is This Roof A Fit?
Four common metal roof situations and where each one starts. The last card is the one where coating waits.
If Your Roof
Leaks at the screws across an R-panel field
Each screw is checked, then tightened or swapped for an oversized one and capped before coating.
Start WithFastener Work, Then Coating
If Your Roof
Is older standing seam that leaks at end laps
Clips stay free to slide, so the coating over seam tops stays flexible while end laps and trim get reinforced.
Start WithSeam And Trim Detailing
If Your Roof
Has pinholes that show daylight from inside
Perforated steel gets patched with new metal or replaced before anything else happens.
Start WithPanel Repair First
Metal Roof Problems We Fix Before Coating
Metal roofs fail at the same handful of places. Each card names one, what it looks like, and what it means for the job.
Moisture
Heavy Scale At The Fastener Line
- You See
- Flaking layers of rust and pitting around screw heads and along the laps.
- What It Means
- Scale comes off down to firm steel, then primer and reinforcement go on. Pitting deep enough to thin the panel gets patch metal.
Panel Movement
Stripped Screw Holes
- You See
- Screws that spin without tightening, and holes left behind by earlier repairs.
- What It Means
- Stripped holes take oversized screws with new washers, and empty holes are plugged before fabric and coating go over them.
Heat Cycling
Split Caulk At Side Laps
- You See
- Old caulk pulled away from the lap edge in long, dry strips.
- What It Means
- The dried caulk is pulled out, rust at the overlap is primed, and fabric is embedded so the lap can flex without splitting again.
Condensation
Drips Below A Dry-Looking Roof
- You See
- Water on the floor on cool mornings with no visible hole above it.
- What It Means
- Condensation under the panels can mimic a leak. Coating the top seals leaks, while condensation needs ventilation work underneath.
Commercial Roof Coating Options for Nicholasville
The coating that goes over steel comes down to slope, end lap condition, and rooftop traffic. These are the systems we install on metal buildings.
| System | Best On | Goes Over | Watch For |
|---|---|---|---|
| Acrylic | Pitched R-panel that drains fast | Primed steel and many older coatings | Softens under standing water |
| Silicone | Low-slope metal and ponding end laps | Primed steel; later recoats stay silicone | Collects dirt over time |
| Spray Foam + Topcoat | Buildings that also need insulation | Clean, dry panels, ribs filled smooth | Overspray near cars and intakes |
Benefits of Coating Your Roof
Four ways a coating helps a metal roof, each tied to the part of the roof it protects.
- What Wears OutWashers cracked by years of sunWhat The Coating Does
Sealed Screw Heads
Capping each screw with sealant or brush-grade coating closes the most common leak point on an exposed-fastener roof without pulling a single panel.
- What Wears OutEnd laps that hold water on long runsWhat The Coating Does
Reinforced Laps
Polyester fabric bedded in coating carries the joint through daily movement, so long panel runs on low-slope buildings stop leaking at the overlap.
- What Wears OutSurface rust spreading from cut edgesWhat The Coating Does
Rust Stopped Early
Primer seals the cleaned steel and the coating keeps water off it, so surface rust stops spreading before it eats through the panel.
- What Wears OutInventory sitting under known leaksWhat The Coating Does
Less Downtime Inside
Work stays on top of the panels, so the floor below keeps running. Roof areas over stored goods can be sealed first.
Screws Backing Out Across The Roof?
Tell us roughly how many rows look loose and whether stains show inside. That sets how much fastener time the job needs.
Our Metal Roof Coating Process
Inspection, prep, and detailing take most of the time on a metal job. The coating itself is the last step.
Inspect Your Roof
We grade the rust at laps and cut edges, count loose and stripped screws along sample panel runs, and check purlins for sag from below where the building allows access.
Clean To Firm Steel
Panels, gutters, and trim are pressure washed with a cleaner matched to the finish. Scale is ground off at laps and screws until bright, firm steel shows.
Drive, Swap, And Cap Screws
Loose screws are driven tight, stripped ones are upsized, and every head gets a cap of sealant. On big warehouses this step runs into thousands of fasteners.
Fabric Over Laps And Trim
Side laps, end laps, ridge caps, and rake and eave trim joints get fabric or seam tape bedded in coating, brushed through until no dry fabric shows.
Prime And Coat The Field
Rust-inhibiting primer goes on where the finish calls for it, then base and top coats are sprayed or rolled and checked with a film thickness gauge.
Related Coating Services
Metal buildings often need one of these instead of, or along with, a metal coating.
Silicone Roof Coating
Low-slope metal behind a parapet holds water at end laps, and silicone handles that ponding better than acrylic does.
Silicone roof coating for low-slope metal
Spray Foam Roofing
When the building also needs insulation, foam over the panel ribs adds it and creates one continuous surface.
Spray foam over metal roofs
Acrylic Roof Coating
Steeper exposed-fastener roofs that drain quickly take a white acrylic topcoat that stays clean.
Acrylic coating on pitched metal roofsMetal Roof Coating Questions
Answers about metal roofs, written for Nicholasville buildings.
Fit
Which Commercial Metal Roofs Are Good Candidates for Coating?
Roofs with surface rust, backed-out screws, and leaking laps make good candidates while the steel underneath keeps its thickness.
Around Nicholasville that covers R-panel warehouses, older standing seam on churches and offices, chalky barn roofs, and low-slope metal behind strip-center parapets. Holes, sagging purlins, or panels that flex underfoot need structural work first.
Rust
Can You Coat Over a Rusty Metal Roof?
Light and moderate rust, yes. White rust is washed and primed for galvanized steel, red rust is brushed and primed, and heavy scale comes off down to firm steel.
Perforation is the line. Pinholes or holes that show daylight get new metal or a replacement panel before coating.
Panel Types
What Is the Difference Between Standing Seam and Exposed-Fastener Roofs for Coating?
The coating is similar, but the labor lands in different places.
On R-panel and PBR roofs every screw and side lap gets work. Standing seam hides its clips, so attention goes to end laps, ridge, trim, and penetrations, and the coating over seam tops has to stay flexible because those panels slide on their clips.
Prep
What Prep Work Does a Metal Roof Need Before Coating?
Washing comes first. A pressure wash with a cleaner matched to the panel finish takes off dirt, chalk, and mildew so primer can bond.
Then come rust scraping at laps and edges, panel and skylight replacements, screw work, and masking of rooftop units. A small adhesion test on cleaned steel confirms the primer will hold before the whole roof is coated.
Leaks
How Do You Tell A Roof Leak From Condensation?
Timing and weather give it away. Drips on cool, dry mornings point to condensation forming under the panels, while drips during or after rain point to a leak.
We check panel undersides where access allows. Coating the top seals leaks, and condensation needs ventilation or insulation changes inside the building.
Get Your Metal Roof Coated
Send the roof details through the estimate form or call to describe the building. A roof walk comes before any price is final.