Commercial metal roof coating in Hopkinsville for exposed-fastener R-panel and standing seam roofs. Every screw, lap, and rust spot is repaired before we coat the panels.
Two panel styles cover most metal roofs we see. They leak in different places, so the prep list changes with the panel.
| Prep Item | Exposed-Fastener R-Panel | Standing Seam |
|---|---|---|
| Main leak points | Screw washers, side laps, end laps | End laps, seam ends, curbs, trim |
| Fastener work | Tighten, upsize, or replace loose screws | Clips stay hidden; trim screws get checked |
| Seam treatment | Reinforcing fabric over the laps | Sealant at seam ends and transitions |
| Panel movement | Lower; panels are fastened tight | Higher; panels float on clips |
| Ready to coat when | Steel is firm under surface rust | Seam caps and trim are tight |
Rust holes along the bottom edge of a lap, or panels that flex underfoot, move a roof from coating to panel replacement first.
These conditions show up on R-panel and standing seam roofs across Christian County. Each one is repaired before a coat touches the panels.
Metal panels take three systems well. The slope of the roof and where water sits decide which one we put down.
Low-pitch metal sections that hold water at gutters or behind curbs get silicone, which holds up where water lingers. Later recoats on those roofs are silicone as well.
Silicone roof coating
Steeper R-panel shops and barns shed rain within minutes, so an acrylic coat fits them. It cleans up with water and accepts acrylic recoats years later.
Acrylic roof coating
Spray foam fills the panel ribs and insulates the building under a protective topcoat. Owners pick it for shops and cold storage with bare steel overhead.
Spray foam roofingThese gains hold on metal roofs where the steel is still solid and the purlins are dry.
Thousands of screw heads and every lap sit under one membrane, so the joints that leak most on an R-panel roof are covered at once.
When the coat wears thin years from now, it is cleaned and recoated instead of torn off, as long as the steel below stays firm.
Owners pay for prep and coating rather than tear-off, disposal, and new panels, and the building keeps working while the surface is renewed.
Primed rust spots, scratched paint, and panel cut edges stay dry under the coat, so fresh rust starts more slowly.
Call us and say roughly how many screws stand proud and where the drips show inside. Loose fasteners are the first repair on most R-panel roofs.
Call UsFour stages take an R-panel or standing seam roof from bare steel to a finished coat.
We count loose or missing screws, check every side lap and end lap, and probe rusted spots for soft steel. Ceiling stains inside are matched to the seams above them.
Stripped screws are upsized to bite fresh steel, and cracked washers are replaced. Panels with holes rusted through get a metal patch or a new panel before any primer.
Pressure washing strips chalk and mill oil. Red rust is ground to firm metal and primed, then laps, ridge caps, and curbs get fabric or seam sealer.
Coating is sprayed or rolled over the whole roof to the specified thickness. Screw heads are covered again, and thin spots are measured and touched up.
Some metal roofs call for a different system. These three pages explain when.
Pick silicone coatings for low-slope metal when water sits for a day at the gutter line or behind a rooftop unit curb.
See silicone roof coatingConsider acrylic coatings for pitched metal roofs on steeper shops where rain runs off fast and odor matters to people inside.
See acrylic roof coatingLook at spray foam over existing metal panels if the building has no insulation and the steel drips on cold mornings.
See spray foam roofingAnswers about panels, screws, and rust on the metal roofs we coat.
Yes, both coat well, but the prep differs because each leaks in different places. An R-panel roof has thousands of screws through the sheet face, and each washer is a possible leak.
A standing seam roof hides its clips under raised seams, so trouble starts at end laps, penetrations, and trim. Its panels also float more, so the details must flex.
Only the ones that need it. Screws that are backed out, stripped, or missing their washer get tightened, upsized, or replaced.
Tight screws with good washers stay, and every head is then sealed with a dab of compatible sealant before the field coat covers it again. On older R-panel roofs, that fastener work is often the longest part of the job.
Coatings go over rusted steel once the loose rust is removed and the surface is primed. Flaking red rust is wire-brushed or ground until firm metal shows, then a rust-inhibiting primer goes on before any topcoat.
Light rust bloom across a panel face handles well this way. Pinholes or soft spots at a lap edge need a patch or new panel first.
We probe it. Surface rust scrapes off to firm, gray steel, and the panel stays stiff under a screwdriver tip.
Rust-through leaves a hole, a crust that crumbles, or steel that flexes when pressed, most often at the bottom edge of an end lap or along the eave. Those panels are marked on the roof plan for patching or replacement.
A flexible coating moves with them. Steel grows on hot afternoons and shrinks on cold nights, which is what loosens screws and opens laps over time. Reinforced lap details stretch with that movement, and the field coat bridges small gaps at screw heads. Standing seam panels move more, so their seam ends get extra sealant.
Sagging is a framing repair first. A coating covers the weather surface and adds no strength to purlins or panels.
When steel dips between supports or flexes underfoot, the purlin or the panel is repaired or replaced, and the coat goes on afterward. Coating over a dip leaves standing water against the membrane in that same low spot.
Enter the roof size for a free ballpark range, or call and describe the screws, laps, and rust you see.
Leave a name and number and we will call you back about your commercial roof. Or call now: (270) 236-5496.