As a Sioux City commercial metal roof coating contractor, we fix laps and fasteners, prime rust, and coat steel roofs on shops, plants, and warehouses.
Sioux City commercial metal roof coating works when the steel is still firm. Use this table to see which column your roof sits in.
| Roof Detail | Ready To Coat | Fix Or Rethink First |
|---|---|---|
| Panels | Chalked paint, surface rust, light pitting | Rust holes, torn ribs, or panels that flex underfoot |
| Fasteners | Loose screws and dried-out washers | Stripped holes or purlins that no longer grip |
| End and side laps | Dirt and gaps that sealant can bridge | Laps pulled apart wider than a screw can close |
| Insulation | Dry readings from the meter and cores | Wet batts or board that hold water |
| Gutters and trim | Seams that leak at the joints | Gutters rusted through or pulled off the eave |
Four conditions show up on almost every older steel roof here. Each one gets handled before the coating goes on.
Three coating builds cover most commercial metal roofs. The roof walk tells us which one your panels need.
A water-based acrylic in two coats over a rust primer. It fits pitched panel roofs that drain fast and goes on in warm, dry weather.
Acrylic roof coatingHigh-solids silicone tolerates water standing in shallow bays. Most low-slope metal roofs with slow drains end up with this build.
Silicone roof coatingPolyester fabric embedded at every lap, curb, and gutter joint, then a full field coat. Older roofs with many leaking laps need this build.
Coating a commercial metal roof keeps the steel working for years with far less disruption than a tear-off.
The existing steel stays on the purlins, so the building stays dry and in use while each section is prepped and coated.
Primer and coating seal the steel from water and air, which halts the surface rust that slowly thins old panels.
A bright white coat reflects sun that dark, chalked panels absorb, keeping the roof deck cooler on July afternoons.
At the end of its rated term, a clean coating that still holds tight can take another coat in place of a full replacement.
Call with the building address and where the drips land. We walk the fastener lines and laps and tell you whether coating will stop them.
(402) 258-4527Call UsFive steps, in the order they happen on the roof. Prep takes longer than the coating itself.
We check every fastener line, lap, curb, and gutter, take moisture readings, and photograph each problem so the estimate shows exactly what we found on your steel.
Pressure washing clears chalk and dirt. Loose scale comes off with wire wheels, and bare metal gets primer before the crew leaves so flash rust has no time to form.
Loose screws get tightened, stripped ones upsized, and every head sealed. Laps, curbs, and gutter joints get sealant and fabric set in a base coat.
The coating goes on by spray or roller in one or two passes. We check wet thickness as we go so the dry film meets the spec in mils.
A final walk checks thin spots, missed fasteners, and edges. You get photos of the finished details and the coating data for your records.
Some roofs mix steel with flat sections or shingles. These services cover the rest of the building.
Low-slope bays and flat additions that hold water after storms get silicone, which handles ponding better than acrylic.
Silicone roof coating
Where a steel roof also needs insulation, foam covers the laps and fasteners in one layer under a protective coat.
Spray foam roofing
Office wings and front entries with pitched shingle roofs get their own coating when the shingles still lie flat.
Shingle roof coatingAnswers to what owners ask about coating steel roofs, from cost per square foot to permits.
Restoration is repair work plus a fluid-applied coating, done in that order. Crews wash the steel, grind off scale, prime bare spots, and tighten or upsize fasteners. Laps, curbs, and gutter joints get fabric and sealant. The field coat goes last, built up to the thickness the manufacturer lists for the rated term.
Fastener work comes first on these roofs. Each loose screw is driven tight or swapped for a larger screw where the hole has stripped. Heads get a brush-applied sealant, and end laps get a fabric detail. Once those cure, the field coat covers the sealed screws and the panels between them.
Rust is cleaned down to firm steel and primed. Wire brushes and power tools take off loose scale, and a wash removes chalk so primer can bond. A rust-inhibiting primer goes over every bare or rusted area. Spots that have rusted through are cut out or covered with new metal before any coating.
Prep is the biggest swing. A roof with heavy scale, hundreds of loose screws, and long runs of open laps takes more labor than one with light chalking. Square footage spreads setup costs, tall eaves and rooftop units slow access, and a thicker spec adds material. Wet insulation adds cut-out and replacement work.
That turns on the scope. Sioux City requires a building permit for work its building code regulates, and replacing panels or repairing the deck falls in that group more often than a coating-only job. We check each scope with Sioux City Inspection Services before the work goes on the calendar.
Get a ballpark range from your roof size, or call to book a fastener-by-fastener roof walk.