Red Rust
Rust At Laps And Eaves
Loose scale gets wire-brushed or ground off, then a rust-inhibiting primer goes on. Spots that crumble when pressed with a screwdriver get new steel first.
Exposed-Fastener And Standing Seam
Richmond Commercial Metal Roof Coating
We coat commercial metal roofs in Richmond, from exposed-fastener R-panel warehouses to standing seam offices, sealing screws, laps and rust before the roof coating goes on.
- Screws tightened, replaced or capped
- Fabric over side and end laps
- Rust primed before the base coat
- Ridge caps and trim checked
Panel Types
Is Your Metal Roof A Fit For Coating?
Two panel types cover most commercial metal roofs around Richmond. The prep differs, so the first thing we note is which one you have.
| Detail | Exposed-Fastener R-Panel | Standing Seam |
|---|---|---|
| Where It Leaks | At screw heads with dried washers, and at end laps on low slopes | At open seam ends, end laps, and around curbs and pipes |
| Fastener Work | Every screw checked, tightened or swapped for a larger one, then capped | Few exposed screws, mostly at trim, ridge and eave |
| Lap Detail | Side laps and end laps get fabric or seam tape | Seam ends and any pulled-apart seams get treated |
| Panel Movement | Screws back out as panels heat and cool | Panels float on hidden clips |
| Biggest Labor Item | Fastener count across the whole roof | Seams, curbs and penetrations |
Both panel types get a full power wash and a rust check before primer goes down.
Roof Conditions
Conditions We Find On Richmond Metal Roofs
Each of these turns up on metal buildings around Richmond, and each gets its own repair step before any coating covers it.
White Rust
Powder On Galvanized Panels
Galvanized steel grows a chalky white deposit as it weathers. It has to come off completely, or the primer bonds to the powder instead of the metal.
Backed-Out Screws
Screws Standing Proud
Panels swell and shrink with each day of heat, and that movement walks screws out of their holes. A slightly larger screw bites fresh metal.
Curbs
Leaks Around HVAC Curbs
Exhaust and rooftop unit curbs get reinforcing fabric where they meet the panels, because water collects on the uphill side of every curb.
Coating Options
Commercial Roof Coating Options for Richmond
Metal roofs here get one of three coating builds. The roof walk decides which, based on slope, standing water and whether the building needs insulation.
Acrylic Over Metal
Bright white and water-based, a strong match for gable shops and pitched warehouse roofs that drain fast. It cures on warm, dry days.
Acrylic roof coatingSilicone Over Metal
Built for very low slopes where water sits at end laps or behind units after rain. Later recoats stay with silicone.
Silicone roof coatingSpray Foam Plus Coating
Foam buries every screw and fills the panel ribs, adding insulation to bare metal buildings. A coating over the foam shields it from sun.
Spray foam roofingBenefits
Benefits of Coating Your Roof
These are the gains from coating a metal roof that still has solid steel and framing under the rust.
Lower Cost Than New Panels
With solid panels and framing, coating usually costs less than tear-off, because the panels, purlins and trim stay right where they are.
Every Fastener Sealed
Each exposed screw gets checked, tightened or swapped, then capped with sealant, so the most common leak on R-panel roofs is handled across the whole roof at once.
Rust Stopped Where It Starts
Primer on cleaned steel and a continuous coating over it keep water and air off the metal at laps, eaves and screw holes, where corrosion spreads first.
Less Waste And Noise
No dumpsters of old panels leave the property, and the work stays on top of the roof, so the shop or warehouse below keeps running through most of the job.
Drips Showing Along A Purlin?
Water from a leaking screw often travels along the purlin before it falls. Tell us where it lands and where the nearest lap sits above it.
Planning A Coating
Planning a full coating? Start a free estimate with the roof size and address.
Get A Free EstimateProcess
How We Coat A Metal Roof In Richmond
Five decisions in work order, from the first panel we step on to the topcoat.
- On The Roof
Inspect Your Roof
Every panel run gets walked. We test screws, press on rust at end laps and eaves, and check the panel undersides from inside for daylight and drip stains.
- Prep
Clean Or Replace The Steel?
Power washing strips chalk, dirt and loose rust. Panels that flex or crumble when pressed get cut out or covered with new steel before primer.
- Fasteners
Which Screws Stay?
Spinning and backed-out screws come out and larger ones go in. Tight screws get cleaned, and every head gets sealant or a cap.
- Seams
How Are The Laps Detailed?
Each lap is cleaned, dried and primed, then sealant is brushed in, polyester fabric is set into it, and more coating covers the fabric.
- Coating
How Thick Is The Coat?
Base and top coats go on to the thickness the product sheet specifies, and film build is checked as the crew moves across the roof.
Related Services
Related Roof Coatings
Some metal roofs need more than a coating over the panels. These systems handle standing water, steep slopes and bare, uninsulated buildings.
Silicone Roof Coating
Low-slope metal where water sits at end laps or behind units for a day or more after rain.
Richmond Silicone Roof Coating
Acrylic Roof Coating
Pitched metal roofs on shops and barns that shed water fast and get plenty of warm, dry days.
Richmond Acrylic Roof Coating
Spray Foam Roofing
Bare metal buildings that drip condensation, where foam over the screws adds insulation and a smooth surface.
Richmond Spray Foam RoofingFAQ
Metal Roof Coating Questions
Answers about panels, screws and rust on commercial metal roofs in Richmond.
Question about your own roof?
Call UsIs coating a metal roof the same as painting it?
No. Paint is a thin film for color, while a roof coating is a thick elastomeric layer that stretches as the steel heats and cools.
That daily movement loosens screws and opens laps, and a paint film cracks right at those joints. A coating is built to a measured thickness and paired with fabric or tape at laps, ridge caps and skylight edges.
Can you coat over rust on a metal roof?
Yes, over surface rust, once it is cleaned and primed with a rust-inhibiting primer. Metal rusted clear through gets new steel first.
Red rust on steel loses its loose scale to a wire brush or grinder. White rust on galvanized panels is cleaned off so primer reaches the zinc. Pinholes at laps or along the eave get patches or new panels.
What happens to old screws and washers?
Each exposed fastener gets checked, since dried rubber washers are one of the most common leak points on R-panel roofs.
Screws that spin, back out or sit on cracked washers are replaced, often with a slightly larger size that bites fresh metal. The rest are cleaned, and every head is sealed with elastomeric sealant or a cap before the base coat.
How are side laps and end laps sealed?
With a reinforced detail layer before the full coating goes on, because laps are where water runs sideways under the metal.
The lap is cleaned and dried, rusted edges are primed, sealant or base coat is brushed into the joint, fabric or seam tape is set in, and more coating covers it. Open seam ends on standing seam get the same care.
Do you need to get inside the building?
For a short walk, yes. The panel undersides show rust, daylight at screw holes and drip stains that the top of the roof hides.
Someone with keys to the shop or warehouse is enough, along with a clear path along the walls under the roof.
Ready To Seal Your Metal Roof?
Send the roof size and address for a free estimate, or call to talk through screws, laps and rust on your building.