Every Rib
A screw sits on every rib, and dried washers let water in at each one. All of them are checked and sealed. Thousands of screws can sit on one long machine shed roof.

As a Greencastle metal roof coating contractor, we seal every exposed screw on farm, ag business, and industrial roofs, treat eave rust, and then coat the panels.

Greencastle metal roof coating on farm and ag buildings is mostly screw work. Many of these roofs have an exposed screw on every rib, and each one is a possible leak. On a long machine shed, that can mean thousands of screw heads to check.
We check every screw, replace the ones with cracked washers, seal each head, and treat rust at the eaves and lower panels before coating the whole roof. Equipment and stored goods stay inside while the crew works overhead.
Ag and farm buildings around Greencastle show these five problem areas, starting with the screws.
A screw sits on every rib, and dried washers let water in at each one. All of them are checked and sealed. Thousands of screws can sit on one long machine shed roof.
Lower panels rust from splash and wet ground. Scale is removed and primer applied. Bad panels near the ground are cut out and replaced to match.
Little overhang means rust starts at the eave. Those edges are treated first. Gutters, where present, are cleared so splash stops at the eave.
Long runs on farm buildings have end laps that gap. They are stitched and sealed. Stitch screws close the gap before the lap gets base coat.
Uninsulated ag buildings drip from cold panels. Foam over the roof is an option there. Owners decide on foam once we see how much the panels drip.
Coating an ag building keeps equipment, grain, and feed dry without a tear-off, and the building stays in use during the work.
| Factor | Coating The Roof | Tearing Off And Replacing |
|---|---|---|
| Equipment Inside | Stays in place during the work. | Moved out while panels change. |
| Screws | Every one sealed under coating. | New screws with new panels. |
| Price Range | About $2.50 to $4.00 per square foot. | About $5 to $8 per square foot. |
| Rust | Primed and sealed. | Removed with the old steel. |
| Seasons | Scheduled around harvest and planting. | Bigger time window needed. |
| Condensation | Foam option over drip-prone panels. | Insulation added under new steel. |
Greencastle farm and industrial buildings pick from five systems.
Screw-down farm and ag steel with a screw on every rib.
Flat shop additions where rain ponds near the doors.
Steep ag roofs that shed water in minutes.
Buildings that drip condensation onto stored goods.
Shingled farm offices and shop fronts on the property.
Drips that line up with screw rows mean the washers have failed. Call us to have the screws checked before the next heavy rain.
Screw work takes most of the time on these roofs.

We sample screw rows across the roof, check eave and lower-panel rust, and note where condensation drips inside onto equipment or stored grain and feed.
Sample rows tell us roughly how many screws have cracked washers or have backed out. That count drives most of the price on a farm roof, so it goes into the scope.
Screws with cracked washers are replaced with the next size up, and every head across the roof is sealed before coating, row by row.
Rust at the eaves and lower panels is brushed off and primed. End laps on long runs are stitched and sealed.
Base and top coats go over the sealed roof to the specified thickness, checked with a gauge on every slope.
We take metal roof coating work in Plainfield and these towns besides Greencastle, including the farm country between them. Building elsewhere? call us or send us a message.
Warehouse and shop roofs sealed section by section each day.
Plant roofs washed of exhaust film before coating.
What Greencastle farm, ag business, and industrial owners ask about coating screw-down metal roofs.

Question about your own roof?
Call UsWe coat metal roofs on farm, ag business, and industrial buildings in Greencastle and the surrounding area. Many of these roofs have exposed screws on every rib, so screw sealing is a large part of the job.
Rust at eaves and lower panels is treated before the coating goes on, and long panel runs get their end laps sealed.
Roof size, screw count, rust treatment, and the coating system set the price. Our published range is about $2.50 to $4.00 per square foot for coating, compared with about $5 to $8 for replacement. On farm buildings the number of failed screws moves the price most, which is why the roof walk counts sample rows.
Plainfield Metal Roof Coating covers Greencastle and the farms and ag businesses around it, with the same written scope we use everywhere. Several buildings on one property can share one visit, and each roof gets its own line in the scope.
Greencastle lies west of Plainfield and inside our regular area. Call or send the address to set up a roof walk. Farm properties down long lanes are fine; just tell us where a truck and lift can park near each building.
Work is scheduled around harvest and planting so equipment can move in and out of the buildings. Late summer and the weeks after harvest are common windows, as long as the roof is dry and the weather suits the coating chosen.
Coating stops rain leaks, but drips from condensation come from warm, moist air meeting cold steel inside. If the walk shows condensation, foam over the panels adds insulation and cuts most of those drips, and we price both options side by side. Many owners start with coating and add foam to one building later.
Send the farm or building address, or call to book a roof walk in Greencastle.