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Corrugated metal roofing screws fasten exposed metal roof and siding panels while helping each panel stay secure and weather-ready. Under the panel, the framing material plays a big role: Wood, steel, oriented strand board, plywood, and older repair holes each call for a screw that fits the job.
Supply Maverick stocks metal roofing screws and fasteners for contractors, crews, and DIYers who know even one wrong screw can slow down a project. Many roofing and siding fasteners come in 250-count bags, with bulk pricing shown on qualifying product pages, and most orders placed before 12 noon EST ship the same day.
| Project type | Fastener to start with | Supply Maverick option |
| Corrugated panels over wood framing | Metal-to-wood screws with an EPDM washer and wood-gripping threads | #11 PG Hi-Lo EPDM Washered Metal Roofing/Siding Fasteners or Fastgrip #10 Hi-Lo MINI-DRILLER EPDM Washered Metal Roofing/Siding Fasteners |
| Corrugated panels over steel framing | Self-drilling metal-to-metal screws with the correct drill point | #12 MetalGrip T5 Self Drilling Roofing/Siding Fasteners |
| Roof repair or enlarged old holes | Replacement roofing screws with a stronger bite | #14 FastGrip Replacement Metal Roofing/Siding EPDM Washered Screws |
| Exposed screw heads | Painted or mill-finish hex head screws matched to the panel system | Choose the screw type first, then compare the available color options |
| Contractor-size orders | 250-count bags with available quantity breaks | Review product pages for bulk tiers |
A corrugated panel may look simple once it’s on the roof, but the screw is doing more work than it gets credit for. It has to not only pull the panel tight but also grip the material below it and compress the washer well enough to help seal the hole.
Start below the panel. A wood frame needs a metal-to-wood screw; steel purlins need a self-drilling metal-to-metal screw; and on older roofs, where the original holes have widened or the old fasteners have backed out, a replacement screw can give the repair a cleaner bite.
The washer deserves attention before the driver ever touches the screw head. Ethylene propylene diene monomer (EPDM) washered screws are common on exposed metal roofing because the washer compresses under the head and helps seal the fastener point. A crushed washer is as much of a problem as a loose one, so controlled driver pressure, especially on painted fasteners, is crucial.
Metal-to-wood and metal-to-metal screws are designed for different fastening conditions, and a mismatch can make the panel harder to fasten and reduce holding power.
| Framing or substrate | Fastener guidance | Supply Maverick product note |
| Wood framing | Use a metal-to-wood screw with threads that bite into wood, along with an EPDM washer for sealing. | The #11 PG Hi-Lo fastener uses a mini self-driller tip made to punch through steel panels and into wood. |
| Oriented strand board or plywood | Use a fastener designed for high pull-out resistance in wood-panel substrates. | The #14 FastGrip replacement screw is ideal for oriented strand board and plywood, with a design suited to metal-to-wood repair work. |
| Steel purlins or steel framing | Use a self-drilling metal-to-metal screw with a drill point rated for the steel thickness. | The #12 MetalGrip T5 uses a #5 self-drilling point and is rated for drilling up to 0.5-inch-thick steel. |
| Existing metal roof repair | Use a replacement screw sized to grip worn or enlarged holes. | Replacement fasteners, such as the #14 FastGrip, can help with roof and siding repair where standard screws may no longer bite cleanly. |
For exposed fastener metal roofing, the washer is part of the roof’s sealing system. Supply Maverick roofing and siding fasteners include EPDM washer options across product lines such as the #11 PG Hi-Lo, the #12 MetalGrip T5, and the #14 FastGrip replacement screw.
A seated washer should look compressed against the panel, yet it should still keep its shape. Too little pressure can leave room for water to work under the washer; too much pressure can deform the washer and weaken the seal. This is one of the easiest places to get a better result without buying a different product, so take your time.
Screw size and length should be chosen around the panel profile, the washer, and the material below the panel. Common metal roofing screw diameters include #10 and #12, though the right size still depends on the panel system and the substrate.
Hex washer head screws are common on exposed corrugated metal roofing because they drive cleanly and pair well with sealing washers. Low-profile pancake screws belong in a different category, usually clip or concealed-fastener work. If the project uses standing seam clips, choose pancake screws rather than exposed corrugated roofing screws.
Painted fasteners help the screw head blend into exposed roof and wall panels. Mill, galvanized, or unpainted finishes may be better suited to jobs where appearance matters less or where the project calls for a non-painted fastener.
Color names are generic, so compare the available Supply Maverick options against the panel color before ordering, as screens, panel batches, and manufacturer color names can vary. If the roof or wall panel came through Supply Maverick, choose the fastener color that matches the paint inventory.
Corrosion resistance also factors into the buying decision. Roofing fasteners sit through rain, snow, heat, and freeze-thaw cycles. Mechanically galvanized finishes and anti-corrosion coatings, such as the #11 PG Hi-Lo and the #14 FastGrip replacement screw, are top choices for weather resistance.
Supply Maverick carries corrugated metal roofing screws for standard panel fastening, steel-to-steel work, and roof repair. Use this table as a starting point, then confirm the size, color, and application on the product page before ordering.
| Product | Best use | Key details |
| #11 PG Hi-Lo EPDM Washered Metal Roofing/Siding Fasteners | Metal roofing and sidewall panels over wood framing | #11 hi-lo thread, mini self-driller tip, 1/4 inch hex washer head, 5 mm galvanized EPDM bonded washer, mechanically galvanized coating, and 250 pieces per bag. |
| #12 MetalGrip T5 Self Drilling Roofing/Siding Fasteners | Heavy-duty steel-to-steel applications | #5 self-drilling point, drilling capacity up to .5 inch thick steel, 5/16 inch hex head, 15 mm galvanized EPDM washer, 17 colors, and 250 pieces per bag. |
| #14 FastGrip Replacement Metal Roofing/Siding EPDM Washered Screws | Metal-to-wood replacement work, oriented strand board, and plywood | Type 17 drill point, 5/16 hex head, mechanical galvanized finish, 14 mm galvanized EPDM washer, strong pull-out resistance, and 250 pieces per bag. |
| Fastgrip #10 Hi-Lo MINI-DRILLER EPDM Washered Metal Roofing/Siding Fasteners | Standard corrugated metal roofing and siding fastening | A practical metal-to-wood option for exposed roofing and siding projects where a #10 fastener fits the panel and substrate. |
Screw placement on corrugated metal roofing changes by panel profile, framing layout, roof or wall use, and the manufacturer’s fastening pattern. Depending on the roof system, screws may be placed on the crest corrugation or on the flat section of the panel.
For quantity, treat any general number as an estimate. 80 screws per 100 square feet is a common planning average, plus extra fasteners for trim, flashing, and panel sidelaps. The final count should follow the panel manufacturer’s pattern, the project layout, wind exposure, and local requirements.
If you’re unsure where to fasten the panel, start with the panel manufacturer’s installation guide. A qualified local installer can also confirm the roof pitch pattern, panel style, and framing.
Supply Maverick is the e-commerce division of Mid-Michigan Metal Sales and provides customers with a practical source for hard-to-find metal roofing and siding supplies, backed by people who work with metal building products every day.
If you already know the screw size and substrate, you can order fast. If you’re choosing between metal-to-wood, metal-to-metal, or replacement screws, the team can help you narrow it down before you buy.
You’ll find roofing fasteners in job-friendly quantities, with wholesale pricing and bulk-quantity discounts on qualifying products. Net 30 accounts are available for online purchases as well. Supply Maverick ships across the United States, Canada, Australia, and New Zealand, so the right fasteners don’t have to be hard to find.
Use screws made for exposed metal roofing, then match the screw to the substrate. Metal-to-wood roofing screws are used for wood framing, oriented strand board, or plywood. Self-drilling metal-to-metal screws are used for steel purlins or steel framing. EPDM washered screws are a common choice because the washer helps seal the fastener point.
Yes. Roofing screws are made for outdoor metal panels and often include sealing washers, corrosion-resistant coatings, plus points or threads matched to wood or steel. Regular construction screws aren’t built to seal exposed metal roofing panels.
Choose metal-to-wood screws when corrugated panels fasten into wood framing, oriented strand board, or plywood. Choose metal-to-metal screws when panels fasten into steel framing or steel purlins.
Follow your panel manufacturer’s installation guide. Depending on the panel system, screws may be placed on the crest corrugation or on the flat part of the panel. Supply Maverick’s guide on where to place screws on metal roofing explains this in more detail.
Start with the manufacturer’s fastening pattern. For rough planning, 80 screws per 100 square feet, plus added screws for trim, flashing, and sidelaps, is the norm.
The EPDM washer compresses under the screw head to help seal the fastener point against water entry. Correct driver pressure matters because an underdriven screw may leak, while an overdriven screw can damage the washer.
Yes, as long as the screw type is compatible with the substrate and panel system. Painted screws can help the fastener head blend with exposed panels, but be aware: Color names are generic, so compare available Supply Maverick options before ordering.
Yes. Many Supply Maverick roofing screws are sold in 250-count bags, and qualifying product pages show bulk-quantity pricing tiers.
