If you're fastening metal roofing panels to wooden structures, you need the right screw for the job. Metal roofing screws are not the same as standard wood screws, and using the wrong fastener can lead to leaks, rust, and early failure of your roof. This guide walks you through what matters when selecting metal roofing screws, so you can feel confident about your choice.

Understanding Metal Roofing Screws and Why They Matter

Metal roofing screws are engineered specifically for joining metal panels to wooden or metal substrates. The key difference between these and regular wood screws lies in their design: metal roofing screws have a sharp, self-starting point that pierces metal without requiring a pilot hole, and they include a built-in washer to distribute pressure and prevent water penetration.

The Jake Sales 10 x 1-1/2" Antique Bronze Metal Roofing Screws are designed for exactly this purpose. The #10 designation refers to the shaft diameter, while the 1-1/2" measurement indicates the total length of the screw under the head. This particular size works well for standard residential metal roofing applications where you're fastening through metal panels into wooden roof structures.

The Importance of the Washer and Coating

One of the most critical features of metal roofing screws is the washer. The Jake Sales screws come with a 1/2" EPDM washer, which is a synthetic rubber that compresses under the screw head and creates a watertight seal. EPDM (ethylene propylene diene monomer) remains flexible in temperature extremes and resists UV degradation, making it ideal for outdoor roofing applications.

The hex washer head design with a 1/4" head size provides good grip for your driver and distributes clamping force evenly across the washer. The screws are painted with a two-part polyurethane coating in antique bronze to match many popular metal roofing colors, though minor color variation between batches is normal. They're also galvanized underneath the coating for additional corrosion resistance, which extends the life of your fasteners in wet or salty environments.

Size and Quantity: Working Out What You Need

The 1-1/2" length works for roofing applications where panels are fastened directly to wooden framing. If your wooden substrate is thicker or you're installing into purlin members with additional thickness, you may need longer screws. Conversely, if you're fastening thin metal-to-metal with wood backing, this length is appropriate.

The 250-count bag means you have 250 individual screws in one package. A typical residential metal roof might use 8 to 12 fasteners per sheet, depending on sheet width and local wind-load requirements. Calculate your total panel count and multiply by the fasteners per sheet to determine how many bags you'll need. It's wise to order slightly more than your estimate to account for mistakes or future repairs.

Preparing for Installation and Common Mistakes

The T17 type point on the Jake Sales screws is sharp and self-tapping, meaning it cuts its own pilot hole in metal. You don't need to drill ahead of time for metal panels, though some roofers prefer to mark fastener locations with a marker or chalk line for consistent placement.

A common mistake is overtightening these screws. The EPDM washer is designed to compress slightly and then stop; over-driving the screw can crush the washer and actually reduce its sealing effectiveness. Use a power driver with a clutch setting or drive by hand until the washer is snug and the screw stops turning easily. For #10 screws with a 1/4" hex head, the fastening point should look consistently dimpled but not crushed.

Another error is mixing screw types or brands across the same roof. This creates inconsistent sealing and makes future repairs confusing. Stick with one product throughout your project.

Long-Term Care and Replacement

Metal roofing screws, when properly installed, typically last as long as the roofing panels themselves—often 20 years or more. The galvanized core and polyurethane coating on Jake Sales antique bronze screws are designed to resist rust and UV damage throughout this lifespan. Inspect your roof annually for any raised or corroded fasteners and replace them if the washer has compressed beyond recovery or the coating has failed.

Keep a small reserve of the same Jake Sales 10 x 1-1/2" screws for future touch-ups. Storing them in a dry place ensures they remain in good condition until needed. If your roof has been exposed to extreme weather or salt air, a quick visual inspection every few years helps catch any fastening issues early.

The product in this guide: 10 x 1-1/2" Antique Bronze Metal Roofing Screws - Hex Washer Head- Self-Starting/Tapping - EPDM Washer. 1 x 250 Count Bag - 250 Screws