Screw Down Metal Roofing Panels: Pros, Cons, and When They're the Right Fit
Screw down metal panels—also known as exposed fastener metal roofs—are one of the most common and budget-friendly metal roofing options available. But while they’re affordable and fast to install, they aren’t the best fit for every home or business.
Let’s break down where screw down metal roofing shines—and where it falls short—so you can make the right decision for your property.
What Is a Screw Down Metal Roof?
Screw down panels are metal roofing panels attached directly to the roof deck using exposed screws and fasteners. You’ll see the screw heads on the surface of the panel—hence the term “exposed fastener.”
Common panel types include:
R-Panel
U-Panel
Corrugated
These systems are typically installed over solid decking with underlayment or vapor barrier, and they're best suited for simpler roof designs.
Pros of Screw Down Panels
1. Lower Upfront Cost
Screw down panels cost significantly less than standing seam systems. This makes them attractive for sheds, garages, barns, and budget-conscious residential builds.
2. Faster Installation
With fewer components and straightforward fastening, installation time is quick—sometimes just 1-2 days for average-sized homes.
3. Readily Available Materials
Most roofing suppliers in Colorado and Georgia keep common screw down panels in stock, especially in popular colors and gauges.
Cons of Screw Down Panels
1. Thermal Movement Problems
Because the screws go directly through the panel into the structure, the metal has limited room to expand and contract. This can cause:
Panel warping or oil canning
Loosened or backed-out screws
Leaks around the fasteners over time
Colorado’s wide temperature swings can amplify these issues.
2. More Maintenance Required
The rubber washers on the screws can dry out or fail, especially after 5-10 years. This often leads to leaks. Periodic inspection and resealing (or screw replacement) is required.
3. Limited Lifespan Compared to Standing Seam
While screw down roofs can last 20-30 years with proper maintenance, standing seam systems can exceed 40-50 years with less upkeep.
When Are Screw Down Panels a Good Choice?
Screw down roofs can be a smart choice when:
The building has a simple roof layout (single slope or gable)
You want a metal roof but need to keep costs down
The structure isn’t climate-controlled (barns, garages, porches)
The building is in a mild climate with fewer freeze-thaw cycles (Georgia more than Colorado)
Not Ideal For:
Complex rooflines with lots of valleys or penetrations
High-end homes looking for long-term performance and aesthetics
Heated/cooled buildings in Colorado with extreme temperature swings
Alternatives: Standing Seam Metal Roofing
If you’re planning to stay in your home long-term or want the best performance in tough weather, a standing seam metal roof is worth the extra investment. It uses hidden fasteners and floating clip systems that accommodate metal expansion, reducing maintenance and leaks.
FAQ
How long do screw down metal roofs last?
With good maintenance, about 20–30 years. But regular inspections are key.
Do screw down panels leak?
They can if fasteners back out or washers fail. Regular checks help prevent this.
Can screw down metal roofing be installed over shingles?
Yes, but it depends on local codes, roof condition, and building use. Always check with a local pro.
Need Help Choosing the Right Metal Roof?
At Roof Nuts, we install and service all types of metal roofing across Colorado and Georgia. Whether you’re considering screw down panels or standing seam, we’ll help you choose the right option for your climate, budget, and long-term goals.
Call us today to schedule your free roof consultation:
Colorado: 303-276-2403
Georgia: 404-476-6851
