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Posted by McElroy Metal ● Mar 9, 2023 1:00 PM

Through-Fastened vs. Standing Seam Metal Roofing: A Comparison

Metal roofing has become increasingly popular as a durable and long-lasting roofing option. Two of the most common types of metal roofing are through-fastened and standing seam roofing.

Both options have pros and cons, so it's important to understand the differences between them to choose the best one for your needs. In this blog post, we compare and contrast through-fastened metal roofing to standing seam metal roofing to help you make an informed decision.

Through-Fastened Metal Roofing

Through-fastened metal roofing, also known as screw-down metal roofing, is a traditional roofing method where the panels are attached to the roof deck or purlins with screws  driven through the panels and into the substructure. The screws include a metal cap and washer which together provide a secure, weather-tight seal. This type of roofing is relatively easy to install and is less expensive than standing seam roofing.

One of the biggest advantages of through-fastened metal roofing is its cost-effectiveness. Since the panels attach with screws, the installation process is less complicated and requires less labor. Additionally, through-fastened metal roofing is available in a variety of profiles and colors, providing both residential and commercial building owners plenty of options.

However, through-fastened metal roofing has some disadvantages as well. One of the main drawbacks is that the hole around the screw can become larger over time due to expansion and contraction of the metal roof panels caused by temperature changes. While this phenomena is rare in panels below 30', it can become problematic on longer length panels.  With that said, it typically takes a couple of decades to occur and is easily remedied by installing a new oversized fastener.  

Standing Seam Metal Roofing

church roofStanding seam metal roofing has recently gained popularity. Instead of using screws to attach the panels, standing seam roofing attaches to the roofing substructure with either clips or through a prepunched fastening flange. This type of roofing is more expensive than through-fastened roofing but is also generally regarded as being more durable and long-lasting.

One of the most significant advantages of standing seam metal roofing is its durability. Since there are no screws that can potentially expand and contract over time, this type of roofing is less prone to leaks and is generally more resistant to wind damage. Additionally, the interlocking panels provide a sleek and modern look that can increase curb appeal.

However, standing seam metal roofing also has some drawbacks. One of the main disadvantages is its cost. Since the installation process is more complicated and requires more experienced labor, standing seam metal roofing can be significantly more expensive than through-fastened roofing.  Read this to learn other reasons why standing seam panels cost more than exposed fastened panels.

Which One Should You Choose?

The choice between through-fastened and standing seam metal roofing ultimately comes down to your budget, desired aesthetic, appetite for maintenance, and location. If you're looking for a cost-effective roofing option and don't mind a traditional look, through-fastened metal roofing may be the best option for you.

However, if you're willing to invest more money upfront, standing seam metal roofing may be the better choice.

Both through-fastened and standing seam metal roofing have pros and cons; the right choice ultimately depends on your specific needs and preferences. No matter which option you choose, McElroy Metal offers high-quality metal roofing products that can provide long-lasting protection for your home or business.

McElroy Metal is a leading metal roofing, siding, and substructural components manufacturer. With over 60 years of experience in the industry, we have built a reputation for producing high-quality, durable products that are backed by exceptional customer service. Our product line includes both through-fastened and standing seam metal roofing options, as well as a wide variety of profiles and colors to choose from.

Learn everything you need to know about Residential Metal Roofing. Check out our metal roofing resources for inspiration and answers to your questions.

About McElroy Metal

Since 1963, McElroy Metal has served the construction industry with quality products and excellent customer service. The employee-owned components manufacturer is headquartered in Bossier City, La., and has 14 manufacturing facilities across the United States. Quality, service and performance have been the cornerstone of McElroy Metal’s business philosophy and have contributed to the success of the company through the years. As a preferred service provider, these values will continue to be at the forefront of McElroy Metal’s model along with a strong focus on the customer.

Topics: Metal Roofing, Standing Seam Systems

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