Standing Seam Metal Roofing

A metal roof is one of the best investments you can make to boost your home’s value. Delivering beauty, longevity, energy efficiency and environmental sustainability—metal roofing offers benefits for any size home or commercial building.

Out of all the metal roofing types, standing seam is becoming more popular as property owners are looking for long-lasting products, a modern look and a better way to protect their homes from Hurricane damage. Homeowners are increasingly turning to highly-durable materials, including metal roofing which gives a strong performance in severe storms.

We manufacture standing seam metal roofing and panels at our home office in Conway, SC. We will customize your order to fit your needs and your budget. Our trim and accessories are always in stock in Conway with deliveries made daily to our Florence and Moncks Corner offices.

What is Standing Seam?

Standing Seam metal roofing is a concealed fastener metal panel system that features vertical legs and a broad, flat area between the two legs. It’s also described as having raised seams, or vertical legs, that rise above the level of the panel’s flat area. Standing seam systems can be used for metal roofing – most common, or metal walls.

The main concept for standing seam systems is that the fastener is hidden, whether the panel is attached to the roof deck using a clip or is directly fastened to the decking material under the vertical leg using a fastener flange.

Standing Seam Metal Approved in Historic Georgetown SC

We proudly service Horry, Florence, Georgetown, Brunswick, Berkeley, Dorchester, and North Charleston counties.

Standing Seam Metal Roofing
Standing Seam Metal Roofing
Standing Seam Metal Roofing

Standing Seam Types & Uses

Depending on the type of roof you have on your home, how steep it is, the environment your property is in, and a variety of other factors will dictate what standing seam type you should pick – along with the help of a contractor or architect. There are different panel profiles that make up the standing seam category, including:

Nail Flange/Fastener Flange

Nail flange (also referred as a fastener flange) is similar to a snap-lock panel system, but instead of using a clip to attach the panel to the roof deck, it is directly fastened down to the deck through the male leg of the metal panel. Once the fasteners are in place, the female leg of the panel snaps over the entirety of the male leg, which hides the fastener head.


Snap-lock profiles are panels that have been carefully roll-formed with specifically shaped edges, a male and female leg, that snap together and don’t require hand or mechanical seaming during installation.

Snap-lock Quick Facts

  • Snap-lock systems should only be installed on roof pitches (slope) of 3/12 and above, unless otherwise approved.
  • Snap-lock panels can be used in any environment as long as it’s installed correctly.
  • These systems require less labor and are generally cheaper to install because no mechanical seaming is required.
  • Engineered snap-lock panel systems­ deliver known performance, unlike non-engine­ered versions.

Mechanical Lock

Mechanically seamed panels are also roll-formed with specific edges that line up with each other. Once the two panels are engaged, a hand or mechanical seamer is used to bend the edges and lock the panels together. There are two different versions of mechanical seams: Single lock 90-degree seams and double lock 180-degree seams. 

Flack Global Metals