What Is Standing Seam Metal Roofing?
Standing seam metal roofing is defined as 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 panel’s flat area. Standing seam systems can be used for either metal roofing or metal walls.
The main idea 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 (fastener flange).
Waviness in the panel referred to as “oil canning” may occur and is inherent to this type of panel and is not a cause for rejection. Narrow widths, striations, lighter colors, and heavier gauges minimize “oil canning”.
Standing Seam Profile Types
Standing seam metal roofs offer a wide range of options including: color, width, height, profile, thickness, etc. When choosing a panel, it is important to identify the profile most suitable for the project.
RM Metal Roofing Supply offers the following varieties of Standing Seam Profiles:
Fastener flange, snaplock, single-lock, and double-lock mechanical seam.
Snap-Lock Profiles:
*RM 175, Berridge Cee-Lock
Snap-lock profiles have panels with edges that snap together without needing hand or mechanical seaming. They attach to the roof deck with clips that fasten beneath the panel. Unlike fastener flange panels, true snap-locks allow the system to float freely.
Mechanically Seamed Profiles:
*RM 200 (Single and Double-Lock), Berridge Zee Lock (Single and Double Lock)
Mechanically seamed panels have edges that align and are locked together by bending the edges with a hand or mechanical seamer. There are two types: Single lock (90-degree seams) and double lock (180-degree seams).
Nail Flange, Nail Strip or Fastener Flange Profiles
*RM 100
Nail flange profiles are similar to snap-lock systems but are directly fastened to the roof deck through the male leg of the panel. The female leg snaps over the male leg, hiding the fastener head.
PBR/R Panel - Exposed Fastener
- Availability:
- 26 Gauge Painted Galvalume (40 Yr. Warranty)
- 26 Gauge Bare Galvalume (25 Yr. Warranty)
- Specs:
- Ribs: 1.1/4″ Tall, 12″ on Center
- Overall Coverage: 36″
- Fastening System: Screw Through
- Substrate: Works Best on Solid Substrate or Purlins 72″ o/c or Less
- Common Uses:
- Commercial Steel Frame Buildings (Roofing and Siding)
- Agriculture Buildings (Roofing and Siding)
- Home Roofs
- Interior Wall Panels
RM 100 SL
1" Clipless Standing Seam
An economic choice for wood deck applications. This panel requires a solid substrate such as plywood with 30# felt or better underlayment under the panel.
The RM 100 SL standing seam panels are minimum 24-gauge galvalume steel panels. The steel roof panels have a maximum coverage of 16". The panel has a 1" tall snap lock standing seam rib with a nail fastener flange with 1" x 1/4" slots at 5-3/16" on center. The 24-gauge steel material is ASTM A792 AZ 50 or AZ-55, Grade 50 with a minimum 50 ksi yield point with optional painted finishes.
Panel Information:
Panel Type: Standing Seam
Panel Seam: Snaplock
Panel Width: 16”
Seam Height: 1.0”
Panel Material: 24 Gauge Steel
Panel Surface: Smooth/Embossed Optional
Panel Clip: None
Minimum Slope: 3/12
Substrate: Plywood min 15/32”
Texas Department of Insurance: RM 100 SL Product Evaluation: RC-658
“Profile Uses, Engineering, Installation Tips, & More”
Content courtesy of Sheffield Metals and covers their comparable panel to the RM 100 SL
Sheffield Metals 1.0” Fastener Flange SnapLock - Panel Profile
RM 175 SL
1.75” Standing Seam
The RM 175 SL is a snap lock standing seam steel roof system for wood or metal deck application. The 24-gauge steel material is ASTM A792 AZ-55, Grade 50, with a 50 ksi yield point with optional paint finishes. The maximum height of the female rib is 1-3/4". The panel has a maximum width of 18". The panel can be formed in continuous lengths and interlocks to adjoining panels by snapping male and female legs together and fastening the panel to the deck using a concealed fastener system (clips with screws). The panel rollformer is from New Tech Machinery Corp.
Panel Information:
Panel Type: Standing Seam
Panel Seam: Snaplock
Panel Width: 16”
Seam Height: 1.75”
Panel Material: 24 Gauge Steel
Panel Surface: Smooth/Embossed Optional
Panel Clip: Required for Engineering
Minimum Slope: 2/12
Substrate: Plywood, B-Deck, B-Deck w/ ISO
Texas Department of Insurance: RM 175 SL Product Evaluation RC-662
“Profile Uses, Engineering, Installation Tips, & More”
Content courtesy of Sheffield Metals and covers their comparable panel to the RM 175 SL
Sheffield Metals 1.75" SnapLock - Panel Profile
RM 200 ML
2” Standing Seam Mechanical Lock
Mechanically seamed panel with clips for metal or wood decking applications. Produced with 24 Gauge metal, 2” Mechanically Seamed Rib Height. Available in single lock or double lock. The RM 200 ML standing seam roof panels have a maximum 18.5" of coverage. The Galvalume-coated steel conforms to ASTM A792, Grade 50, with a minimum yield strength of 50,000 psi. The panel rollformer is manufactured by New Tech Machinery Corp.
Panel Information:
Panel Type: Standing Seam
Panel Seam: Mechanical
Panel Width: 16”
Seam Height: 2.0”
Panel Material: 24 Gauge Steel
Panel Surface: Smooth/Embossed Optional
Panel Clip: Required for Engineering
Minimum Slope: 2/12
Substrate: Open Framing*, Plywood, B-Deck, B-Deck w/ ISO
Texas Department of Insurance: RM 200 ML Product Evaluation RC-663
“Profile Uses, Engineering, Installation Tips, & More”
Content courtesy of Sheffield Metals and covers their comparable panel to the RM 200 ML
Sheffield Metals 2.0" Mechanical Seam - Panel Profile
Berridge C-Lock
1.5” Standing Seam
The RM 175 SL is a snap lock standing seam steel roof system for wood or metal deck application. The 24-gauge steel material is ASTM A792 AZ-55, Grade 50, with a 50 ksi yield point with optional paint finishes. The maximum height of the female rib is 1-3/4". The panel has a maximum width of 18". The panel can be formed in continuous lengths and interlocks to adjoining panels by snapping male and female legs together and fastening the panel to the deck using a concealed fastener system (clips with screws). The panel rollformer is from New Tech Machinery Corp.
Panel Information:
Panel Type: Standing Seam
Panel Seam: Snaplock
Panel Width: 16.5”
Seam Height: 1.5”
Panel Material: 0.032 Aluminum
Panel Surface: Smooth/Embossed Optional
Panel Clip: Required for Engineering
Minimum Slope: 1/12
Substrate: Plywood, B-Deck, B-Deck w/ ISO
Texas Department of Insurance: RC-482: Cee-Lock Aluminum (Plywood or Steel Deck) Product Evaluation
Texas Department of Insurance: RC-482: Cee-Lock Aluminum (Plywood or Steel Deck) Product Evaluation
Berridge Z-Lock, Single Lock
2” Standing Seam
Crafted from robust 0.032 aluminum, the Single Lock Zee-Lock panel offers a 16-inch coverage with a 2” Rib Height and a choice between a sleek smooth finish or optional striations. The concealed fasteners ensure a clean, contemporary look, making it an ideal choice for roofing, sheet metal siding, and fascia projects.
- May be site formed in continuous lengths with the Berridge SP-21 Roll Former
- Panel is mechanically seamed in the field using the Berridge Zee-Lock Seamer in a single pass
- Continuous Zee-Rib is recommended for open framing and required for water tightness warranty
- Use Stainless Steel Zee-Lock Clip with Aluminum panels
- Optional extruded vinyl weather seal is required for open framing
- Optional Snap-On Batten Cap requires the Zee-Lock Batten Clip
Panel Information:
Panel Type: Standing Seam
Panel Seam: Mechanical
Panel Width: 16”
Seam Height: 2.0”
Panel Material: 0.032 Aluminum
Panel Surface: Smooth/Embossed Optional
Panel Clip: Required for Engineering
Minimum Slope: 2/12, 0.5/12*
Substrate: Open Framing, Solid Sheathing
Texas Department of Insurance:
RC-645: Single Lock Zee-Lock Standing Seam Steel Roof Panels Installed over an Insulated Steel Deck
Berridge Z-Lock, Double Lock
2” Standing Seam
Double-Lock Zee-Lock Panel stands as a testament to precision and durability in architectural metal panels, offering a 2-inch standing seam with a generous 16-inch coverage. This 180-degree mechanically seamed panel is designed for sheet metal siding, roofing, and fascia applications, bringing versatility and reliability to both open framing and solid sheathing installations. Crafted from resilient 0.032 aluminum, this panel is a powerhouse suitable for a spectrum of applications.
- May be site formed in continuous lengths with the Berridge SP-21 Roll Former
- Panel is mechanically seamed in the field using the Berridge Double-Lock Zee-Lock Seamer in a single pass. The double-lock seam is not available with vinyl weather seal
- Consult BMC for curving availability
- Continuous Zee-Rib without vinyl required
- Stainless steel floating clips are required for aluminum substrate
Panel Information:
Panel Type: Standing Seam
Panel Seam: Mechanical Seam
Panel Width: 16”
Seam Height: 2.0”
Panel Material: 0.032 Aluminum
Panel Surface: Smooth/Embossed Optional
Panel Clip: Required for Engineering
Minimum Slope: 2/12, 0.5/12*
Substrate: Open Framing, Solid Sheathing
