Metal Roof Panels & Wall Panels

The best choice depends on roof slope, panel length, material, attachment requirements and installation details. Mechanical lock, snap lock and nail strip close and fasten differently. Compare the specific system requirements and drawings rather than choosing solely by appearance or seam height.

Standing-seam systems generally conceal the panel attachment within the seams or beneath the adjacent panel. Exposed-fastener systems typically attach through the panel face. These arrangements have different detailing and maintenance needs. Concealed attachment does not eliminate the need to weatherproof roof edges, penetrations and other connections.

They are different seam-closing configurations for a mechanical-lock panel. The first fold forms the single lock; an additional fold produces the double lock. Use the configuration specified for the roof assembly, material and conditions. Do not substitute one for the other based only on appearance.

Snap-lock panels avoid the separate mechanical seam-closing operation along the panel joints, which can reduce that part of the installation work. Layout, clips, flashing, cutting and roof details still require appropriate skills. A simpler seam does not make every roof suitable for a DIY installation.

Nail-strip panels have a concealed fastening flange formed into the edge. Clip-attached snap-lock panels use separate clips. Both have snap-together seams, but their attachment and movement provisions differ. Follow the chosen system’s fastening and length requirements; thermal movement matters even on shorter panels.

K&M can review curved mechanical-lock panels and custom tapered-panel requests. Availability depends on the profile, material, dimensions and required geometry. Send a drawing with the radius or taper and panel lengths. The standard snap-lock profile described here is intended for straight runs, not curved roof surfaces.

Yes, with the appropriate assembly and material. K&M’s flat-roof flat-lock applications require soldered seams and a suitable solderable metal; pre-tinning of edges is available. Painted aluminum and steel can be considered for suitable wall applications, where the attachment, backing and water-management details must also be specified.

There is no single minimum that applies to every metal panel. Confirm the requirement for the exact profile, seam configuration and complete roof assembly. Seam height alone is not enough to determine suitability. Include the roof slope with your request, especially for low-slope work or roofs with end laps.

Oil canning is visible waviness in a panel’s flat areas. Lighting, viewing angle, width, thickness, handling and installation can affect its appearance. Ribs or striations may help reduce its visibility, but do not guarantee that it will be absent. Discuss appearance expectations before ordering.

Coil width is the width of the flat material before forming. Some of that width becomes the seams or fastening flange. Finished coverage is the width used for panel layout. For example, the listed 1-inch mechanical-lock profile uses about 3 inches in forming, so 20-inch stock provides about 17 inches of coverage.

Options vary by profile and may include copper, zinc, aluminum, steel and coated copper materials. Kynar refers to a coating resin brand, not the underlying metal. Specify the base metal, thickness and finish, and confirm availability for the panel you need. Coastal exposure and softer metals require particular attention to system suitability.

The Mechanical Lock and Snap Lock online listings specify 3- to 20-foot panels for shipping and lengths up to 40 feet for pickup. Custom profiles and special arrangements must be reviewed separately. Confirm the length, transport and unloading requirements before placing the order.

The Mechanical Lock and Snap Lock online listings use lineal feet and specify a 100-lineal-foot minimum. Provide the quantity and length of each panel, then add those lengths for the total. Other profiles or custom work may be quoted differently. Installed area also depends on finished coverage width.

The project may require compatible clips or fasteners, underlayment, closures, eave and rake trim, ridge caps, valley flashing, wall flashing and penetration details. Mechanical seaming or soldering may require additional tools. Coordinate these items with the specified assembly rather than assuming the panels alone form a complete roof.

Contact K&M with the specific standard and project requirements. Available documents must be checked against the actual profile, material, thickness, coverage, substrate and attachment. A reference to a test standard does not mean every panel configuration has the same tested performance or approval.

Send the profile and seam height, finished width, material and finish, quantities and cut lengths, roof slope or wall application, and any required drawings or test criteria. Include the delivery location or pickup preference and requested schedule. Provide dimensions for curved, tapered and flat-lock work.

K&M panels are made to order. Preparation time depends on the material, profile, quantity, fabrication requirements and production schedule. Confirm the estimated timing for your order and allow additional time for transit. Shipping availability depends on panel size and destination.