Metal Roofing Panels
Metal Wall Panels/Siding
Roofing Underlayment
Flat Sheets/Coil
Metal Purlins
Accessories
MS2® 2" Deep Mechanically Seamed
Single Lock or Double Lock
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Product Data
PRODUCT DATA
Material Type:
Mechanical Seam Metal Panel
Rib Height:
2"
Overall Width
Standard: 12", 16", 18"
Custom Widths Available: 12"-24"Available Gauges
24/Standard
22/Custom OrderedSubstrate:
AZ50 Minimum (aka Galvalume®/Zincalume®)
Finishes:
PVDF Resin Based (AKA Kynar 500®/ Hylar 5000®)
Fasteners:
Concealed
Panel Length:
1' to 52'
Recommended Minimum Roof Slope:
1/12
Installation
Installation over a solid substrate with an underlayment between the panel and the substrate.
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Product Specifications
PRODUCT SPECIFICATIONS
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Features & Benefits
Features & Benefits of Standing Seam Metal Roofing
- High Seams - High seam panels have a greater benefit versus a lower seam panel for moisture penetration. Seams also known as ribs are raised to prevent water penetration and help prevent water leakage into the interior, and diverts water down the roof to a drain point.
- Fasteners/Clips – Western Lock standing seam has a concealed clip system and is one of the most durable and weather resistant roofing system available.
- Fewer Seams - Because the metal panels run unhindered from the top to the bottom of the roof, not only are there no horizontal seams but, in total, the roof has a fewer number of seams.
- Corrosion & Rust Resistance – Our metal roofing and siding panels and sheet steel products are coated with an aluminum-zinc alloy coating (AKA Galvalume®/Zincalume®). This creates extraordinary outdoor corrosion resistance.
- Durable - Metal Roofing coated with an aluminum-zinc alloy coating (AKA Galvalume®/Zincalume®) will have an exceptionally long life expectancy.
- Pest and Termite Resistant - Bugs, pests, and termites cannot penetrate through metal materials making a standing seam metal roofing system your best defense against unwanted creatures.
- Fire Resistant - Metal roofing and metal wall systems are noncombustible. They have a Class A fire rating. Class C rating when applied over a combustible material such as wood shingles.
- Wind Resistant - Metal roofing can withstand powerful wind gusts.
- Lightweight - Lightens the load in installation and reduces the load bearing weight on support walls and beams.
- Stylish – Available in various colors and can be ordered in a variety of premium specialty finishes. Standing seam roofs are perfect for certain types of contemporary or country-style houses. Due to the smooth, straight lines, these roofs give your house a stunning appearance with a modern flair.
- Energy Efficient - Metal roofs with a "Cool" paint finish reflect solar radiant heat, which can help reduce cooling costs.
- Eco-Friendly - Metal roofing is made from recycled content. Western Lock standing seam panels are also recyclable at the end of their life as a roof. In contrast, most shingle tear-off waste ends up as part of the building-related waste stream - up to 20 billion pounds per year.
- High Seams - High seam panels have a greater benefit versus a lower seam panel for moisture penetration. Seams also known as ribs are raised to prevent water penetration and help prevent water leakage into the interior, and diverts water down the roof to a drain point.
- Install Guide
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Trim/Flashings
Trim and Flashings
Please click here to see available trim and flashings for standing seam. -
Clip Detail
Clip Detail - Western Lock Standing Seam
For more detailed information, please feel free to download the available documents below.
Clip Detail - Western Lock Standing Seam
- Stiffening Ribs
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Engineering Info
Engineering Info Request
Please call for more information 1-877-787-5467 or email us at sales@metalforroofing.com. -
CAD Details
CAD Drawings for Download
- Color Charts
- Solar Reflectivity Index
- Paint Warranties/Specs
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General Information
GENERAL INFORMATION
Download the general information sheets by clicking on an image below. - Roofing Underlayment
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Request a Color Chip
Request a Color Chip
Please click here to request a sample color chip. -
Request a Quote
Request a Quote
Please click here to request a quote.

MS2® 2” Deep MECHANICALLY SEAMED
SINGLE LOCK OR DOUBLE LOCK
Mechanically fastened standing seam metal roofing can be mechanically seamed to either a single lock or a double lock condition. The most commonly used mechanical standing seam panel is the double lock system. MS2 with a double lock seam condition can handle low slope roof greater than 1” in 12”. If you have a slope that is greater than 1:12 and less than 3:12 this would be an excellent concealed fastened roof panel. The single locking condition is not as commonly used as the double locking condition and used on a 3/12 or greater slope roof. The MS2 is a better fit amongst all hidden fastened metal panels for roof slopes less than 3:12. You will need to rent a seaming tool. MS2 comes with clip relief ribs. Striations or stiffening ribs can be added to the panel to lessen the chance of oil canning.
WHAT IS A MECHANICALLY SEAMED CONCEALED FASTENED PANEL?
Mechanically seamed panels are 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.Single Lock (90-degree seam) Quick Facts
- Single lock refers to ONE fold of the seam (or 90 degrees).
- While single lock profiles won’t perform as well as a double lock, single lock still performs well in milder environments. Again, check to make sure the engineering allows a single lock to be used.
- Single locked systems require less labor, and it’s easier to replace a damaged panel than double lock profiles.
Double Lock (180-degree seam) Quick Facts
- Double lock mechanical systems feature TWO folds of the seam (to achieve 180 degrees).
- Double lock systems are suitable for low-slope applications needing extra weather-tightness.
- 2-inch double lock profile: Can generally be installed down to a .5/12 pitch with in-seam sealant (based on geography).
- 1.5-inch double lock profile: Can generally be used down to a 1/12 pitch with in-seam sealant (based on geography).
- Double lock panels perform better; plus, there is less of a chance for panels to come un-seamed.
- For properties in cold weather areas with freezing and thawing, double lock systems are good choices. As snow/ice freezes and thaws, it also expands and contracts, which could potentially disengage a snap-lock profile.
- Double lock panels are more labor-intensive to replace.
- When possible, you should use an expansion clip with a mechanical lock profile.
More Options for Standing Seam Systems
Striations or Stiffening Ribs
Striations, also called stiffening ribs or rib rollers, are the “patterns” roll formed into a metal roofing panel between the seams. These can be used to assist with the installation of a metal roof, to help reduce the visibility of oil canning, or just for curb appeal. In fact, we recommend using striations in standing seam panels, some available options include:
- Flat – No indents between the clip relief ribs
- Striated – Small consistent indentation lines in the panel
- Ribbed – Shapes or indentations between the seams
- Pencil – Circular panel indents
- V-Ribs – “V” shaped panel indents
- Bead – Longer, rectangular panel indents
- Clip relief – A stiffening rib adjacent to the seam that allows the space for a clip underneath
ORDERING INFORMATION
Excellent customer service is important to us. When you place your order with Western States Metal Roofing you can expect the following:
- Knowledgeable Sales Associates - Helpful and friendly sales associates that will answer all of your questions.
- Made to Order Panels - We cut your metal roofing and metal siding panels to the exact lengths needed.
- Fast Turnaround - Typical two week lead time. However, if you need it quicker, we normally can accommodate just about any completion schedule.
- Shipping Convenience - We have route trucks that service anywhere in the USA and Canada.
- Affordable Shipping - Immediate and inexpensive shipping.
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Colors & Finishes
Click color chip to enlarge
Kynar®/PVDF Paint Finish
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Galvanized G90
Copper
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Kynar®/PVDF Paint Finish
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Standard Colors Galvalume®/Zincalume®
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Distressed Wood Series Real Rusted Roofing Specialty Paint Finishes - Vari-Cool® Color Changing Paint System Perforated Metal Finishes
Have a specific color in mind? Not a problem. We provide custom colors in about any color you can imagine. Minimum quantities and lead times may vary. Please contact us for more information.
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