Mechanical Lock Standing Seam by MWI Metal Roofing & Siding is designed to provide the most long lasting and maintenance free metal roofing for your home or commercial building. Available in G90 Galvanized Steel, Galvalume, Aluminum, Copper and Zinc. Choose your material and colour, our standing seam installation experts will roll form your metal roof to the exact specifications. Because we manufacture your roof right on site, there is minimal risk of material damage, costly errors, and heavy delivery surcharges.
What is Standing Seam?
Standing seam is a type or profile of metal roofing that is roll formed out of continuous coils of sheet metal. Standing seam roofs are easy to spot because of their distinct raised vertical seams. Each panel should run continuously from the eave at the base of the roof up to the ridge. Properly installed panels should not overlap horizontally as this would compromise watertightness. Larger roofs require the panels to be roll formed on site because they are too long to fit onto a transport trailer. The seams on a standing seam roof are engaged in one of two ways; “Snap Lock” or “Mechanical Lock”.
Why is it Called Mechanical Lock?
Mechanical Lock refers to the method of engagement of one vertical panel to the adjacent vertical panel. Also known as mechanically seamed, this standing seam is designed so that the overlapping seams of each parallel panel are permanently folded over (using a small roll forming tool) and locked into place. Mechanical lock panels are watertight and perform exceptionally well even on roofs with a very low slope.
MECHANICAL LOCK FEATURES & BENEFITS
MECHANICAL LOCK STANDING SEAM PICTURES
MECHANICAL LOCK SPECIFICATIONS
Panel Gauge: 24Ga & 26Ga.
Panel Width: 12-24”
Seam Height: 1 15/32”
Panel Length: to Specification
Finish: SMP & PVDF Matte/Low Gloss
Materials: G90 Galvanized Steel, Galvalume, Aluminum, Copper, Zinc
Installation: Direct to Deck
Minimum Pitch: 1/12
Mechanical Lock SMP Colours
SMP ASTM Data
| PROPERTY | SMP COATING TEST METHOD | SMP COATING SPECIFICATION |
|---|---|---|
| Dry Film Thickness | ASTM D 1400-94 ASTM D 1005-95 | 0.75-1.85 Mil 0.90-1.15 Mil |
| Specular Gloss | ASTM D 523-89 @ 60° | 20-35 |
| Humidity Resistance | ASTM D 2247 (100% relative humidity @ 95°) | Passes 1000 Hrs |
| Salt Spray | ASTM B 117 (5% salt spray @ 95°) | Passes 1000 Hrs with <5% #6 blisters |
| Acid Pollutant Resistance | ASTM D 1308-87 (20% sulfuric acid 18hrs, 10% muriatic acid 15 minutes) | No effect |
| Graffiti Resistance | Cleanability of Defaced Panels (spray paint, pens, etc.) | No effect |
| Abrasion Resistance | ASTM D 968-93 (to expose 5/32" of substrate) | 25-40 Litres |
| Chalk Resistance | ASTM D 4214 (Florida exposure @ 45° S) | Rating not < 8 @ 10 yrs. Non Vertical Rating < 7 @ 10 yrs. |
| Colour Retention | ASTM 2244 - Hunter Units (Florida exposure @ 45° S) | Rating not < 5∆ Hunter Units @ 10 yrs |
| Adhesion | ASTM D 3359-95a (Reverse impacted 1/16" crosshatched) | No adhesion loss |
| Pencil Hardness | ASTM D 3363 | H-2H (NCAA 11-12) |
| Reverse Impact | ASTM D 2794-93 (3000 x inches of metal thickness) | Passes - No pick off with Scotch #610 tape |
| Flexibility T-Bend | ASTM D 4145-83 (no crack, no pick-off) | 2T-4T bends, no loss of adhesion |
| Film Cure | ASTM D 5402 (>100 double MEK rubs) | Passes |
| Fire Rating | E 84 | Fuel contributed zero, passes |
| Weatherometer | D6695 | Passes 3000 Hrs |
| UV Exposure | D4587 | Passes 1000 Hrs |
| Film Integrity | 40 Years Limited Warranty |
Mechanical Lock PVDF Cool Roofing Colours
PVDF ASTM Data
| PROPERTY | PVDF COATING TEST METHOD | PVDF COATING SPECIFICATION |
|---|---|---|
| Dry Film Thickness | ASTM D 1400-94 ASTM D 1005-95 | 0.75-1.85 Mil 0.90-1.15 Mil |
| Specular Gloss | ASTM D 523-89 @ 60° | 20-35 |
| Humidity Resistance | ASTM D 2247 (100% relative humidity @ 95°) | Passes 2000 Hrs |
| Salt Spray | ASTM B 117 (5% salt spray @ 95°) | Passes 1000 Hrs with <5% #6 blisters |
| Acid Pollutant Resistance | ASTM D 1308-87 (20% sulfuric acid 18hrs, 10% muriatic acid 15 minutes) | No effect |
| Graffiti Resistance | Cleanability of Defaced Panels (spray paint, pens, etc.) | No effect |
| Abrasion Resistance | ASTM D 968-93 (to expose 5/32" of substrate) | 100 Liters |
| Chalk Resistance | ASTM D 4214 (Florida exposure @ 45° S) | Rating not < 8 @ 20 yrs. |
| Colour Retention | ASTM 2244 - Hunter Units (Florida exposure @ 45° S) | Rating not < 5∆ Hunter Units @ 20 yrs |
| Adhesion | ASTM D 3359-95a (Reverse impacted 1/16" crosshatched) | No adhesion loss |
| Pencil Hardness | ASTM D 3363 | HB-2H |
| Reverse Impact | ASTM D 2794-93 (3000 x inches of metal thickness) | No cracking or loss of adhesion |
| Flexibility T-Bend | ASTM D 4145-83 | OT-3T bends, no loss of adhesion |
| Mandrel | ASTM D 522-93A (180 bend around 1/8" mandrel) | No cracking |