MasterLok-90 (also referred to as ML-90) is a snap together trapezoidal standing seam system designed for projects with slopes as low as 1/4:12.
MasterLok-FS (also referred to as ML-FS) is a mechanically seamed trapezoidal standing seam system also designed for projects with slopes as low as 1/4:12. For seaming tool rental click here.
Both panels are best suited for simple sloped roofs without dormers, hips, valleys or other special conditions. ML-90 and ML-FS can be installed over solid decking or substructural members.
MLFS panels are mechanically seamed. Mechanical seamers and hand crimpers are available for rent through Developmental Industries (DI) at mcelroyseamers.com, a website created just for McElroy customers.
MasterLok-90/MasterLok-FS roof panels with McElroy's MoistureLok, offer a great option to address condensation challenges. The design of our MoistureLok product traps moisture and then releases it back into the air as natural humidity once conditions go back below the dew point.
| Details | |
|---|---|
| Sealant | Factory applied to improve weather-tightness |
| Minimum slope | ML-90 1/4:12; ML-FS 1/4:12 |
| Installation | Can be over solid deck or open framing |
| Manufacturing Facility | Bossier City, LA; Clinton, IL; Winchester, VA |
| MasterLok-FS | Mechanically seamed system |
| MasterLok-90 | Snap Together System |
| Note | MoistureLok available on MasterLok-90 |
| Note | Oil Canning is a natural occurrence in metal panels and is not a cause for panel rejection |
| Testing | |
|---|---|
| Fire Rating | Class A |
| Uplift Test | UL580 Class 90, ASTM E1592 |
| Air Infiltration | ASTM E1680 |
| Water Infiltration | ASTM E1646 |
| Class 4 Impact Resistance | UL2218 |
| MasterLok-90 Florida State Approval | 1832.2, 1747.1 |
| MasterLok-FS Florida State Approval | 8051.1 |
| Testing Data | For available Test Data, Section Properties or Load Tables, please visit our downloads section. |
| Panel Options | |
|---|---|
| Panel Width | 24" |
| Coating | Kynar 500® (PVDF) |
| Substrate | - Standard 24 GA Galvalume® - Optional 22 GA Galvalume |
