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.
| 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 |
| 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 |
