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 (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; Ashburn, GA |
| 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® (Inquire. Possible minimum order and longer lead time may apply.) |
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Samples & Color Charts
Request physical samples and color charts. All items will be sent out via UPS ground unless otherwise specified.
If your project requires a Weathertightness Warranty and you don’t already have a job specific Pre-Approval Form issued by McElroy Metal, click the button below to get started.
Running short of time to complete your own shop drawings? McElroy Metal can help. Click the button below to provide us some basic information and we’ll be in touch soon to discuss your project specifics.
If you’re creating your own shop drawings, click the button below to gain full access to our CAD and PDF Files.
Whether you’re building a new home or planning renovations, a metal roof can deliver long-term cost savings and comfort. To explore your options and find the product that meets your aesthetic and budgetary needs, contact a McElroy Metal distributor or contractor in your area today. We can’t wait to help make your dream home a reality.
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