While standing seam roofing systems have been used for generations, 138T and 238T panels feature technological advances in roofing that set a new standard for standing seam performance. 138T and 238T systems are classified as symmetrical standing seam systems that feature mechanically seamed caps. This product family offers many advantages including patented recover solutions featuring the industry's best method to recover existing metal or shingle roofs. The most important advantage of the 238T and 138T systems are that they are easy to repair or alter after installation. Unlike asymmetrical standing seam systems, individual 138T and 238T panels can be removed and replaced. With Galvalume roof life expectancy approaching 60 years, this ability to replace individual panels is very important. Mechanical seamers and hand crimpers are available for rent through Developmental Industries (DI) at mcelroyseamers.com.
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138T and 238T advantages include:
Need a concealed fastener wall panel option with design flexibility and decades-long curb appeal? We have you covered with our 138T & 238T profile.
With panel widths from 16-24", in-seam sealant, and several different pan conditions, this system can be used to create stunning applications like the award-winning Champions Hall project at the University of Arkansas.
Additional Benefits:
Contact a McElroy representative for more information about 138T and 238T wall applications.
| Details | |
|---|---|
| 138T Minimum slope | 1:12 |
| 238T Minimum slope | 1/2:12 1/4:12 considered with prior approval |
| Installation | - 138T must be installed over solid deck - 238T can be installed over solid deck or open framing |
| Manufacturing Facilities | -Panels can be factory or jobsite formed -Factory forming at Clinton, IL; Peachtree City, GA; Adelanto, CA; Houston, TX; |
| Note | 138T & 238T are mechanically seamed profiles |
| Note | Oil Canning is a natural occurrence in metal panels and is not a cause for panel rejection |
| Testing | |
|---|---|
| 138T/238T | - Uplift test: UL 580 Class 90; ASTM E 1592 - Fire Rating: UL Class A - Impact Resistance: UL Class 4 |
| 238T Only | - Uplift: FM4471 - Air Infiltration: ASTM E1680 - Water Infiltration: ASTM E1646 - Static Water: FM 4471 Appendix G, ASTM E2140 - Texas Department of Insurance: RC-270 - Florida State Approval: FBC #16606.1; #16606.2; #16606.3 - Miami Dade Approval - ICC-ES Approval: ESL-1082 - FM Class: 1-SH |
| Testing Data | For available Test Data, Section Properties or Load Tables, please visit our downloads section. |
| Panel Options | |
|---|---|
| Panel Height & Width | 138T: 1 3/8" x 12", 16", 18" 238T: 2 3/8" x 16", 18", 24" 238T: 24" Panel formed on-site only |
| Panel Configurations | - 138T (16" & 18"): Flat, Striated, Plank & Pencil Ribs, Plank, Minor ribs (Plank & Pencil Rib recommended) 138T (12"): Flat, Striated, Minor Ribs, Plank (Plank recommended) - 238T: Flat (16" & 18" only), Striated, Plank & Pencil Ribs, Plank, Minor Ribs (Plank & Pencil Rib recommended) |
| Coating | Kynar 500® (PVDF) |
| Substrate | - Standard 24 GA Galvalume® - Optional 22 GA Galvalume - Optional .032 and .040 aluminum - Optional 16 oz and 20 oz copper (Houston Plant Only) |
R-Seal’s continuous insulation system reduces heat transfer through the building's framing. Traditional insulation systems allow more heat to be conducted through the building's framing.
