Standing Seam Panels

138T and 238T Standing Seam Roofing Systems

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.

Specifications & 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

  • 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

  • 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)

Instaloc Snap Lock Standing Seam Panels

Instaloc is a snap-together standing seam system that features a 1” seam and is installed with concealed clips. Instaloc is designed to be used with solid decking and the low profile seam makes the panel an excellent option for light commercial and residential applications.

Specifications & Details

  • Minimum Slope:

    3:12

    Installation:

    Must be over solid deck

    Sealant:

    Factory applied

    Manufacturing Facilities:

    Houston, TX

    Note:

    Oil Canning is a natural occurrence in metal panels and is not a cause for panel rejection

  • Fire Rating:

    Class A

    Uplift Test:

    UL 580 Class 90, UL 1897

    Class 4 Impact Resistance:

    UL 2218

    Texas Department of Insurance Approval:

    RC-86

  • Panel Width:

    13"

    Panel Configurations:

    Striated, Plank and Minor Rib (Striated recommended)

    Coating:

    Kynar 500® (PVDF)

    Substrate:

    Standard 24 GA Galvalume®

MasterLok-90 and MasterLok-FS Trapezoidal Panels

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. 

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. 

Specifications & 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

  • 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

  • Panel Width:

    24"

    Coating:

    Kynar 500® (PVDF)

    Substrate:

    - Standard 24 GA Galvalume®

    - Optional 22 GA Galvalume

Maxima

With an opportunity to choose from three distinct Maxima profiles: Maxima, Maxima 1.5 and Maxima ADV, McElroy’s Maxima family of products represents the industry’s broadest selection of vertical leg standing seam systems. In order to meet the varying needs of architects and contractors, each offers unique performance characteristics that enable users to match a Maxima panel to specific aesthetic and performance specifications.

In some cases, Maxima panels can be produced on-site by McElroy factory technicians.  Maxima 1.5" and 2" panels can also be curved for use with radius roof situations.

Specifications & Details

  • Profile:

    Mechanically seamed

    Sealant:

    Factory applied (on non-curved panels only)

    2" factory-formed eave notch:

    Upon request

    Minimum slope for 1.5":

    1:12

    Minimum slope (for 2"):

    1/2:12

    Minimum slope (for 3"):

    1/4:12

    Installation:

    Can be installed over solid deck or open framing

    Thermal Movement:

    Floating clips allow for 3 1/8"

    Note:

    Maxima 2" and ADV also available jobsite formed for long lengths

    Manufacturing Facilities:

    Maxima1.5": Peachtree City, GA, Houston, TX

    Maxima 2": Clinton, IL; Peachtree City, GA; Adelanto, CA; Sunnyvale, TX; Houston, TX

    Maxima 3": Peachtree City, GA

    Aluminum - Sunnyvale, TX only

    Note:

    Oil canning is a natural occurrence in metal panels and is not a cause for panel rejection.

  • Fire Rating:

    Class A

    Uplift Test:

    UL580 Class 90, FM 4471 (2" only) (1-90 Rated), ASTM E1592 (1.5", 2" & 3")

    Air Infiltration:

    ASTM E1680

    Water Infiltration:

    ASTM E1646

    Class 4 Impact Resistance:

    UL 2218

    Florida State Approval:

    1747.3, 1832.4 (2" & 3")

    Fire Resistance:

    UL263

    Miami-Dade Approval:

    (2:16 Only)

    ICC-ES Approval:

    ESL-1082

    Note:

    All testing conducted with Galvalume® substrate. No testing available with aluminum.

  • Seam Height:

    1.5”, 2” & 3”

    Seam Style:

    2" and 3" - 90 Degree Seam

    1.5" and ADV - 180 Degree Seam

    Panel Width:

    - Maxima 1.5"; 2" & ADV: 12", 16", 18"

    - Maxima 3": 18", 24"

    Panel Configurations:

    - Maxima 1.5"; 2" & ADV: Flat, Striated, Pencil Ribs, Minor ribs (3" only)

    - Maxima 1.5" and ADV can be curved

    Coating:

    Kynar 500® (PVDF)

    Substrate:

    - Standard 24 GA Galvalume®

    - Options 22 GA Galvalume®

    - Optional .032 and .040 aluminum

Medallion-Lok Snap Lock Panels

Medallion-Lok effectively captures the beauty and elegance of a standing seam roof. Adding curb appeal to any project, the narrow 1.75-inch tall standing seam creates crisp, clean visual lines. Medallion-Lok features hidden clips and a snap-together seam which eliminates the need for jobsite seaming. While primarily a commercial panel, Medallion-Lok is also an excellent choice for larger, custom homes.

Specifications & Details

  • Minimum slope:

    3:12

    Sealant:

    Factory Applied

    Installation:

    Can be installed over solid deck or open framing

    Manufacturing Facilities:

    Clinton, IL; Peachtree City, GA; Adelanto, CA; Sunnyvale, TX

    Note:

    Factory formed eave notch upon request in: Clinton, Peachtree City and Sunnyvale

    Note:

    Oil Canning is a natural occurrence in metal panels and is not a cause for panel rejection

  • Fire Rating:

    Class A

    Uplift Test:

    UL580 Class 90, ASTM E1592

    Air Infiltration:

    ASTM E1680

    Water Infiltration:

    ASTM E1646

    Class 4 Impact Resistance:

    UL 2218

    Florida State Approval:

    1747.5 and 1832.7

    Fire Resistance

    UL263

    Miami Dade Approval

    ICC-ES Approval

    ESL-1082

  • Panel width:

    12", 16" and 18"

    Panel configurations:

    Striated, Ribbed or Flat Pan (Striated recommended)

    Coating:

    Kynar 500® (PVDF)

    Substrate:

    - Standard 24 GA Galvalume®

    - Optional 22 GA Galvalume

    - Optional .032 aluminum

Meridian Snap Together Metal Roofing

Meridian has it all! An aesthetically pleasing, snap-together, standing seam roof panel that is economical and easy to install. With no need for clips, Meridian panels are simply attached to the roof deck with pancake head fasteners. Equally well-suited for commercial and residential applications, Meridian is always an excellent choice!

Specifications & Details

  • Factory formed eave notch:

    Available upon request

    Minimum slope:

    3:12

    Installation:

    Must be over solid deck

    Manufacturing Facilities:

    Clinton, IL; Peachtree City, GA; Adelanto, CA; Sunnyvale, TX

    Note:

    Oil Canning is a natural occurrence in metal panels and is not cause for panel rejection

  • Fire Rating:

    Class A

    Air Infiltration:

    ASTM E1680

    Water Infiltration:

    ASTM E1646

    Class 4 Impact Resistance:

    UL 2218

    Texas Department of Insurance Approval:

    Evaluation RC-34

    Florida State Approval:

    2358.1

  • Panel width:

    12" and 16"

    Panel configurations:

    - 16" Minor Ribs or Striated

    - 12" Minor Ribs or Striated

    Coating:

    Kynar 500® (PVDF)

    Substrate:

    - Standard 26 GA Galvalume® 16" only

    - Standard 24 GA Galvalume 12" and 16"

Trap-Tee

2 3/4" tall symmetrical Trap-Tee system is a site-formed, mechanically seamed system designed to resolve the three major shortcomings of trapezoidal standing seam roof systems: leaking endlaps, low wind uplift capacity, and difficult to repair.

Site forming eliminates end laps that tend to leak over time, oversized seam and special clips dramatically increase wind uplift capacity and the symmetrical design allows for easy repair or alteration after the roof is installed. With a life expectancy approaching 60 years, the ability to add curbs, vents, single panel replacement, and even building additions represents a critical component.


Specifications & Details

  • Profile:

    2 3/4" Mechanically Seamed

    Manufacturing Facililties:

    Houston, TX

    Seam Cap:

    Seam cap includes 2 beads of continuous factory-applied sealant

    Minimum slope:

    1/4:12

    Installation:

    Can be installed over a solid deck or open framing

    Suitability:

    Best suited for simple sloped roofs without dormers, hips, valleys or other special conditions.

    Note:

    Oil Canning is a natural occurrence in metal panels and is not a cause for panel rejection

  • Uplift Test:

    ASTM E1592

    Air Infiltration:

    ASTM E1680

    Water Infiltration:

    ASTM E1646

  • Panel Width:

    18" & 24" Site Formed only

    Panel configurations:

    Minor Ribs

    Coating:

    Acrylic Coated Galvalume®

    Kynar 500® (PVDF)

    Substrate:

    Standard 24 GA Galvalume®

    Optional 22 GA & 20 GA Galvalume®