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138T/238T Standing Seam Roof Panel

Symmetrical, machine-seamed standing seam panels engineered for superior weathertightness, full panel replaceability, and flexible installation.

McElroy Metal’s 138T and 238T Systems use a unique T-seam that lets installers start or stop anywhere on the roof while maintaining a continuous factory-applied sealant for long-term performance.

Renderings & Profiles

Color Charts

Great for:

WALLS

ROOFS

RESIDENTIAL

COMMERCIAL

McElroy Metal 138T Plank & Pencil Rib Rendering

McElroy Metal 238T Plank & Pencil Rib Rendering

138T/238T Standing Seam Roof Panel Specs at a Glance

Panel Type

Rib Height

Major Rib On Center

Cover Width

Factory Panel Length

Onsite Forming Available

Substrate/Gauges

Installation

Finishes

Minimum Slope

Concealed fastener, mechanically seamed

138T: 1 3/8”; 238T: 2 3/8”

N/A

138T: 12", 16", or 18”; 238T: 16", 18” or 24” (site formed only)

Up to 80' (varies by manufacturing facility)

Yes

24 GA Galvalume®-see notes below for additional options

138T: Solid Deck; 238T: Solid Deck or Open Framing

Kynar 500® (PVDF); Galvalume® Plus (acrylic-coated)

138T: 1:12; 238T: ½:12

138T/238T Ideal Applications

Facilities where future modifications or equipment changes are expected, since individual panels can be easily removed and replaced without disturbing adjacent roof sections.
Low-slope roofs that require exceptional weathertightness and tested uplift performance.
New construction and retrofit roofing for commercial, industrial, and institutional facilities.
Architectural or structural installations requiring sleek aesthetics with concealed fasteners.
Metal-over-shingle recover projects using the 138T system, and metal-over-metal recover projects using the 238T system.

See 3D Textures Here

138T & 238T Standing Seam System on Arena

138T/238T Top 3 Benefits

Easy Panel Replacement and Repair: Unique T-seam design allows individual panels to be replaced anywhere on the roof without cutting or disturbing adjacent panels—making long-term maintenance simple, efficient, and cost-effective.
Flexible Start/Stop Installation: Unlike traditional standing seam systems that must begin at a specific edge, the 138T and 238T systems allow crews to start and stop installation anywhere on the roof, improving jobsite flexibility and reducing downtime caused by weather or sequencing.
Enhanced Weathertight Seal: The panel’s factory-applied sealant runs continuously past the clip location, rather than being interrupted, creating a tighter, more watertight system that performs exceptionally in severe weather conditions.

Choose a Document Type

Color Charts
Drawing Files
Installation
Literature
Maintenance
Product Info
Retrofit & Recover
SDS - Substrate & Paint
Specifications
Submittals
Technical Bulletins
Warranties

Color Charts

Architectural Color Chart

CAD Drawings

138T Pipe Penetration Details 138T Standard Curb Details 138T Standard Floating Eave Drip Detail 138T Standard Floating Eave Drip with Gutter Detail 138T Standard Floating Rake Fold Detail 138T Standard Floating Rake Tie-In Detail 138T Standard Fixed Hip Detail 138T Standard Fixed Hi-Side Tie-In Detail 138T Standard Fixed High Eave Detail 138T Standard Fixed Ridge Detail 138T Standard Floating Rake Detail 138T Standard Floating Valley Detail 238T Pipe Penetration Details 238T Standard Eave Drip Detail 238T Standard Eave Drip With Gutter Detail 238T Standard Floating Rake Fold Detail 238T Standard Floating Rake Detail 238T Standard Floating Rake Tie-In Detail 238T Standard Fixed Hip Detail 238T Standard Fixed Hi-Side Tie-In Detail 238T Standard Fixed Ridge Detail 238T Standard Roof Curb Details 238T Standard Floating Valley (Alt.) Detail 238T Standard Floating Valley Detail 138T Curb Install - Nail Base (Seam To Seam Curb) 138T Curb Install - Nail Base (Shingled In Curb) 138T Curb Install - Plywood (Seam To Seam Curb) 138T Curb Install - Plywood (Shingled In Curb) 138T Curb Install - R.I. / Metal Deck (Seam To Seam Curb) 138T Curb Install - R.I. / Metal Deck (Shingle In Curb) 138T Alternate Dektite Install - Nail Base (Seam To Seam) 138T Alternate Dektite Install - Nail Base (Shingled In) 138T Alternate Dektite Install - Plywood (Seam to Seam) 138T Alternate Dektite Install - Plywood (Shingled In ) 138T Alternate Dektite Install - R.I. / Metal Deck (Seam To Seam) 138T Alternate Dektite Install - R.I. / Metal Deck (Shingled In) 238T Curb Install - Nail Base (Seam To Seam Curb) 238T Curb Install - Nail Base (Shingled In Curb) 238T Curb Install - Plywood (Seam To Seam Curb) 238T Curb Install - Plywood (Shingled In Curb) 238T Curb Install - Purlin (Seam To Seam Curb) 238T Curb Install - Purlin (Shingled In Curb) 238T Curb Install - R.I. / Metal Deck (Seam To Seam Curb) 238T Curb Install - R.I. / Metal Deck (Shingled In Curb) 238T Alternate Dektite Install - Nail Base (Seam To Seam) 238T Alternate Dektite Install - Nail Base (Shingled In) 238T Alternate Dektite Install - Plywood (Seam To Seam) 238T Alternate Dektite Install - Plywood (Shingled In) 238T Alternate Dektite Install - Purlin (Seam To Seam) 238T Alternate Dektite Install - Purlin (Shingled In) 238T Alternate Dektite Install - R.I. / Metal Deck (Seam To Seam) 238T Alternate Dektite Install - R.I. / Metal Deck (Shingled In) 138T Shingle Recover / ASV Clip Eave w/ Gutter - Plywood 138T Shingle Recover / ASV Clip Eave - Plywood 138T Shingle Recover / ASV Clip Hip - Plywood 138T Shingle Recover / ASV Clip High Side Eave - Plywood 138T Shingle Recover / ASV Clip Hi-Side Tie-In - Plywood 138T Shingle Recover / ASV Clip Rake - Plywood 138T Shingle Recover / ASV Clip Rake Tie-In - Plywood 138T Shingle Recover / ASV Clip Ridge - Plywood 138T Shingle Recover / ASV Clip Valley - Plywood 138T Shingle Recover / ASV Clip Eave w/ Gutter - R.I. / Metal Deck 138T Shingle Recover / ASV Clip Eave - R.I. / Metal Deck 138T Shingle Recover / ASV Clip Hip - R.I. / Metal Deck 138T Shingle Recover / ASV Clip High Side Eave - R.I. / Metal Deck 138T Shingle Recover / ASV Clip Hi-Side Tie-In - R.I. / Metal Deck 138T Shingle Recover / ASV Clip Rake - R.I. / Metal Deck 138T Shingle Recover / ASV Clip Rake Tie-In - R.I. / Metal Deck 138T Shingle Recover / ASV Clip Ridge - R.I. / Metal Deck 138T Shingle Recover / ASV Clip Valley - R.I. / Metal Deck

PDF Drawings

138T Pipe Penetration Details 138T Standard Curb Details 138T Standard Floating Eave Drip Detail 138T Standard Floating Eave Drip with Gutter Detail 138T Standard Floating Rake Fold Detail 138T Standard Floating Rake Tie-In Detail 138T Standard Fixed Hip Detail 138T Standard Fixed Hi-Side Tie-In Detail 138T Standard Fixed High Eave Detail 138T Standard Fixed Ridge Detail 138T Standard Floating Rake Detail 138T Standard Floating Valley Detail 238T Pipe Penetration Details 238T Standard Eave Drip Detail 238T Standard Eave Drip With Gutter Detail 238T Standard Floating Rake Fold Detail 238T Standard Floating Rake Detail 238T Standard Floating Rake Tie-In Detail 238T Standard Fixed Hip Detail 238T Standard Fixed Hi-Side Tie-In Detail 238T Standard Fixed Ridge Detail 238T Standard Roof Curb Details 238T Standard Floating Valley (Alt.) Detail 238T Standard Floating Valley Detail R-Seal^® Side Lap Lap Detail 138T Curb Install - Nail Base (Seam To Seam Curb) 138T Curb Install - Nail Base (Shingled In Curb) 138T Curb Install - Plywood (Seam To Seam Curb) 138T Curb Install - Plywood (Shingled In Curb) 138T Curb Install - R.I. / Metal Deck (Seam To Seam Curb) 138T Curb Install - R.I. / Metal Deck (Shingle In Curb) 138T Alternate Dektite Install - Nail Base (Seam To Seam) 138T Alternate Dektite Install - Nail Base (Shingled In) 138T Alternate Dektite Install - Plywood (Seam to Seam) 138T Alternate Dektite Install - Plywood (Shingled In ) 138T Alternate Dektite Install - R.I. / Metal Deck (Seam To Seam) 138T Alternate Dektite Install - R.I. / Metal Deck (Shingled In) 238T Curb Install - Nail Base (Seam To Seam Curb) 238T Curb Install - Nail Base (Shingled In Curb) 238T Curb Install - Plywood (Seam To Seam Curb) 238T Curb Install - Plywood (Shingled In Curb) 238T Curb Install - Purlin (Seam To Seam Curb) 238T Curb Install - Purlin (Shingled In Curb) 238T Curb Install - R.I. / Metal Deck (Seam To Seam Curb) 238T Curb Install - R.I. / Metal Deck (Shingled In Curb) 238T Alternate Dektite Install - Nail Base (Seam To Seam) 238T Alternate Dektite Install - Nail Base (Shingled In) 238T Alternate Dektite Install - Plywood (Seam To Seam) 238T Alternate Dektite Install - Plywood (Shingled In) 238T Alternate Dektite Install - Purlin (Seam To Seam) 238T Alternate Dektite Install - Purlin (Shingled In) 238T Alternate Dektite Install - R.I. / Metal Deck (Seam To Seam) 238T Alternate Dektite Install - R.I. / Metal Deck (Shingled In) 138T Shingle Recover / ASV Clip Eave w/ Gutter - Plywood 138T Shingle Recover / ASV Clip Eave - Plywood 138T Shingle Recover / ASV Clip Hip - Plywood 138T Shingle Recover / ASV Clip High Side Eave - Plywood 138T Shingle Recover / ASV Clip Hi-Side Tie-In - Plywood 138T Shingle Recover / ASV Clip Rake - Plywood 138T Shingle Recover / ASV Clip Rake Tie-In - Plywood 138T Shingle Recover / ASV Clip Ridge - Plywood 138T Shingle Recover / ASV Clip Valley - Plywood 138T Shingle Recover / ASV Clip Eave w/ Gutter - R.I. / Metal Deck 138T Shingle Recover / ASV Clip Eave - R.I. / Metal Deck 138T Shingle Recover / ASV Clip Hip - R.I. / Metal Deck 138T Shingle Recover / ASV Clip High Side Eave - R.I. / Metal Deck 138T Shingle Recover / ASV Clip Hi-Side Tie-In - R.I. / Metal Deck 138T Shingle Recover / ASV Clip Rake - R.I. / Metal Deck 138T Shingle Recover / ASV Clip Rake Tie-In - R.I. / Metal Deck 138T Shingle Recover / ASV Clip Ridge - R.I. / Metal Deck 138T Shingle Recover / ASV Clip Valley - R.I. / Metal Deck

English Installation Manuals

138T Installation Manual 238T Installation Manual

Spanish Installation Manuals

238T Installation Manual

Brochures/Flyers

138T/238T Flyer Curved Systems Flyer 2025 Product Catalog

Metal Panel Care & Maintenance

Oil Canning Tech Sheet from MCA Operation and Maintenance Manual (Roofs)

Product Data Sheets

138T Product Data 238T Product Data SikaLastomer^® 511 Product Data

Product & Trim Information Books

138T Product Information Book 238T Product Information Book

R-Seal

R-Seal^® Material Data Sheets R-Seal^® Approval Drawing R-Seal^® MBI Combined Details Drawing R-Seal^® Panel Cross Sections R-Seal^® Technical Bulletin R-Seal^® VRR+ Facing Painting Spec Lamtec

Retrofit & Recover Systems

138T Shingle Recover System 238T Metal-Over-Metal Retrofit Clip

SDS - Substrate & Paint

Galvalume^® Substrate Paint - Almond Paint - Ash Gray Paint - Bone White Paint - Brandywine Paint - Brite Red Paint - Buckskin Paint - Champagne Metallic Paint - Charcoal Paint - Colonial Red Paint - Copper Penny Paint - Dark Bronze Paint - Evergreen Paint - Hartford Green Paint - Home Depot Orange Paint - IHOP Blue Paint - Leadcoat Paint - Mansard Brown Paint - Matte Black Paint - Medium Bronze Paint - Patina Green Paint - Patrician Bronze Paint - Preweathered Galvalume^® Paint - Regal Blue Paint - Regal White Paint - Roman Blue Paint - Sandstone Paint - Silver Metallic Paint - Slate Gray Paint - Surrey Beige Paint - Texas Silver Metallic Paint - White Backer Paint Pens - Kynar^® Paint Pens- Kynar^® ADS Data

Specifications

238T Aluminum 138T 238T

138T - 12"

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138T - 16"

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138T - 18"

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238T - 16"

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238T - 18"

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238T - 24"

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UL 580 Construction Numbers

138T #268D (Plywood) 138T #268C (Plywood) 238T #268B (Plywood) 238T #268A (Metal Deck) 238T #268 (Open Framing)

Approvals

Factory Mutual Approval 238T Fire Resistance (UL263) Ratings Fire Resistance (UL790) Ratings Florida Product Approvals Non-Structural Florida Product Approvals Structural Impact Resistance (UL 2218) Class 4 Miami Dade Approvals Texas Department of Insurance Windstorm Approvals

ASTM E1592 Uplift Tests

138T 18" 24 Ga 238T 16" 20 oz. Copper 238T 24" 24 Ga. MultiSpan Clips 138T 16" .040 Aluminum

Panel Load Tables w/Section Properties

138T Load Tables 12" 22 Ga. 50 KSI 138T Load Tables 12" 24 Ga. 50 KSI 138T Load Tables 16" 22 Ga. 50 KSI 138T Load Tables 16" 24 Ga. 50 KSI 138T Load Tables 18" 22 Ga. 50 KSI 138T Load Tables 18" 24 Ga. 50 KSI 238T Load Tables 16" 22 Ga. 50 KSI 238T Load Tables 16" 24 Ga. 50 KSI 238T Load Tables 18" 22 Ga. 50 KSI 238T Load Tables 18" 24 Ga. 50 KSI 238T Load Tables 24" 22 Ga. 50 KSI 238T Load Tables 24" 24 Ga. 50 KSI

Miscellaneous Information

138T 16" 24 Ga. Wind Fastening Table (Metal Deck) 138T 16" 24 Ga. Wind Fastening Table (Wood) 99-418-23 Curb Requirements for WTW

Finish and Substrate Warranties

Standard Galvalume^® Standard Fluropon^® Kynar 500^® PVDF with Galvalume^® Substrate Project Specific Galvalume^® Project Specific Fluropon^® Kynar 500^® PVDF with Galvalume^® Substrate

Weathertightness Warranties

WTW - Joint NRL (Certified Installer) WTW - Joint Sample WTW - Single Source NRL Sample (Certified Installer) WTW - Single Source Sample (Certified Installer)

Compare our standing seam panels using the tool below.

For information on all McElroy Metal products, visit our full product library.

Panel

Seam Type

Rib Height

Panel Widths

Minimum Slope

Install Substrate

Clips

Substrate / Gauges

Coating

Notable Approvals / Tests

138T/238T Standing Seam Roof Panel

Mechanical seam (symmetrical)

138T: 1 3/8”; 238T: 2 3/8”

138T: 12", 16", or 18”; 238T: 16", 18” or 24” (site formed only)

138T: 1:12; 238T: ½:12

138T: Solid Deck; 238T: Solid Deck or Open Framing

N/A

24 GA Galvalume®-see notes below for additional options

Kynar 500® (PVDF); Galvalume® Plus (acrylic-coated)

UL 263 Class A; UL 580 Class 90; UL 2218 Class 4; ASTM E1592; TDI (Aluminum 138T or Steel 238T over Plywood Deck); Florida Product Approval; Miami Dade; FM 4471 (238T only); ICC-ES Listing (238T Only)

Choose a panel to compare to 138T/238T Standing Seam Roof Panel

Components Gallery

138T Clip Standard

238T Clip Standard

138T Multi-Span Clip

238T Multi-Span Clip

238T Retrofit Clip

138T Shingle Recover Clip

138T/238T Seam Cap

138T Before Seaming

138T After Seaming

238T Before Seaming

238T After Seaming

138T Clip Standard

238T Clip Standard

138T Multi-Span Clip

238T Multi-Span Clip

238T Retrofit Clip

138T Shingle Recover Clip

138T/238T Seam Cap

138T Before Seaming

138T After Seaming

238T Before Seaming

238T After Seaming

Weathertightness Warranties

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.

See Warranties

Shop Drawing Service

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.

Download Shop Drawings

If you’re creating your own shop drawings, click the button below to gain full access to our CAD and PDF Files.

View Drawings

Curving Information

138T panels can be curved (16”, 18” width only)
238T panels can be curved (16”, 18” widths only)
138T, 238T, and Multi-Span Clips are curved onsite by McElroy curving technicians
Minimum Radius:
- 138T Steel - 10’ radius
- 238T Steel - 40’ radius
- 138T Alum - 10’ radius
- 238T Alum - 14’ radius
Multi-Span Clips - 35’ radius
Maximum length on Multi-Span clips is 30’
138T/238T panels can be curved for either Convex or Candy Cane radius applications
Equipment for Curving & Candy Cane style panels is based in Houston, TX but is mobile for jobsite production

See more standing seam curved panels here.

Standing Seam Roofing System Installed on Fire Station

Standing Seam Roofing System on Commercial Building

Standing Seam Roofing System on Industrial Building

138T & 238T Wall Applications

The 138T and 238T panels aren’t limited to roofs—they’re also excellent choices for vertical wall applications where strength, clean lines, and watertight performance matter. The same mechanically seamed design that provides outstanding weather protection on roofs delivers a seamless architectural finish on walls and fascias.

Both systems install using concealed clips that allow for thermal movement and continuous factory-applied sealant that runs past each clip for superior weather tightness. When used vertically, the T-seam profile creates crisp shadow lines that add depth and distinction to building exteriors.

Common wall applications include:

Architectural walls and fascias on commercial and institutional buildings
Accent walls or gables complementing 238T or 138T roof systems
Retrofit wall projects where durability and low maintenance are key

(138T and 238T panels offer consistent performance and visual harmony when used together on roof and wall assemblies.)

Mechanically seamed system offers greatly reduced air infiltration

Symmetrical panel allows for easy panel replacement if necessary for building modificationsrepair

Notes & Manufacturing Locations

Manufacturing: Clinton, IL; Peachtree City, GA; Adelanto, CA; Houston, TX
16” & 18” panels can be convex curved: 138T: 10’ radius; 238T 40’ radius
Batten caps include factory-applied sealant
Pan Condition Choices:
- 138T (16" & 18")
  - Plank & Pencil Ribs (recommended)
  - Flat Pan
  - Striated
  - Plank
  - Minor Ribs
- 138T (12")
  - Plank ( recommended)
  - Flat Pan
  - Striated
  - Minor Ribs
- 238T
  - Plank (recommended)
  - Flat (16" & 18" only)
  - Striated
  - Plank & Pencil Ribs
  - Minor Ribs
Additional Material Options: (Note: Minimum quantity and additional lead-time may apply)
- 22 GA Galvalume® steel
- .032" and .040" aluminum
- 16 oz. and 20 oz. copper (available from Houston plant only)
Oil canning is a natural occurrence in metal panels and not a cause for rejection.

Why Choose McElroy Metal

McElroy Metal is an employee-owned manufacturer with more than six decades of experience producing high-quality metal roofing, wall systems, and substructural components. Our nationwide manufacturing and service center network ensures consistent availability, responsive support, and dependable delivery. Built on a culture of craftsmanship and partnership, our products are engineered for long-term durability and trusted performance on projects of every size.

R-Seal®

r-seal-logo

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.

CONTINUOUS INSULATION SYSTEM

R-Seal® Advantages

Offers 7.5 per inch R-value

R-Seal is designed to be installed on top of Open frame metal buildings with purlins spaced 5’ O.C.

Rigid urethane board with shiplap side joints and waterproof facer

Tape seal flap makes a watertight joint between boards

Continuous R-Value of 7.5 per inch (no break over purlins)

42” wide board x up to 53’ long for super fast installation

With R-30 (4”) YOU CAN WALK ON IT!

Air-tight and water-tight after installation

Trades go right to work after installation in the building compressing the construction schedule

Ideal for new construction or removing and replacing a standing seam

Paintable

Find a Distributor / Contractor Near You

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.

Frequently Asked Questions

The questions below address common considerations and help guide product selection for your project.

What finish options are available?

Standard finishes include Kynar 500® (PVDF) coatings on 24 GA Galvalume® substrate, providing exceptional color retention and weather protection. For non-painted applications, we offer Galvalume® Plus (acrylic-coated). Learn More

What’s the difference between 138T and 238T?

The difference is rib height and intended use. 138T (1⅜") offers a shorter leg which creates softer lines and shadows. The lower leg height of the 138T also reduces uplift values and cost while requiring a greater roof slope.

Can 138T be installed directly over existing shingle roofs?

Yes. Our 138T Shingle Recover system was specifically developed for recover applications and can be installed over existing shingle roofing while avoiding tear-off in most cases.

What’s the minimum roof slope for these panels?

The 138T requires a 1:12 slope while the 238T can be installed down to a ½:12. In some cases, the 238T can be approved for ¼:12. Inquire for details

Are curved panels available?

Yes. Both systems can be curved under controlled conditions. Contact McElroy Metal for project-specific details.

138T/238T Standing Seam Roof Panel

Renderings & Profiles

Great for:

WALLS

ROOFS

RESIDENTIAL

COMMERCIAL

138T/238T Ideal Applications

138T/238T Top 3 Benefits

Color Charts

CAD Drawings

PDF Drawings

English Installation Manuals

Spanish Installation Manuals

Brochures/Flyers

Metal Panel Care & Maintenance

Product Data Sheets

Product & Trim Information Books

R-Seal

Retrofit & Recover Systems

SDS - Substrate & Paint

Specifications

138T - 12"

Customize your submittal package 138T - 12"

General Product and Warranty Information

Panel Load Tables w/Section Properties and Testing

Safety Data and Material Safety Data Sheets

138T - 16"

Customize your submittal package 138T - 16"

General Product and Warranty Information

Panel Load Tables w/Section Properties and Testing

Safety Data and Material Safety Data Sheets

138T - 18"

Customize your submittal package 138T - 18"

General Product and Warranty Information

Panel Load Tables w/Section Properties and Testing

Safety Data and Material Safety Data Sheets

238T - 16"

Customize your submittal package 238T - 16"

General Product and Warranty Information

Panel Load Tables w/Section Properties and Testing

Safety Data and Material Safety Data Sheets

238T - 18"

Customize your submittal package 238T - 18"

General Product and Warranty Information

Panel Load Tables w/Section Properties and Testing

Safety Data and Material Safety Data Sheets

238T - 24"

Customize your submittal package 238T - 24"

General Product and Warranty Information

Panel Load Tables w/Section Properties and Testing

Safety Data and Material Safety Data Sheets

UL 580 Construction Numbers

Approvals

ASTM E1592 Uplift Tests

Panel Load Tables w/Section Properties

Miscellaneous Information

Finish and Substrate Warranties

Weathertightness Warranties

Compare our standing seam panels using the tool below.

For information on all McElroy Metal products, visit our full product library.

Components Gallery

138T Clip Standard

238T Clip Standard

138T Multi-Span Clip

238T Multi-Span Clip

238T Retrofit Clip

138T Shingle Recover Clip

138T/238T Seam Cap

138T Before Seaming

138T After Seaming

238T Before Seaming

238T After Seaming

138T Clip Standard

238T Clip Standard

138T Multi-Span Clip

238T Multi-Span Clip

238T Retrofit Clip

138T Shingle Recover Clip

138T/238T Seam Cap