The Complete Guide to Butlerib II: Roofing and Wall Panel Specs Explained

Butlerib® II is one of the most widely used panel systems in the Butler lineup—and for good reason. It’s durable, economical, and designed for flexibility in both roofing and wall applications. Whether you’re ordering replacement panels or designing a new pre-engineered metal building, having the right specifications is critical.

In this guide, we break down everything you need to know about Butlerib II roof and wall panels in a clear, easy-to-understand format.

What Is Butlerib® II?

Butlerib II is a corrugated steel panel system designed for exterior walls and low-slope metal roofing. It offers excellent structural performance and a clean, ribbed appearance that fits commercial, agricultural, and industrial buildings.

Used in both new construction and retrofits, Butlerib II is factory-punched and compatible with Butler's insulation and trim systems.

Key Features of Butlerib II Panels

• 36-inch coverage width
• 1-1/2-inch rib height
• Available in 26-gauge or 24-gauge galvanized steel
• Stiffening ribs for added strength
• Can be installed vertically or horizontally (for walls)
• Factory-applied Butler-Cote™ finish for long-lasting color and corrosion resistance
• Designed for use with blanket insulation or rigid board systems

Butlerib II Panel Dimensions & Profile

These dimensions apply to both wall and roof panels, though installation and fastener details vary.

Installation: Roof vs. Wall Applications

For Roofing:

• Used on low-slope roofs (minimum 1/2:12 pitch)
• Installed over purlins with insulation above or below
• Panel side lap requires Butler factory sealer strip
• Commonly paired with ThermaLiner™ or faced batt insulation

For Walls:

• Panels can be installed vertically or horizontally
• May be used over girt systems or sheathing
• Compatible with Shadowall™, trim packages, and liner systems
• Commonly used in warehouses, ag buildings, retail centers

Performance and Durability

• Butlerib II is designed to resist uplift and wind loads
• Ribbed design adds structural strength and water-shedding capability
• Butler-Cote™ finish provides long-term UV and corrosion protection (solar reflective versions available)
• Fasteners are color-matched and exposed, but optional covers can be used for clean aesthetics

Compatible Insulation Systems

Butlerib II is often installed with:

• TBS™ Above-the-Purlin System — Up to R-38.7, tested with Guarded Hot Box
• ThermaLiner™ System — With clean interior liner and vapor control

R-values depend on system configuration, but Butler’s above-the-purlin setups are ideal for code compliance and long-term energy savings.

Trim and Accessories

Butlerib II integrates with a wide range of trim and closure components:

• Eave and rake trim
• Base closures
• Endwall and sidewall trim
• Gable and ridge caps
• Light panel options

All trims are available in matching Butler-Cote™ colors for a consistent look.

When to Use Butlerib II

Best for:

• Retail and commercial buildings
• Farm and ranch buildings
• Warehouses and utility structures
• Retrofits where MR-24® isn’t required

Not ideal for:

• High-slope roofs (consider VSR™)
• High-design buildings requiring concealed fasteners (consider Shadowall™ or VSR)

Ordering Butlerib II Panels and Parts

If you need Butlerib II panels for a new build or retrofit, Butler MFG Parts is your trusted source. We can help you:

• Match gauge, color, and finish
• Source matching trim and fasteners
• Ensure compatibility with insulation and framing systems

Need help identifying the right panel or replacement part? Contact us today and we’ll walk you through it.