SnoBar ColorBar 2 Bar Screw-Down Installation Instructions

Required Tools

Recommended tools for installing the SnoBar ColorBar 2-bar screw-down snow retention system include:

• Hammer for installing SnoBar plastic end caps
• Drill or impact driver with 3/8" nut driver for #14 screws
• 3/16" Allen bit for tightening set screws
• 9/16" hand wrench for tightening the SC-2B bracket top bolt
• Tape measure
• Chalk line or pencil for marking purlin locations
• Hacksaw
• Deburring file
• Pencil

System Parts

Verify all system parts against the packing slip before starting installation. The system should include:

• #14 woodgrip or self-drilling metal-to-metal fasteners with bonded sealing washers
• SnoBar or ColorBar rails
• End caps, only for SnoBar
• SC-2B screw-down double bar brackets
• Splice connectors, only for connecting multiple ColorBars
• MRM mounting brackets and hardware

Determine the Layout of Rows

Use our screw-down snow rail spacing guide to determine row layout, bracket spacing, and whether additional rows are required. A basic starting point is one row placed 12" to 18" up from the eave, or over the load-bearing wall or first purlin when an overhang is present. Additional rows should be spaced evenly up the roof slope, with every row landing on a structural purlin. Confirm purlin locations before drilling. Each base must be fastened through the panel and into a purlin.

Installation Instructions

1. Locate the Purlin and Mark Fastener Positions

Measure 12" to 18" up from the eave, or locate the bearing wall or first purlin when required. Mark the base fastener locations with a pencil or chalk line. Each MRM bracket must be anchored through the panel and into a purlin or structural support.

2. Position the MRM Bracket and Fasten Through to the Purlin

Set the MRM mounting bracket on the flat of the panel, between minor ribs, at the marked location. Center the bracket over the purlin.

Using a drill or impact driver with a 3/8" nut driver, install the supplied #14 woodgrip screws for wood purlins or #14 self-drilling metal-to-metal screws for steel purlins. Install fasteners through every fastener hole in the base.

Continue installing MRM mounting brackets across the row according to the recommended spacing layout. Typical bracket spacing is 12" to 18" on center, depending on snow load, panel type, and purlin spacing. Every bracket must land on a purlin or structural support.

3. Confirm Bracket Alignment Across the Row

Before installing the bars, confirm that every MRM mounting bracket is aligned across the row, seated flat on the panel, and fastened into a purlin or structural support.

4. Install the SC-2B Screw-Down 2-Bar Bracket to the Top of the MRM Roof Mount.

Install the SC-2B screw-down double bar bracket onto the top of the MRM roof mount bracket. Use a 9/16" hand wrench to tighten the top bolt securely.

5. Top-Load the Snow Bars into the SC-2B Brackets

Insert a full section of the lower bar into the lower receiver of every SC-2B bracket in the row. Then slide the upper bar through the upper receiver.

The bars should be fully seated in each receiver and run continuously along the row. Do not allow more than 3" of bar to extend past the last base at the end of a row. Do not attach a short bar to a single isolated base.

6. Secure the Bars to the SC-2B Brackets

Secure the bars with the supplied tek screws or retaining hardware as required for the system. Confirm that both bars are fully seated and properly retained before moving to the next row or section.

7. Install Splice Connectors to Join ColorBars

For SnoBar, butt joints should be centered between two brackets with no more than a 2" gap between the butted bar ends.

For ColorBar, the supplied splice connectors create a continuous bar run. Butt the ColorBar ends approximately 1/8" apart to allow for thermal expansion and contraction. ColorBar splice connections can be made anywhere along the row except inside a bracket. Install each splice connector with one tek screw.

8. Install End Caps

If using 1" square SnoBar, install the supplied plastic end caps at each end of the bar. Deburr any field-cut bars before installing end caps.

If using aluminum ColorBar, disregard this step.

9. Lay Out Additional Rows

Space additional rows of SnoBar or ColorBar evenly up the slope according to the recommended layout. Always measure from the eave edge and always land each row on a purlin.

Proper row layout helps control snow and ice movement while distributing load across the roof structure. For spacing assistance, call 800-766-5291.

Installer and Owner Responsibility

The designer, architect, installer, or owner should understand the local ground snow load, roof slope, panel length, climatic conditions, roof orientation, drifting potential, purlin spacing, and existing panel fastening pattern before installing a SnoBar or ColorBar 2-bar screw-down snow retention system.

Extreme winter conditions, drifting, ice buildup, and unusual snowfall can create conditions beyond the design recommendations of any snow retention system. When extreme buildup occurs, snow and ice should be safely removed from the roof.