The Boral Zephyr Weather Block 11" x 33' is a ridge vents for jobs that require Boral model/MPN 91078 in the RL sell unit. Zephyr Block is a flexible, roll able universal weather block that helps reduce labor costs and time.

Key Specs

• Brand: Boral
• Model / MPN: 91078
• SKU: BOR91078
• Sell unit: RL
• Product type: Ridge Vents
• Size / color: 11" x 33'
• Category: Residential Roofing | Residential Roofing/Ventilation | Residential Roofing/Ventilation/Ridge Vents | Ventilation | Ventilation/Ridge Vents

Key Features

• Universal hip and ridge weather block
• Rollable installation reduces labor and installation costs
• Butyl adhesive strips provide a weather-tight seal

Coverage & How Much You Need

Coverage or yield is not specified in the available product details. Use the manufacturer installation instructions and project takeoff before converting the job size into order quantity.

Compatibility / Fitment

Use this item only when the brand, model/MPN, size/color, sell unit, and system type match the project specification. Do not substitute it for a different ridge vents, pack size, color, membrane/system family, or installation condition without checking the manufacturer instructions.

FAQs

What exactly am I ordering?

Boral Zephyr Weather Block 11" x 33', sold as RL, with SKU BOR91078 and manufacturer model/MPN 91078.

What model or part number should I match?

Match model/MPN 91078 and confirm the brand is Boral. If the job spec lists a different model, size, color, or system family, hold for review.

What unit is the price based on?

This listing is built around the RL sell unit. Confirm the unit before comparing price, quantity, or coverage.

How do I estimate quantity?

Coverage or yield is not specified in the available product details. Use the project takeoff and manufacturer instructions before estimating quantity.

What should be checked before purchase?

Confirm the model/MPN, sell unit, size/color, jobsite condition, compatible system components, and any manufacturer installation limits before approving the order.

Roofing and exterior-envelope work can involve fall hazards, weather exposure, fumes, adhesives, and system-specific installation requirements; follow the manufacturer instructions, OSHA-safe work practices, and local code or use a qualified contractor.

Product Expert Notes

Choose this item when Boral model/MPN 91078, SKU BOR91078, and the RL sell unit match the project requirement. It is best treated as an exact-match material selection, not a generic substitute.