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Spacing For Standing Seam Metal Roof Wind Uplift Resistance System

WindBar Standing Seam Metal Roof Noise and Wind Uplift Suppression
Spacing Guidelines

Coastal winds, microbursts, hurricanes, and tornadoes cause millions of dollars in metal roof damage every year. WindBar is a patented, external purlin system mounted with stainless steel, non-penetrating seam clamps, and our patented WindStopper foot. Once installed, a square bar spans between clamps, and the WindStopper is attached to the bar over the middle of the panel. The WindStopper foot holds down the middle of the panel, preventing lift caused by negative wind pressure. Engineered to increase a metal roof's wind uplift performance by up to 300%. This is the industry's only system that prevents seam disengagement while also preventing the pillowing of the panels. Metal roof damage can now easily be avoided with the use of the WindBar system. WindBar is designed to help your building meet the new tougher ASCE 7-98 wind code guidelines. WindBar can also be designed as part of a full snow retention system for additional protection from sliding snow and ice, all in one easy-to-install system. Isolating Windbar on partial roof sections such as just over doorways or roof vents in areas that receive snow and ice, is not recommended.   This page should only be used only as a quick reference guide for estimating.  Always consult with an architect or engineer for recommended snow guard placement for your project.  This spacing guideline does not account for snow shadows, drifting, or unseasonable conditions.  

All Roof Pitches


Panel: Valleys 12 to 24 inches.
WindStoppers Required: 12 inches to 17 inches needs 1 WindStopper Per Panel - 18 inches to 24 inches needs 2 WindStoppers Per Panel (Required)
Pitch: 10/12 to 12/12
Spacing: Every 5 feet up the roof.
Isolated Roof Areas: Never use WindBar in isolated roof areas such as just over doorways, etc. in areas that receive winter precipitation.
Snow load: Up to 45 PSF ground snow load.

Starting at 1 foot from the bottom edge, or over the end wall on a unsupported overhang, place the WindBar using one clamp per seam, across the entire roof area. Go up the roof every 5 feet and run another row of WindBar across the entire roof. Do not exceed 5 feet vertically between rows of bars. For Example: if your roof sheets are 10 feet long, your roof would require a row at approximately 1 foot from the bottom and at 5 feet up from the bottom. When possible, always attempt to divide the roof areas into equal sections, with equal distance between rows, without exceeding the manufacturer's maximum placement guidelines.


 This page may be used only for the purpose of developing plans, specifications, and/or approval drawings for construction projects utilizing only IceBlox, Inc. manufactured or distributed products and components. It is to be used only as a quick reference for estimating snow guard quantities and placement on roofs with less than 45 PSF ground snow load.

IceBlox Inc., d.b.a SnoBlox-Snojax, referred to hereafter as IceBlox, Inc., or any subsidiary brands or companies, is not responsible for estimates or purchases resulting from the erroneous or improper use of this page or

The user shall determine the suitability of the product for its intended use and assumes all risks of its use or handling. In regards to spacing guidelines, quotations, and or layouts, Iceblox, Inc. will not be held liable for incorrect material quantities not recommended on and/or 

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WindBar Spacing Frequently Asked Questions (FAQs)


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    Lifetime Warranty

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