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Help Prevent Clip Disengagement and Seam Separation

Clamp-to-seam technologies help increase wind-resistance capacity on standing seam metal roofs.

WindClamp Brochure


What Is an S-5! WindClamp™?

A wind clamp, otherwise known as an “external seam clamp,” is a small aluminum clamp placed over the seam at given intervals to prevent male-to-female seam separation and/or seam separation from its mounting clip. The wind clamp significantly increases the wind-resistance capacity of the panel system. It can also help prevent clip disengagement when used at clip locations. Actually, any of our seam clamps will improve wind resistance of the roof and can be used for that purpose. Our WindClamps, however, are specially designed solely for this purpose on select concealed-fastened seam profiles, so they are even more effective and more economical in quantity.

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Factory Mutual Property Loss Prevention Data Sheet: Reference section B in the link below to learn how any external seam clamp designed to fit a specific profile can be used as a wind reinforcement device.

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Why Install WindClamps on Your Metal Roof?

Design wind speeds and code requisites are upgraded over the years. What is a building owner to do upon discovering that his roof is no longer code-compliant and may be in danger of wind damage or blow-off?

In some situations, the application of wind clamps is highly engineered and extensively tested, while in others it is a “prescriptive” remedy. S-5! offers cost-effective solutions in both categories. They can preserve the roof’s integrity while significantly upgrading its wind uplift resistance as much as 3X for pennies per square foot of roof area.

Be sure to check out the many other features on the clamp overview page.

What Are the Advantages of Installing WindClamps?


Cost-Effective Solution for Existing Construction

  • Far less intrusive; no disruption to building occupants
  • Less costly than roof replacement
  • More cost-effective than alternative methods of improving wind resistance such as:
    • Adding clips and structure
    • Increasing panel gauge or decreasing seam spacing

Increase Resistance of Roof Uplift Loads

  • Allows the use of standing seam roofs in new construction when the roof alone does not meet requisite wind-suction pressures.
  • Offers an increase in failure pressures as much as 300% depending on panel profiles, gauge, and purlin spacing.
  • Can bring existing construction into ASCE 07-16 code compliance with minimal expense and without costly structural changes (ASCE 07 is the consensus standard used to determine design loads for building design).

Multiple Options to Fit Different Roof Profiles

Solutions for Wind-Uplift Resistance

S-5! WindClamps are designed with the same dependable, non-penetrating technology as our entire line of clamps. They utilize one setscrew for easy installation and are tailored to fit your roof profile to provide the best fit for increased wind-uplift performance.

MBCI Double-Lok®

MBCI Ultra-Dek®

Universal WindClamp 2X


WindClamp DL

Designed for MBCI Double-Lok® and similar profiles 


Master Box: $2.64

Qty: 800

*Pricing above is per clamp in USD. Prices vary based on region and other factors. Pricing improves with order quantity. Broken boxes may be subject to handling charges. Call your Authorized S-5! Distributor for current pricing.

Need Help Deciding on the Right WindClamp?

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What Roof Profiles Work With S-5! WindClamps?


How to Install the WindClamp on Your Roof Profile*

Partially thread the setscrew into the clamp by hand. Position the clamp on the seam. Tighten the setscrew using a screw gun and the included screw gun bit tip. The setscrew will dimple the seam material but will not penetrate it.

*See more detailed installation instructions below.

*S-5! clamps may be moved in the event of initial misplacement. However, due to the ensuing oxidation process which acts as a natural thread lock, we can express no opinion to the performance of a clamp once it has been removed and reinstalled or the ability to remove the clamp after this process has occurred.

WindClamp Installation Instructions

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