ASCEND Composite Cladding has been evaluated for use in high-wind conditions when installed in accordance with the manufacturer's published installation instructions and applicable code requirements. Wind performance depends on the complete wall assembly—including the framing, sheathing, weather-resistive barrier, fasteners, and installation quality—not the cladding panels alone.
ASCEND Technical Performance Guide
How Does ASCEND Perform in High Winds?
High winds place significant forces on an exterior wall system. Wind creates both positive pressure that pushes against the wall and negative pressure (uplift and suction) that attempts to pull cladding away from the structure. A siding system must resist both conditions while remaining securely attached to the building.
ASCEND Composite Cladding has been evaluated for structural performance under recognized code standards and is approved for use when installed according to the manufacturer's published installation instructions and applicable building codes. The actual wind performance of an installation depends on the complete wall assembly—not just the cladding itself.1
High-Wind Performance at a Glance
| Question | Answer |
|---|---|
| Is ASCEND approved for high-wind applications? | Yes, when installed in accordance with the current installation guide, evaluation reports, and applicable building codes. |
| Is there one published wind-speed rating? | No. Performance is based on allowable design wind pressures for the complete wall assembly rather than one universal wind-speed number. |
| What matters most? | Proper fastening, structural sheathing, framing, wall preparation, and installation quality. |
| Can improper installation reduce wind performance? | Yes. Incorrect fasteners, improper spacing, damaged substrates, or installation that does not follow the manufacturer's instructions can reduce system performance. |
Wind Performance Is a System, Not Just a Panel
One of the most common misconceptions is that siding alone determines whether a home can withstand high winds. In reality, the entire wall assembly works together to resist wind forces.
Components That Affect Wind Performance
- Wall framing
- Structural sheathing
- Fastener type and penetration
- Fastener spacing
- Weather-resistive barrier
- Corners and trim accessories
- Panel engagement
- Proper clearances for movement
- Correct installation techniques
Why Wind Pressure Matters More Than Wind Speed
Building codes design exterior walls using wind pressure rather than a simple wind-speed number. The pressure acting on a wall depends on many variables, including building height, roof geometry, exposure category, terrain, and whether the location is at a corner, edge, or interior wall zone.
Because of these variables, two homes located in the same city may have different design wind requirements even if they experience the same storm.
ASCEND Must Be Installed Over a Suitable Wall
The installation guide requires ASCEND to be installed over approved structural sheathing and a properly installed weather-resistive barrier. Loose sheathing, deteriorated framing, or water-damaged substrates should be repaired before installation begins.2
Pre-Installation Structural Checklist
- ☐ Inspect framing.
- ☐ Repair damaged sheathing.
- ☐ Verify weather-resistive barrier installation.
- ☐ Confirm flashing at windows and doors.
- ☐ Replace deteriorated framing if necessary.
- ☐ Remove loose fasteners.
- ☐ Verify attachment surfaces are sound.
Fastening Is Critical
Proper fastening is one of the most important contributors to wind performance. The manufacturer specifies approved fastener types, minimum penetration, nail-slot placement, spacing, and fastening techniques. Driving fasteners too tightly or using unapproved fasteners can reduce the panel's ability to perform as intended.3
Corners and Roof Edges Experience Higher Loads
Wind pressures are typically highest near roof edges, corners, and projecting architectural features. These areas deserve careful attention during installation because they experience greater suction forces than large interior wall fields.
High-Stress Areas
- Outside corners
- Roof-to-wall intersections
- Gable ends
- Eaves
- Rakes
- Dormers
- Large wall projections
Expansion Clearance Still Matters
Some installers mistakenly believe tighter fastening improves wind resistance. In reality, panels must still be able to move as designed. Driving fasteners tightly against the nail hem or eliminating required clearances can create stress that leads to buckling or distortion during seasonal temperature changes.3
Wind-Driven Rain Is Often the Bigger Concern
Severe storms frequently combine strong winds with heavy rain. Proper flashing, drainage, and weather-resistive barriers are essential because wind-driven rain can expose weaknesses around windows, doors, roof intersections, and penetrations.
Areas to Inspect Carefully
- Window flashing
- Door flashing
- Kickout flashing
- Roof intersections
- Utility penetrations
- Mounting blocks
- Horizontal transitions
Common Installation Mistakes That Reduce Wind Performance
- Installing over deteriorated sheathing
- Using incorrect fasteners
- Improper fastener spacing
- Driving fasteners too tightly
- Skipping required flashing
- Improper panel engagement
- Blocking drainage paths
- Using damaged accessories
- Ignoring current installation instructions
Contractor High-Wind Checklist
- ☐ Review current installation guide.
- ☐ Verify project wind-load requirements.
- ☐ Inspect framing and sheathing.
- ☐ Install weather-resistive barrier.
- ☐ Use approved fasteners.
- ☐ Maintain required fastener spacing.
- ☐ Confirm flashing details.
- ☐ Verify panel engagement.
- ☐ Inspect corners and roof intersections.
- ☐ Complete final quality inspection.
The Bottom Line
ASCEND Composite Cladding is designed for use in code-compliant exterior wall assemblies and has been evaluated under recognized structural standards for wind performance. Rather than relying on a single advertised wind-speed number, contractors should design and install the complete wall assembly to meet the project's required design wind pressures.
Proper fastening, sound sheathing, integrated flashing, correct accessories, and adherence to the manufacturer's current installation instructions are the keys to achieving reliable high-wind performance.
Build With Confidence Using Suburban Wholesale & Supply
Suburban Wholesale & Supply helps contractors and homeowners throughout Eastern Iowa and Western Illinois select ASCEND Composite Cladding, coordinate accessories, review technical literature, and understand current installation requirements. Our team can assist with material takeoffs, product availability, and the latest manufacturer resources for projects in demanding Midwest weather conditions.
Contractor Notes
We‘re here to help.
Suburban Wholesale & Supply works with contractors, remodelers, builders, and property professionals across Davenport, Bettendorf, Moline, Rock Island, and the wider Quad Cities. If How Does ASCEND Perform in High Winds? affects a project you are pricing, our team can help compare product lines, confirm available options, and prepare a quote that fits the opening, exterior, or jobsite requirements.
Our counter and showroom teams support window, patio door, entry door, storm door, siding, trim coil, gutter protection, and accessory orders every week. We can talk through manufacturer differences, color and finish selections, installation details, lead times, and documentation so you can give your customer clear answers before the work begins.
For current availability, contractor pricing, product literature, or help matching this topic to a real project, contact Suburban Wholesale & Supply or send the details through our quote form. We will help you move from product research to an accurate material order with fewer surprises.
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