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.

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

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.

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.

Common Installation Mistakes That Reduce Wind Performance

Contractor High-Wind Checklist

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.