Dual Undersill Trim 

Dual Undersill Trim is designed to secure two courses of vinyl siding or panels simultaneously, providing a neat, professional finish while simplifying installation. Ideal for transitions under windows, doors, or along eaves, it ensures panels stay firmly in place.

Features & Benefits 

Performance

• Holds two courses of siding securely, preventing lifting or shifting
• Ensures consistent alignment and a clean, finished look
• Adds protection against wind and weather intrusion

Design & Installation

• Streamlines installation by accommodating two panels at once
• Works with multiple siding profiles and materials
• Available in a variety of colors to match exterior finishes

Durability

• Made from durable, weather-resistant materials
• Maintains performance through temperature and moisture changes
• Long-lasting, low-maintenance solution for siding transitions