Window & Door Performance Standards
At XL Building Products Co., we are committed to delivering high-performance windows and doors that meet or exceed the standards set by industry leaders, including NAFS (North American Fenestration Standard), AAMA (American Architectural Manufacturers Association), and WDMA (Window & Door Manufacturers Association).
Our products are thoroughly tested and certified to perform under a wide range of conditions—ensuring long-term reliability, energy efficiency, and structural integrity, no matter the application.
Performance Classes We Offer
Understanding performance classes helps architects, builders, and homeowners select the right products for their specific project needs. Here's a breakdown of the four main classes our windows and doors are designed to meet:
R Class – Residential
Ideal For: Low-rise, single-family homes
Our Residential (R) Class products are engineered for standard home applications. They meet essential structural, air, and water resistance requirements while providing exceptional energy efficiency and aesthetic appeal for today’s homeowners.
LC Class – Light Commercial
Ideal For: Low- to mid-rise multifamily buildings, hotels, and offices
Light Commercial (LC) Class windows and doors offer enhanced strength and performance for more demanding environments. Designed for buildings with increased exposure and occupancy, these products provide a higher level of durability and functionality.
CW Class – Commercial
Ideal For: Mid-rise buildings, schools, hospitals, and high-traffic office buildings
Commercial (CW) Class products are built to withstand frequent use and harsh environmental conditions. They meet stringent standards for structural performance, water penetration, and air infiltration, making them the ideal solution for demanding commercial applications.
AW Class – Architectural
Ideal For: High-rise buildings or applications requiring maximum durability
Architectural (AW) Class represents the highest level of performance in the industry. These products are rigorously tested for extreme structural loads, long-term durability, and thermal performance. Perfect for high-rise construction, coastal applications, and any project where performance is non-negotiable.
Why Performance Class Matters
Choosing the correct performance class ensures your windows and doors will:
- Meet code requirements and building standards
- Perform effectively in specific climates and building types
- Last longer and require less maintenance
- Enhance occupant comfort and safety
XL Assurance: Performance Backed by Service
Even with top-rated products, unexpected issues can occur. If a window or door ever fails or leaks, XL Building Products Co. acts fast. We deploy a qualified response team to the job site to diagnose and resolve the issue—whether it’s due to product failure or installation. Our rapid-response approach ensures peace of mind and long-term satisfaction.
