Certifications / WDI

Window & Door Institute Certification

Installer certification focused on window and door installation knowledge, weatherproofing, flashing, and warranty-compliant practices.

What Is WDI Certification?

WDI certification verifies installer knowledge across rough opening preparation, flashing, anchoring, shimming, air sealing, insulation, and code-aware installation practices.

Why It Matters

Even excellent products can fail when installed poorly. Installer certification helps buyers distinguish contractors who understand water management, warranty requirements, and durable opening performance.

Details

Issuing BodyWindow & Door Institute (WDI)

RegionUnited States

ValidityPeriodic renewal required