Graboyes visits Reveal Windows & Doors, a premier timber frame curtain wall manufacturer Graboyes Commercial 7 years ago Reveal Windows & Doors' timber frame curtain wall system is a turn-key alternative to standard aluminum storefront/curtain wall. The solution is perfect for high-end residential and many commercial applications including boutique retail and hospitality projects. Source: Los Angeles-based Reveal Windows & Doors, www.revealwd.com. Reveal Windows & Doors' timber frame curtain wall system is a turn-key alternative to standard aluminum storefront/curtain wall. The solution is perfect for high-end residential and many commercial applications including boutique retail and hospitality projects. Source: Los Angeles-based Reveal Windows & Doors, www.revealwd.com. Graboyes' senior project manager Les Schlemback (right) and Reveal Windows & Doors' VP of Operations Eric Hans discuss the installation process for timber frame curtain wall at Reveal's Los Angeles-based facility.