Seeks qualified architectural, engineering, and building-envelope consulting firms and contractors to provide professional services for the investigation, evaluation, testing, design, repair, rehabilitation, maintenance and constructionphase observation of building-envelope systems. Building envelope includes, without limitation, roofing and waterproofing systems; exterior walls and cladding; masonry; air, water, vapor, and thermal-control layers; windows, curtain walls, storefronts, skylights, louvers, exterior doors, sealants, expansion joints, flashings, transitions, penetrations, below-grade waterproofing, plaza decks, balconies, canopies, and interfaces between envelope components.