Installing doors and windows involves selecting and fitting various materials and components, such as frames, sashes, glazing, and hardware. Essential tools include measuring tapes, levels, and power tools. Professionals involved include carpenters, glaziers, and engineers. Services range from installation to maintenance and repairs. Leading manufacturers include Andersen, Pella, and Jeld-Wen. Industry associations, such as the American Architectural Manufacturers Association (AAMA), promote industry standards and provide resources for professionals.