Protective barriers for doorways in commercial buildings, fabricated from metal and designed to seal gaps between the door and frame, are essential components. These barriers prevent the infiltration of air, water, and debris. Common materials used in their construction include aluminum, stainless steel, and bronze, selected for durability and resistance to corrosion. An example would be a stainless steel threshold combined with aluminum side and head seals on an exterior entrance.
Effective sealing systems contribute significantly to energy efficiency by minimizing air leakage, thus reducing heating and cooling costs. They also enhance sound insulation, improve indoor air quality by preventing the ingress of dust and pollutants, and protect against water damage. Historically, simpler materials like felt or rubber were used; however, advancements in material science and construction techniques have led to the development of sophisticated metal systems that offer superior performance and longevity.
