Protective barriers for exterior doorways in commercial buildings are often fabricated from aluminum and designed to seal gaps against the elements. These barriers prevent air infiltration, water leakage, and dust intrusion. For instance, a retail store entrance might utilize such a system to maintain a comfortable interior climate and protect merchandise from outside elements.
Effective perimeter seals contribute significantly to energy efficiency by reducing the load on heating and cooling systems. They also enhance soundproofing, improve fire safety by limiting smoke spread, and protect the door and frame from damage caused by moisture and temperature fluctuations. Historically, simpler materials like felt or rubber were common, but advancements in material science have led to the widespread adoption of more durable and effective aluminum extrusions with specialized gaskets.