The protective barrier installed at the base of a doorway, where the threshold meets the door, is essential for maintaining comfortable interior environments. This barrier seals the gap between the door and the floor, preventing the ingress of air, water, dust, insects, and other unwanted elements. Common materials used for this barrier include rubber, foam, felt, silicone, and vinyl, each offering different levels of durability and weather resistance.
A properly sealed threshold plays a significant role in energy efficiency by reducing drafts and minimizing heat transfer. This translates to lower energy bills and a smaller carbon footprint. Furthermore, this barrier protects against moisture damage, which can lead to wood rot, mold growth, and structural issues. Historically, simpler materials like felt were used, but advancements in material science have led to more durable and effective solutions. This evolution reflects a growing understanding of building science and the importance of a tightly sealed building envelope.
