Seals applied to the frames of hinged, double-paned exterior doors prevent air and moisture infiltration. These barriers, typically made of rubber, foam, felt, or metal, fill the gaps between the door panels and the frame, ensuring a tight closure. For instance, specialized compression seals or v-strips might be used to seal the meeting stiles in the center, while perimeter seals block drafts along the top, sides, and bottom.
Effective sealing significantly improves energy efficiency by reducing heat loss in winter and heat gain in summer, leading to lower energy bills and a smaller carbon footprint. Protection against drafts enhances indoor comfort, eliminates cold spots, and reduces noise transmission. Furthermore, preventing moisture ingress safeguards against damage to the door frame, flooring, and surrounding walls, preventing issues like rot, mold, and mildew. While rudimentary forms of sealing have existed for centuries, advancements in materials and design have led to highly effective and durable modern solutions.
