This type of weather seal is designed to fit into a sawed groove, or kerf, along the doorjamb or stop molding. Commonly made from compressible materials such as foam or rubber, it creates a tight seal against the door edge when closed, effectively blocking drafts, moisture, and insects.
Such seals play a crucial role in improving energy efficiency by reducing air leakage around doors. This leads to lower heating and cooling costs and contributes to a more comfortable indoor environment. Additionally, these seals can help minimize noise infiltration from outside and protect against the ingress of dust and pests. Historically, simple forms of this sealing method have been utilized, but advancements in materials and manufacturing techniques have resulted in more effective and durable solutions.