Abstract: A garage door bottom seal assembly includes a garage door bottom panel presenting a pair of elongated, laterally spaced apart bottom wall sections, and an elongated intermediate wall section extending between the bottom wall sections and presenting a recess extending along the length of the bottom panel. An elongated seal support presents an upstanding connector element extending along the length thereof and is located within the recess. The intermediate wall section is formed to interfit with the connector element at locations along the length of the intermediate wall section for securing the seal support to the bottom panel. An elongated, resilient seal is operatively coupled with the seal support. Preferably, the seal and seal support present an astragal seal which can be affixed to the normal groove structure of a conventional tongue and groove garage door panel.