TL;DR
A bottom astragal is the flexible vinyl or rubber strip mounted in a retainer along the lower edge of a garage door that compresses against the floor to seal out water, wind, leaves, and rodents. Profiles vary, with T-ends, P-bulbs, and bead shapes sized to the door brand's aluminum retainer, and replacements slide in from the door's end after the old strip is cut out.
What it means
A bottom astragal is the flexible vinyl or rubber strip mounted in a retainer along the lower edge of a garage door that compresses against the floor to seal out water, wind, leaves, and rodents. Profiles vary, with T-ends, P-bulbs, and bead shapes sized to the door brand's aluminum retainer, and replacements slide in from the door's end after the old strip is cut out. On doors with photo-eye and pressure-reversal systems it also provides the give that lets the opener detect an obstruction without damage. Daylight visible under a closed door, or a strip gone stiff and cracked, is the signal to renew it.
Where it sits in the glossary
Bottom astragal is part of the Trade jargon group inside the ProFix Directory glossary. Browse every term in this category from the glossary index.
Why Ohio homeowners should know it
This is a term Ohio homeowners encounter when reading contractor quotes, hiring paperwork, or inspection reports. Understanding it well enough to ask one good follow-up question is usually all the protection a homeowner needs.
ProFix Directory keeps definitions short on the index page and saves the longer context — Ohio-specific rules, where the term comes from, and which ProFix tools touch it — for these per-term pages so the term is easy to cite and easy to share.
ProFix tools that touch this term
See also
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