The Moment You Notice It
You're grabbing something off the shelf near the garage door and you see it: a thin line of daylight running along the bottom edge. Or maybe it's not light — it's a trail of sand and dead leaves that somehow ended up two feet inside the garage, or a line of ants marching in from outside, or that musty smell after last week's afternoon downpour. All of these point to the same culprit: a worn-out bottom seal or weatherstripping.
It's one of the cheapest, most overlooked parts of a garage door, and in this part of Florida it works harder than almost anywhere else.
Why This Matters More Here Than Most Places
Groveland's climate is tough on rubber and vinyl. Heat and UV exposure dry out seals and make them crack. Humidity causes the garage door panel itself to swell slightly, which can pull a seal loose at the edges. And when the afternoon storms roll in during hurricane season, wind-driven rain doesn't fall straight down — it comes in sideways and finds any gap along the bottom of the door. A failed seal doesn't just let in dust and bugs; it lets in water that can sit against a wood door panel, warp it, or rust steel hardware over time.
If your garage stores tools, a freezer, lawn equipment, or anything you don't want sitting in humid, buggy air, the bottom seal is doing more work than people give it credit for.
Tools You'll Need
- Replacement bottom seal (T-style, bulb-style, or beaded, depending on your door's track — check your current seal's shape before buying)
- Utility knife
- Tape measure
- Soapy water or silicone spray (as lubricant for feeding the seal into the track)
- Rag or towel
- Step stool (optional, for taller doors)
Step-by-Step: Replacing a Bottom Seal
- Open the door partway so you can access the bottom edge comfortably without bending all the way to the floor, then disconnect the opener or set it to manual if you're worried about it cycling.
- Pull the old seal out of the aluminum retainer track along the bottom of the door. It usually slides out sideways; if it's brittle or cracked, it may come out in pieces — that's fine.
- Clean the track with a rag, removing dirt, dead insects, and old caulk or adhesive. This is also a good moment to check the track itself for rust or bent edges, especially if you're near any salt air influence.
- Measure the door width and cut the new seal about an inch longer than needed, so you have slack to work with.
- Lubricate the new seal lightly with soapy water or silicone spray so it feeds into the track smoothly instead of binding.
- Feed the seal into the track starting from one end, working it through until it runs the full width of the door.
- Trim the excess flush with each end using the utility knife.
- Close the door and check the fit. Stand inside the garage with the lights off during daylight — if you still see light gaps, the seal may be the wrong profile for your track, or the door itself may be sitting unevenly.
What's DIY and What Needs a Technician
Replacing the bottom seal itself is one of the most homeowner-friendly garage door jobs there is — it's cheap (national ranges typically run $10–$40 for the seal itself), takes under an hour, and doesn't involve the door's springs or cables.
Where it's time to call in a technician: if the door won't close flush no matter the seal, if the bottom panel is visibly warped or rusted through, if the track itself is bent or pulling away from the door, or if you notice the seal keeps failing quickly in the same spot — that often points to a door that's slightly off its rollers or a leveling issue, not just an old seal. Side and top weatherstripping (the vinyl strips along the sides and header of the door) can also be trickier to source and fit correctly, especially on older doors where the track style has been discontinued.
When to Call Groveland Door & Opener
If you've replaced the seal and still get water, drafts, or light coming through, or if the door doesn't sit level against the weatherstripping, that's a sign the door needs attention beyond the rubber trim. Our Garage Door Tune-Up & Maintenance service checks the rollers, tracks, and hinges that affect how well a door seats against its weatherstripping, and if the panel itself has taken on moisture damage or rust, our Garage Door Installation & Replacement service can walk you through whether a repair or a new door makes more sense before the next round of storms.
If you're noticing drafts, bugs, or water under your garage door anywhere in Groveland, Clermont, Mascotte, Minneola, Leesburg, Tavares, Mount Dora, or Montverde, give Groveland Door & Opener a call — we'll get it sealed up right before the next downpour finds its way in.