Springs
Garage Door Bottom Seal Replacement: Full Step-by-Step Guide
If you’ve got drafts, bugs, or rain sneaking under your garage door, chances are your garage door bottom seal has seen better days. Replacing the weather seal is a quick DIY project that can dramatically improve your garage's insulation and keep out unwanted critters and debris.
Step-by-Step: Replace Your Garage Door Bottom Seal
Step 1 – Measure Before You Remove
- Raise your garage door to a comfortable height.
- Measure the full width of the garage door and add 1 inch to each side (total +2 inches) to allow for adjustments.
- Measure the width of the door bottom and, if possible, the width of your current gasket.
- Only remove the seal after you've purchased a replacement.
Step 2 – Remove the Old Seal
- Back out the screws from the existing gasket or retainer bracket using a screwdriver.
- Be gentle—avoid denting or bending the bottom of the garage door.
Step 3 – Install the New Weather Seal
- Slide the new gasket into the existing retainer track or bracket sleeve.
- Position the seal so that it extends 1 inch beyond the edge of the door on both sides.
- Use the existing screw holes to reattach the seal, minimizing damage to insulation and the door surface.
Step 4 – Trim & Test
- Trim any excess length with a utility knife or fine-tooth saw. Take care not to nick the door.
- Lower the garage door and inspect the seal—it should contact the floor fully, with no visible gaps.
Pro Tips:
- Always release the door from the garage door opener before raising it by hand.
- Weather seals vary by brand and model—double-check compatibility with your door before purchasing.
Need Help Finding the Right Bottom Seal?
Garage door gaskets aren’t one-size-fits-all. We carry a wide selection of replacement garage door bottom weather seals designed to fit most standard and brand-specific models.
FAQs
Q: How do I know if my garage door seal needs replacing?
A: If you see daylight under the door, feel a draft, or notice water or dirt getting inside, it's time for a replacement.
Q: Can I install the bottom seal without removing the door?
A: Yes! You can install it with the door raised to a comfortable working height. Just make sure the opener is disengaged first for safety.
Q: What if my garage door doesn’t have a retainer bracket?
A: You may need to purchase and install a compatible bottom seal retainer if your current system is damaged or outdated.
Q: Will this fix stop water from entering my garage?
A: A new weather seal will greatly reduce water intrusion, but if your garage floor slopes or you live in a heavy rain area, you may also need a threshold seal.
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