How to Keep Scorpions Out of a Garage With a Door Seal

Keeping Scorpions Out of a Garage Starts at the Door

A tight bottom seal closes one of the main entry routes, but it's one part of exclusion, not the whole job. University of Arizona Cooperative Extension notes that scorpions can enter homes through poorly maintained door sweeps and window screens.^[1]

A scorpion doesn't need a large opening. Extension guidance on pest proofing says entry doesn't require a big gap, and it recommends tight-fitting door sweeps and weather-stripping.^[3]

The same publication doesn't give a gap measurement you should rely on. Treat any visible daylight as too much.

That leads to a simple test. Close the door and turn off the garage lights. Then look along the bottom from inside during the day, or from outside after dark with a flashlight behind the door.

Extension guidance says no light should be visible around the door.^[3] If you see a line of light anywhere, even a short stretch, that's a gap.

Seal and Gap Fixes That Help

Start with the bottom seal itself. A cracked, hardened, flattened or missing seal should be replaced, and the replacement should sit in its track without folds or damaged corners. Extension guidance recommends replacing door sweeps when necessary.^[1]

The step-by-step process is in our guide to replacing a garage door bottom seal.

Then look at the floor. Garage slabs are rarely perfectly flat, so a seal can touch the concrete in one spot and leave a gap a few feet over. Check for continuous contact along the full width, not just visible damage.

Where the slab dips, you may need to adjust the retainer or choose a seal designed for uneven floors.

Don't stop at the big door. Extension guidance recommends weather-stripping around loose-fitting doors and windows, which includes the side door into the garage and the side and top edges of the overhead door.^[2] For thresholds, it suggests adjusting or replacing them as needed.^[3]

Finally, look beyond the doors. The extension recommends caulking around pipes and other cracks, and plugging weep holes.^[2] Sealing utility openings helps reduce entry by scorpions and other nuisance pests.^[4]

If you have a professional do this work, garage door weatherstripping and seal replacement is a service worth asking about.

What a Door Seal Will Not Solve

A new seal doesn't guarantee a scorpion-free garage. Some may already be inside, and others can use vents, plumbing openings or wall voids.

Expect sightings to continue for a while after you finish sealing.

The extension also makes clear that scorpion management goes beyond the building. Pesticides alone cannot manage scorpions, so the university recommends modifying nearby habitat and prey-insect conditions too.^[1] In practice, that means clearing clutter, cardboard, firewood and rocks away from garage walls, fixing leaks, and cutting back on the insects scorpions feed on.

Reducing outdoor light that attracts insects can help lower prey around the home.^[5]

Recheck the seals before monsoon season and any time the rubber turns brittle or compressed.

For sting safety, symptoms and when to call for medical help, use the University of Arizona Cooperative Extension venomous wildlife guidance^[2] and contact Poison Control if someone is stung. For persistent activity, a licensed pest professional can inspect entry points that are hard to find yourself.