How small of a gap can a bark scorpion fit through?

Bark scorpions can squeeze through gaps as thin as a credit card — roughly 1/16 of an inch. This makes complete exclusion challenging but not impossible with thorough sealing.

What are the most common entry points for scorpions?

Common entry points include gaps under doors, around pipe penetrations, through weep holes in brick, torn window screens, gaps in sliding door tracks, and cracks in the foundation or stucco.

Can scorpions climb walls to get into my home?

Yes. Bark scorpions are exceptional climbers and can scale stucco, brick, and rough wood surfaces. They can enter through second-story windows, roof vents, and gaps in the roofline.

Do scorpions come in through the plumbing?

It is uncommon but possible. Scorpions can enter through gaps around pipes under sinks and behind appliances. Sealing these penetrations with caulk or foam is an important exclusion step.

Can scorpions enter through weep holes in brick homes?

Yes — weep holes are a very common scorpion entry point in Arizona brick homes. Weep hole covers that allow moisture to escape while blocking pests are an effective and inexpensive solution.

How do I seal my home against scorpions?

Install door sweeps on all exterior doors, seal pipe penetrations with caulk or foam, cover weep holes, repair torn screens, and seal cracks in stucco or foundation. A pest control professional can identify gaps you may miss.

Why do I keep finding scorpions inside even after sealing my home?

Scorpions already inside may be reproducing. A thorough interior treatment combined with exclusion is needed. Also check for gaps in the attic, around recessed lighting, and in wall voids where scorpions can travel unseen.

How Bark Scorpions Get Inside Your Home (And the 7 Entry Points You're Probably Missing)

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The Arizona bark scorpion is the only scorpion in North America that can climb smooth vertical surfaces — including stucco, drywall, and glass. This climbing ability, combined with a body that can compress to fit through a gap as thin as a credit card (roughly 1/16 of an inch), makes them uniquely capable of infiltrating homes that other pests can't enter. Understanding how they get in is the first step to keeping them out. The seven most common entry points our technicians find in Arizona homes are: gaps under exterior doors without door sweeps, damaged or missing weatherstripping around door frames, gaps around plumbing penetrations under sinks and behind washing machines, weep holes in brick and block construction, gaps around window frames and AC unit penetrations, attic vents without fine mesh screening, and cracks in the foundation or block wall where it meets the slab.

Block wall construction — extremely common in Arizona — is a particular vulnerability. The hollow cores of CMU (concrete masonry unit) blocks create a highway system that bark scorpions use to travel from the perimeter wall directly to your home's exterior. From there, any gap at the roofline, soffit, or where the block wall meets the house structure becomes a potential entry point. Weep holes — the small openings left in brick and block walls for drainage — are another overlooked entry point. Standard weep holes are large enough for bark scorpions to pass through easily. Weep hole covers with fine mesh screening are an inexpensive fix that makes a significant difference.

Sealing entry points is one of the most cost-effective long-term scorpion control strategies, but it works best in combination with professional perimeter treatments. At Pest Control Bros, our inspection process includes a systematic check of all seven entry point categories. We identify the gaps, recommend the right sealing solutions, and apply professional-grade treatments to the exterior perimeter that create a chemical barrier scorpions won't cross. If you've found a scorpion inside your home, the clock is ticking — call us for a same-week inspection in Maricopa, Chandler, Casa Grande, Tempe, Gilbert, and Mesa.