Keeping Striped Bark Scorpions Out of Your Georgetown Home

Where Scorpions Actually Get In

The striped bark scorpion is the pest that generates the most panic calls in Georgetown, and the reason isn't rare - it's how the animal is built. Centruroides vittatus is thin enough to slide under a door sweep with room to spare, and it climbs stucco, brick and drywall about as easily as it crosses flat ground. A homeowner in Sun City or Cimarron Hills who finds one in a bathroom sink at 11 p.m. isn't dealing with a fluke; they're dealing with a pest that treats a house as more vertical space to explore, not a wall to stop at.

A striped bark scorpion does not need a gap you can see to get inside. It flattens against a weep hole in the brick veneer, slides under a door threshold that has worn thin, or follows a pipe penetration behind a washing machine or under a kitchen sink. Roofline gaps matter just as much: fascia boards that have pulled away, or a vent screen with a torn corner, give it a path down through the attic and into a wall cavity. In Sun City and Cimarron Hills, where slab foundations sit close to bare limestone, the ground itself is full of the same cracks the scorpion already knows how to use, so the house is often just the next crack over.

Once inside, a scorpion goes looking for moisture, which is why bathrooms, laundry rooms and kitchens turn up more often than bedrooms or living rooms. That single fact points to the real fix. A pest that gets in through small, specific gaps and then heads for the plumbing is a pest you keep out by closing the gaps, not by spraying the baseboards after the fact. The rest of this page is about where those gaps actually are on a Georgetown house, what closing them well looks like, and why a can of spray by itself keeps disappointing people.

Why a Spray Alone Doesn't Work

Weep holes are the small gaps left along the bottom of a brick veneer wall, spaced every few feet, and they're required by code to let moisture drain out from behind the brick. They're also close to exactly the size a striped bark scorpion needs. A house in Wolf Ranch or Berry Creek with standard brick veneer has dozens of these openings at ground level, and none of them are supposed to be sealed shut - doing that traps moisture and causes worse problems than a scorpion. The fix is a weep hole vent or mesh insert that blocks the gap's width while still letting air and water move.

Door thresholds are the other reliable entry point, and they fail in a specific way: the rubber or vinyl sweep along the bottom compresses and cracks over a few Texas summers, and once there's a gap of an eighth of an inch or more, a thin-bodied scorpion can get through it standing up. Garage door thresholds are usually the worst offender, since that door gets opened and closed the most and the seal wears fastest. Checking it is simple - close the door at night and look for light coming under it from outside. If light gets through, so does a scorpion.

• Weep holes along the brick veneer, sized for moisture control but wide enough for a scorpion to pass through
• Door thresholds worn or gapped enough to slide a piece of paper under on garages and exterior doors
• Pipe and cable penetrations behind the house where the line meets the slab and the seal has shrunk
• Roofline gaps at the fascia and soffit where a climbing scorpion drops from an overhanging live oak
• Expansion joints and hairline slab cracks that widen slightly as the foundation settles over time
• Window frames and utility boxes on the exterior wall where the caulk has cracked or pulled away

Yard Changes That Cut Down Harborage

Pipe penetrations are less visible but just as common. Every place a water line, gas line, dryer vent or cable runs through an exterior wall leaves a small gap around the pipe, usually filled with nothing more than the builder's original caulk, if that. Over time that caulk shrinks, cracks or falls out entirely, and the gap behind the dryer vent or the hose bib is often wide enough to miss without looking closely. These spots don't show up on a walk-around the way a cracked threshold does, which is why they get missed on a first pass and why a second, slower check around every pipe and vent usually finds something.

The roofline matters more than most homeowners expect, because a striped bark scorpion climbs a wall as readily as it crosses the ground. Gaps where the roofline meets the wall, gaps at the soffit, and any spot where a tree limb touches the roof all give a scorpion a route in above ground level. A live oak or cedar branch resting on the roof isn't just a maintenance issue - it's a bridge, and scorpions use it. Trimming branches back a few feet from the roofline closes off that route without needing to touch the house at all.

• Pull loose limestone rock and decorative rock beds back away from the foundation where they hold moisture
• Trim cedar and live oak branches back so they no longer touch the roofline or exterior walls
• Clear leaf litter and woodpiles away from the slab edge instead of stacking them against the house
• Fix dripping hose bibs and irrigation heads near the foundation that keep the soil underneath damp

Entry Points and What Closes Them

What actually closes these gaps is unglamorous: a good silicone or polyurethane sealant at every pipe penetration, weep hole vents sized to fit rather than jammed in, new door sweeps where the old ones have compressed, and screening over any vent that doesn't already have it. None of this is a single afternoon's work on most Georgetown houses, because a typical slab-on-grade home has thirty or more weep holes alone, plus every door threshold, hose bib and utility penetration around the perimeter. Doing it properly means walking the entire exterior once, methodically, rather than sealing the one gap that happened to be visible from the driveway.

Older houses in Old Town and the handful of pier-and-beam properties out toward Weir and Walburg have a different problem: a foundation vent or an access door instead of a slab edge, and those openings are larger and easier for a scorpion to use than a weep hole ever is. A vent cover with fine mesh, rather than the wide louvers many of these homes still carry, closes that gap. Most Georgetown housing built since the 1970s is slab-on-grade, so this only applies to a smaller, older slice of the market, but it's worth checking if the house predates that.

Getting the Timing Right

A perimeter spray treats the ground and the base of the walls, and it works on pests that walk across that ground and pick up the residue on their legs. A scorpion that comes in eight feet up, over a soffit gap or along a tree limb touching the roof, never crosses that treated strip at all. That's the core problem with relying on spray alone against a climbing pest: it protects the route most insects use and leaves the route this one actually takes untouched.

A spray along the baseboards feels like progress, but a striped bark scorpion crossing that line days later just walks over it. The residue breaks down, and the scorpion was never trying to cross the living room floor anyway — it came in low and close to the wall, through a gap it could already fit through. Closing the gap at a weep hole on a Berry Creek or Cimarron Hills home, or resealing a threshold on a Water Oak house backing onto a greenbelt, removes the entry point permanently. The spray only ever addressed what was already inside, and only for as long as the chemical lasted.

Yard Work That Helps West of I-35

Outside the house, harborage is the word for anywhere a scorpion can hide during the day and come out at night - loose rock, stacked firewood, leaf litter, boards left on the ground, landscaping timbers. Limestone country like the west side of Georgetown naturally has more loose rock lying around than the Blackland Prairie side toward Hutto and Taylor, so yards backing onto a greenbelt or built on the DB Wood Road side of town tend to carry more harborage by default, on top of whatever a homeowner adds with a woodpile or a stack of pavers.

Harborage is the bigger lever than most people expect. A stack of landscaping stone, a pile of cedar brush, or leaf litter left against the slab all hold the shade and moisture a scorpion wants during a Georgetown summer, and clearing that gap between plant beds and the foundation removes a hiding spot faster than any spray. Along the San Gabriel River and anywhere backing onto cedar and live oak cover, the ground cover regrows quickly, so this is work that has to be repeated through the season rather than done once in spring and left alone.