If ants from a neighbor’s property are invading your home, act quickly to protect your perimeter and coordinate a shared response with neighbors.

Start by identifying entry points and trails by following the ants from where you see them back to exterior gaps, vents, and the foundation. Treat your perimeter aggressively using a two-part approach: apply a residual liquid or granular barrier labeled for perimeter control along the foundation and under eaves, and place bait stations in areas where ants are active so they can carry poison back to the colony. Seal cracks and gaps larger than a few millimeters with silicone caulk and install door sweeps on exterior doors to reduce ingress. Remove attractants by storing food in airtight containers, cleaning spills immediately, and trimming vegetation that touches your siding to reduce bridges. If you use products, choose long-lasting formulations and follow label directions for reapplication intervals and safety around children and pets. Keep a written log of products used, dates of application, and observed activity so you can determine whether treatments are reducing the problem or if additional measures are needed.

Common mistakes include treating only visible ants without addressing the perimeter or colony, which wastes time and money; the fix is to combine baits that ants will take back to the nest with exterior barriers to reduce new foragers. Another issue is poor communication with neighbors, leading to reintroduction from untreated yards; the remedy is to politely share your observations, coordinate treatment timing, and agree on similar product types and application schedules. A third problem is using repellents that simply scatter ants into adjacent homes instead of eliminating colonies; avoid nonpersistent sprays near trails and instead focus on baiting and perimeter control so the colony is targeted rather than displaced.

We run BigHomeProjects.com to connect homeowners with local contractors and to help contractors find work related to pest exclusion and home perimeter repairs. We also host a discussion community where neighbors can compare notes, coordinate treatments, and share contractor referrals.

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