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Pest-Proofing Your Home for Winter

A San Antonio winter pest-proofing checklist to keep rodents, roaches and spiders out when the weather cools, from sealing gaps to attic and garage checks.

By Time's Up Pest Control. Published 2026-10-22.

Key Takeaways

• Mild San Antonio winters don't stop pests, but cooler nights do push them indoors.
• Rodents are the biggest winter problem, so seal gaps along the roofline and foundation.
• Door sweeps, weatherstripping and screened vents keep out most pests.
• Firewood, clutter and open food sources draw pests inside during the cooler months.

San Antonio winters are short and mild, but the first cold fronts still send pests looking for warmth. Rodents, roaches, spiders and overwintering insects start moving into attics, garages and wall voids. A few hours of work in late fall can keep them out until spring.

Seal the Outside

Roofline and attic

• Check roof returns, soffits and fascia for gaps. Rodents often get in where the roof meets the wall.
• Make sure gable, ridge and soffit vents have intact screens.
• Seal gaps around plumbing vent pipes.
• Trim tree branches back from the roof so rats and squirrels can't jump onto it.

Foundation and walls

• Caulk gaps where pipes, cables and AC lines enter the house.
• Seal cracks in the foundation and around windows.
• Cover weep holes with weep hole screens made for brick, which keep pests out without blocking airflow.
• Remember that mice fit through gaps about the size of a dime.

Doors and garage

• Install door sweeps on exterior doors, including the door between the garage and the house.
• Replace worn weatherstripping around doors and windows.
• Check the garage door's bottom seal. Gaps at the corners are a common rodent entry point.

Clean Up the Yard

• Stack firewood off the ground and at least 20 feet from the house if you can. Bring in only what you'll burn right away.
• Rake leaves and remove debris piles along the foundation.
• Clean gutters so water drains properly through winter rain.
• Keep trash can lids tight, and don't leave pet food outside.

Check Inside

• Attic: look for droppings, nesting material and gnawed wires. Our guide on rats and mice in the attic covers the signs.
• Garage and storage: move items into sealed plastic bins instead of cardboard.
• Kitchen and pantry: store food in sealed containers, especially holiday baking supplies.
• Holiday decorations: check boxes from the attic for droppings or spiders before bringing them inside.

Don't Forget Roaches

German roaches stay active all winter in warm kitchens. Keep counters, floors and the space behind appliances clean, and fix leaks under sinks.

Winter Is a Good Time for a Termite Check

Termites keep feeding through mild winters, and spring swarm season isn't far off. A winter inspection catches problems before they spread. See signs of termites.

How Time's Up Pest Control Can Help

Time's Up Pest Control can inspect your home for winter entry points, treat for rodents and insects, and keep protection in place through a prevention plan. Call for a free estimate, or see what's active the rest of the year in our seasonal pest guide.

Frequently Asked Questions

Do pests go away in the winter in San Antonio?

Not really. Mild winters keep many pests active, and cooler nights push rodents and insects indoors.

When should I pest-proof for winter?

Late October through November is ideal, before the first strong cold fronts arrive.

What is the most common winter pest in San Antonio?

Rodents, especially roof rats and house mice moving into attics and garages.

Contact Time's Up Pest Control

Time's Up Pest Control is a family-owned San Antonio pest control company serving homes and businesses. Licensed technicians (TPCL #877175), free estimates, satisfaction guarantee and 24/7 emergency service.

Phone: (210) 868-2267

Email: info@timesupbugs.com

Address: 1800 NE Interstate 410 Loop, Suite 216-B, San Antonio, TX 78209

Services: Pest Control, Termite Control, Pest Prevention, Commercial Pest Control