How to Prevent Termites in Your Wood Frame Home

Prevent termites by eliminating moisture sources, removing wood-to-soil contact, sealing entry points, and maintaining proper ventilation around your home's foundation and wooden structures.

1. Dry Out Your Foundation First. Fix all leaks in plumbing, roofing, and gutters immediately. Ensure proper drainage around your foundation by grading soil away from the house. Install vapor barriers in crawl spaces and use dehumidifiers in basements. Termites need moisture to survive, so keeping your home dry is your first line of defense.
2. Lift Wood Off Ground. Inspect your home's perimeter for any wooden structures touching the ground. Raise deck posts, stairs, and siding at least 6 inches above soil level. Remove old stumps, fallen logs, and lumber piles from around your foundation. Replace any wooden elements in direct ground contact with concrete or metal alternatives where possible.
3. Block Every Entry Point. Install metal termite shields on foundation walls before wooden sill plates. Use concrete or steel supports instead of wooden posts where they meet the ground. Apply sand barriers around the foundation perimeter - termites cannot tunnel through properly sized sand particles. These physical barriers force termites to build visible mud tubes that you can spot during inspections.
4. Caulk All Foundation Gaps. Fill foundation cracks with concrete caulk or hydraulic cement. Seal gaps around utility lines entering your home with expanding foam or caulk. Check and repair damaged weatherstripping around doors and windows. Install fine mesh screens over foundation vents while maintaining proper airflow.
5. Keep Air Flowing Freely. Ensure crawl spaces have adequate cross-ventilation with vents spaced every 8-10 feet. Keep foundation vents clear of debris and vegetation. Install exhaust fans in high-moisture areas like bathrooms and kitchens. Proper airflow prevents the humid conditions termites prefer.
6. Treat Wood Chemically. Treat exposed wooden surfaces with borate-based wood preservatives, especially in basements and crawl spaces. Apply liquid termiticide to soil around the foundation perimeter according to manufacturer instructions. Consider installing bait stations around your property's perimeter as an early detection and elimination system.
7. Inspect Quarterly Year-Round. Inspect your home's foundation, basement, and crawl spaces every three months. Look for mud tubes on walls, hollow-sounding wood when tapped, discarded wings near windows, and small holes in wood surfaces. Schedule professional termite inspections annually, especially in high-risk areas.