Brick walls look indestructible, which is why many St. Louis homeowners are surprised to learn that termites can be eating the wood inside. A classic St. Louis brick bungalow or two-family flat has masonry exterior walls, but its floors, joists, studs, window frames, stairs and roof are wood. Missouri sits in the heart of eastern subterranean termite territory, and the damp basements common to the city's older housing stock are an easy target.
Why St. Louis housing is exposed
Subterranean termites live in the soil and reach buildings through tubes built over foundation surfaces or through cracks as thin as a business card. Clay-heavy soils hold moisture, and the humid summers keep the ground damp. Old limestone and brick foundations develop mortar gaps. Wooden porches in neighborhoods such as Tower Grove, Benton Park and Carondelet frequently sit on masonry piers that touch the ground. Rear additions, finished basements with wood paneling, and decks built on posts can hide activity. Termites also like to follow plumbing, so basement bathrooms and laundry areas with leaks are common hot spots.
Formosan termites are not an established concern here; the eastern subterranean species is the one local inspectors focus on.
Signs to take seriously
- Swarming winged insects indoors in spring, often near basement windows or door thresholds.
- Earthen tubes on foundation walls, joists or piers, roughly the width of a pencil.
- Soft, blistered or hollow-sounding wood on window sills, door frames and baseboards.
- Sagging floors, sticking doors, or wallpaper that bubbles without a clear moisture cause.
- Discarded wings, like tiny translucent scales, in a window well or on a sill.
Inspection and treatment in an older brick house
An inspector examines the basement, crawl spaces, foundations, porch supports and any wooden structure near the soil. Because many St. Louis basements are finished or cluttered, inspectors may ask you to clear access to walls. If termites are found, common approaches include a liquid termiticide trench-and-treat along the foundation, drilling through slab floors or basement floors where concrete blocks the soil, or installing bait stations around the property. In brick homes with party walls, providers consider shared foundations and adjacent buildings. After treatment, many offer monitoring or annual inspections.
Lowering the risk
- Direct downspouts at least several feet from the foundation and keep gutters clean.
- Maintain grade so soil slopes away from the house.
- Fix leaking pipes, window wells and sump pump discharge lines.
- Replace wood-to-soil contact at porch steps and posts with concrete or treated materials.
- Have a wood-destroying insect inspection done before buying older property.
How to connect with a local pro
PestMinistry itself neither inspects nor treats. Call (844) 725-1661, describe your St. Louis property and what you have seen, and we will connect you with an independent licensed termite provider in our network who serves your area.
Termite questions in St. Louis
Can termites get through brick?
They cannot eat brick, but they pass through mortar cracks and tunnel behind veneer to reach wood.
When do termites swarm here?
Typically in spring, after warm, humid weather, though indoor swarms can occur at other times.
Is it safe to buy an older home with past termite damage?
It can be, with a thorough inspection and repair plan. Active infestations and structural damage need to be dealt with before closing.
Do termite treatments last forever?
No. Protection can wear off, so periodic inspections remain wise.