Why clay moves
Clay swells when wet and shrinks when dry. Over time, that movement can stress foundations, slabs and walls. In the St. Louis area, flat ground and creek bottoms that drain slowly add to the challenge.
Steady soil moisture around the house is a big part of keeping a foundation stable.
Signs worth watching
Cracks that widen, doors that stick, floors that slope and gaps around windows are all clues. Take dated photos so you can tell if something is changing.
Hairline cracks are common. Wide or growing ones deserve a look.
Drainage fixes that help
Gutters and downspouts that carry water well away from the house, soil sloped away from the foundation and French drains where needed all reduce moisture swings.
Often drainage is the first and simplest fix.
When to call a specialist
If cracks grow, floors keep sinking or you see water inside, a foundation specialist can assess it. They may recommend piers, wall repair or drainage.
Ask for an honest assessment of whether repair is needed now or can wait.
