Guide scope
This is general homeowner education, not medical, legal, insurance, engineering, emergency, or contractor advice. When a problem involves hazards, symptoms, permits, claims, or structural risk, contact the qualified professional or agency that handles that issue.
What to do now
- Step 1
Photograph cracks with a ruler or coin for scale.
- Step 2
Check doors, windows, floors, and exterior drainage for matching movement clues.
- Step 3
Avoid signing a large repair proposal before understanding cause, method, and warranty terms.
DIY vs professional help
| Usually DIY | Call a professional |
|---|---|
| Small, clean, recent issue with no safety flags. | Contamination, hidden moisture, structural movement, asbestos, smoke, or recurring damage. |
| Basic documentation, ventilation, and cleanup after safety is confirmed. | Testing, containment, drying verification, abatement, structural diagnosis, or insurance documentation. |
Scope and severity checks
Foundation decisions start with movement clues: crack width, crack direction, sticking doors, sloped floors, drainage, and whether the pattern is changing.
| Check | Why it changes the next step |
|---|---|
| Crack pattern | Stair-step, horizontal, vertical, and widening cracks point to different causes. |
| Water and grading | Poor drainage can mimic or worsen structural movement. |
| Repair method | Sealant, drainage correction, piers, slab jacking, and wall anchors solve different problems. |
Insurance and documentation
Photograph cracks with a ruler for scale, note dates, doors or windows that stick, floor slopes, exterior drainage, and any recent plumbing, grading, storm, or tree-root changes.
Keep engineer letters, repair proposals, warranty language, drainage recommendations, and insurer correspondence together. Coverage depends on policy language and cause, not on the presence of cracks alone.
Movement vs. crack appearance
A 1/8-inch crack that is not changing may be cosmetic. The same width crack that is widening, stair-stepping, or accompanied by sloping floors or stuck doors suggests active movement. Measure and photograph over weeks, not days.
Drainage first, structural second
Many foundation issues start with water against the wall. French drains, grading, gutter extensions, and sump systems often precede or accompany structural repairs. Fixing the structure without fixing the water source frequently leads to repeat movement.
Questions before hiring
- What cause does this estimate solve?
- Why this repair method instead of a cheaper one?
- What warranty applies if movement continues?
- What is excluded from the written estimate?
- What documentation will I receive when the work is done?
Common questions
Are all foundation cracks structural?
No. Hairline shrinkage cracks differ from widening, horizontal, stair-step, or displacement cracks.
Should I repair drainage first?
Often, yes. Water against the foundation can be the cause or a worsening factor.
When should I call an engineer?
Call when movement is active, large, horizontal, or tied to sloping floors and stuck doors.
When should I call an engineer vs. a repair contractor?
Call an engineer when movement is active, large, or you need an independent assessment for insurance or permitting. A repair contractor can propose a fix once the cause is understood.
What warranty language is realistic?
Look for warranty on the specific repair method, what movement it covers, transferability, and what voids it. Lifetime warranties on the house are marketing language; read the actual terms.