# Problems guides

> Cracks, settling, bowing walls, sticking doors and water: what each symptom means and which test proves it. Independent guidance from Foundation Repair Lab.

Canonical: https://foundationrepairlab.com/problems/

Last updated: 2026-11-08

## Read the crack before you read the quote

Most foundation problems announce themselves long before anything structural fails: a crack that widens, a door that stops closing, a floor that slopes toward one corner. The diagnosis is in the pattern, the direction and the rate of change — not in the size of the crack alone.

 |
 | Symptom | Likely cause | What proves it | Typical response

 | Vertical crack in a basement wall | Concrete shrinkage, often harmless | Width stable over 12 months; no displacement | Epoxy or polyurethane injection if leaking

 | Stair-step crack in block | Differential settlement of a footing | Level survey; crack monitor | Piers under the settled corner

 | Horizontal crack in a block wall | Lateral soil pressure, bowing | Plumb measurement; wall survey | Carbon fibre, anchors or rebuild

 | Doors and windows stick | Frame racking from movement | Check square of openings; floor level | Diagnose the cause before adjusting

 | Sloping or bouncy floor | Joist or footing settlement | Crawl space inspection; laser level | Piers, joist repair or slab lifting

 | Water in the crawl space | Grading, downspouts, water table | Moisture readings; drainage survey | Drainage first, encapsulation second

 | Gap between wall and ceiling | Framing movement or settlement | Measurement over time | Engineer if growing

## The three measurements that matter

**Width.** A hairline crack under 1/16 inch that has not changed in a year is usually cosmetic. A crack over 1/8 inch, or one that has widened since you last looked, is worth an engineer.

**Displacement.** Run a finger across the crack. If one side is proud of the other, the wall has moved in or out of plane — that is a structural signal, not a cosmetic one.

**Rate.** Install a $20 crack monitor and read it monthly. A crack that moves 1/16 inch in a season is a different problem from one that moved in 2015 and stopped.

## What NOT to do first

- Do not patch a moving crack with hydraulic cement and call it repaired — it will reopen and hide the evidence.

- Do not let a contractor quote piers before anyone has measured floor levels or inspected the crawl space.

- Do not treat a wet basement as a structural problem until drainage is fixed; water is often the cause, not the symptom.

- Do not accept "all houses settle" as an answer to a crack that is actively widening.

## Symptoms that are not foundation problems

Sticking doors in a humid summer, a crack above a doorway from a previous renovation, and a slab crack that follows a control joint are usually not structural. The test is whether the movement is progressive and whether it is tied to a load path. A $300 engineer's inspection is cheaper than a $12,000 pier system sold to fix a humidity problem.

The [foundation types hub](/types/) explains which failures belong to slab, crawl space, basement and pier-and-beam construction, and the [repair methods hub](/repairs/) covers what each fix does. Start with the [crack types guide](/foundation-crack-types/) if the symptom is a visible line.

### When should I worry about a foundation crack?

When it is wider than 1/8 inch, when one side is displaced, when it is horizontal in a block wall, or when it is growing. Width alone is not the test — change over time is.

### Can a foundation problem fix itself?

No. Soil movement can pause in a dry season, but the void and the lost bearing capacity remain. Monitoring is reasonable; assuming it is over is not.

### How much does an inspection cost?

A structural engineer typically charges $400–$1,500 for a site visit and a stamped letter. Contractor inspections are usually free — and usually end in a quote, which is why the independent letter matters.

## Guides in Problems

- [Basement Waterproofing Problems and Limits](https://foundationrepairlab.com/basement-waterproofing-problems/)
- [Bowing Basement Guide](https://foundationrepairlab.com/bowing-basement-wall/)
- [Bowing Walls Repair: What It Costs and How to Fix](https://foundationrepairlab.com/bowing-walls-repair/)
- [Cracks in Brick Veneer: Causes and Repair Costs](https://foundationrepairlab.com/brick-crack/)
- [Carbon Fibre Strap Problems: Bond, Bow, Limits](https://foundationrepairlab.com/carbon-fibre-straps-problems/)
- [Crack Injection Problems: Wet Cracks That Return](https://foundationrepairlab.com/crack-injection-problems/)
- [Crawl Space Encapsulation Problems and Limits](https://foundationrepairlab.com/crawl-space-encapsulation-problems/)
- [Differential Settlement Explained: Causes and Fixes](https://foundationrepairlab.com/differential-settlement/)
- [Expansive Clay Repair: Managing a Swelling Soil](https://foundationrepairlab.com/expansive-clay-repair/)
- [Expansive Clay Soil and Foundation Movement](https://foundationrepairlab.com/expansive-clay-soil/)
- [Foundation Crack Repair: When to Fix and What It Costs](https://foundationrepairlab.com/foundation-crack-repair/)
- [Foundation Crack Types and What Each Means](https://foundationrepairlab.com/foundation-crack-types/)
- [Foundation Heave: When the Ground Pushes Up](https://foundationrepairlab.com/foundation-heave/)
- [Foundation Heave Repair: When the Ground Pushes Up](https://foundationrepairlab.com/foundation-heave-repair/)
- [Movement vs Settlement: What Is the Difference](https://foundationrepairlab.com/foundation-movement-vs-settlement/)
- [Foundation Settlement Repair: Methods and Costs](https://foundationrepairlab.com/foundation-settlement-repair/)
- [Foundation Settling Repair: Stage by Stage](https://foundationrepairlab.com/foundation-settling-repair/)
- [Signs a Foundation Is Settling: What to Measure First](https://foundationrepairlab.com/foundation-settling-signs/)
- [French Drain Problems: Clogs, Slopes, and Failures](https://foundationrepairlab.com/french-drain-problems/)
- [Frost Heave and Foundation Damage: What It Costs to Fix](https://foundationrepairlab.com/frost-heave/)
- [Gap Between Wall and Ceiling: Causes and Repair Costs](https://foundationrepairlab.com/gap-between-wall-and-ceiling/)
- [Helical Pier Problems: Torque, Soil, and Limits](https://foundationrepairlab.com/helical-piers-problems/)
- [Horizontal Foundation Cracks: Cause and Repair](https://foundationrepairlab.com/horizontal-foundation-crack/)
- [Horizontal Foundation Crack Repair: Methods That Hold](https://foundationrepairlab.com/horizontal-foundation-crack-repair/)
- [How to repair a cracked foundation](https://foundationrepairlab.com/how-to-repair-a-cracked-foundation/)
- [How to repair foundation cracks](https://foundationrepairlab.com/how-to-repair-foundation-cracks/)
- [Mudjacking Problems: Limits and Failed Lifts](https://foundationrepairlab.com/mudjacking-problems/)
- [Pier and Beam Leveling Problems and Limits](https://foundationrepairlab.com/pier-and-beam-leveling-problems/)
- [Polyurethane Foam Lifting Problems and Limits](https://foundationrepairlab.com/polyurethane-foam-lifting-problems/)
- [Push Pier Problems: Limits and Failure Modes](https://foundationrepairlab.com/push-piers-problems/)
- [Root Barrier Problems: Depth, Gaps, and Tree Stress](https://foundationrepairlab.com/root-barrier-problems/)
- [Slab Cracks: Control Joints vs Damage](https://foundationrepairlab.com/slab-crack/)
- [Slab Cracks Repair: Seal, Lift, or Replace](https://foundationrepairlab.com/slab-cracks-repair/)
- [Slab Lifting Problems: Failure Modes and Limits](https://foundationrepairlab.com/slab-lifting-problems/)
- [Sloping Floors: Structural or Cosmetic?](https://foundationrepairlab.com/sloping-floor/)
- [Sloping Floors Repair: Diagnosis and Cost](https://foundationrepairlab.com/sloping-floors-repair/)
- [Soil Stabilisation Problems and Limits](https://foundationrepairlab.com/soil-stabilisation-problems/)
- [Stair Step Cracks Repair: Reading the Diagonal](https://foundationrepairlab.com/stair-step-cracks-repair/)
- [Stair-Step Cracks in Brick and Block: What They Mean](https://foundationrepairlab.com/stair-step-foundation-crack/)
- [Sticking Doors and Foundation Movement: What to Check](https://foundationrepairlab.com/sticking-doors-foundation/)
- [Sticking Doors Repair: Foundation or Hinge?](https://foundationrepairlab.com/sticking-doors-repair/)
- [Sump Pump Problems and Limits: A Diagnostic Guide](https://foundationrepairlab.com/sump-pump-problems/)
- [Tree Roots and Foundations: What Actually Happens](https://foundationrepairlab.com/tree-roots-foundation/)
- [Tree Roots Repair: Damage, Barriers, and Cost](https://foundationrepairlab.com/tree-roots-repair/)
- [Underpinning Problems and Limits: What Goes Wrong](https://foundationrepairlab.com/underpinning-problems/)
- [Vertical Foundation Cracks: Causes, Measurement, and.](https://foundationrepairlab.com/vertical-foundation-crack/)
- [Wall Anchor Problems: Plates, Soil, and Limits](https://foundationrepairlab.com/wall-anchors-problems/)
- [Water in the Crawl Space: Causes and Fixes](https://foundationrepairlab.com/water-in-crawl-space/)