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What Are the Signs of Foundation Damage From Tree Roots?

Last updated October 25, 2026

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The short answer

Cracks in Walls and Floors

Cracks are the most obvious clue. You might see them in drywall, plaster, or masonry, often radiating from window or door corners. Hairline cracks can be harmless, but if they grow wider over a few months, the foundation may be moving.

Check both inside and outside your home. Outside, look at the mortar between bricks or blocks. A stair-step crack along the mortar is a classic sign of settlement. Inside, pay attention to cracks that reappear after you patch them, as that suggests ongoing movement.

  • New cracks in interior walls or ceilings
  • Cracks that widen over several weeks
  • Stair-step cracks in brick or block exterior
  • Gaps between the foundation and the sill plate
  • Cracks in the concrete slab or basement floor

Sticking Doors and Windows

When a foundation shifts, the frame of your home goes out of square. That makes doors and windows bind, stick, or refuse to latch properly. You might also notice gaps around the frame that let in drafts or water.

Test every door and window in the house, including interior ones. A door that used to close easily but now drags on the floor is a strong signal. If you need to sand or plane a door to make it fit, the movement may be recent.

Uneven or Sloping Floors

Stand in the middle of a room and look across the floor. A marble or a ball that rolls to one side is a sign of slope. You might also feel a dip or a hump when you walk across the room, especially in older homes.

Use a level on the floor, or place a long straight board and check for gaps underneath. A slope of more than a quarter inch over a few feet is worth attention. This kind of shift often traces back to soil movement under the foundation.

Visible Roots and Soil Gaps

Walk around the outside of your foundation and look for tree roots that have grown against the concrete or brick. Large roots can press against the wall and cause cracks. Also check for soil that has pulled away from the foundation, leaving a visible gap.

That gap, called a void, means the soil underneath is drying or shifting. Roots can also suck moisture from the soil, causing it to shrink, especially in clay-heavy ground. If you see roots near the foundation, do not cut them yourself, as that can harm the tree or cause sudden movement.

What to Do Next

If you notice any of these signs, start by tracking the changes. Take photos and measure crack widths over time. That record helps you and any professional understand whether the movement is active. Also check your downspouts and grading, since poor drainage can worsen root-related issues.

For a thorough look, consider a water damage inspection to see if moisture is entering through foundation cracks. If the foundation itself is shifting, local water damage pros can assess the situation and discuss options like foundation stabilization. In Detroit, where the ground freezes and thaws through the seasons, acting early can prevent larger problems.

  • Keep a log with photos and dates
  • Clear gutters and extend downspouts away from the foundation
  • Avoid planting new trees too close to the house
  • Water trees evenly during dry spells to reduce soil shrinkage
  • Consult a professional if cracks widen or floors slope

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Water keeps spreading into floors and walls, so it is worth acting early. Calls are answered 24/7.

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Frequently asked questions

Can tree roots actually break through a concrete foundation?

Yes, roots can grow into small cracks and widen them over time. They do not push through like a drill, but they exploit existing weaknesses. Large roots near the foundation can also displace soil, causing the foundation to settle unevenly.

Should I remove the tree if I suspect root damage?

Not necessarily. Removing a large tree can cause the soil to heave, which may worsen the problem. First, have a professional evaluate the situation. Sometimes pruning roots, installing a root barrier, or improving drainage is enough. Removal is a last resort.

How do I tell a harmless crack from a serious one?

Hairline cracks under an eighth of an inch are often cosmetic. Watch for cracks that widen, appear on both interior and exterior, or follow a stair-step pattern in masonry. If you can fit a coin in the crack, or if doors and windows start sticking, take it seriously.

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