26/02/2026
Foundation cracks aren’t always a “concrete problem.” Sometimes it’s tree roots + soil moisture changes.
If you own a home (or work in construction), this is worth a 60-second read.
What’s really happening:
◼️Most roots don’t “punch through” concrete like a movie.
◼️ They often damage foundations indirectly by changing soil moisture, which can trigger shrink/swell (especially in clay soils) → differential settlement → cracks, sticking doors, uneven floors.
The practical rule I use on site:
✅ Keep large trees at least ~20 ft (6 m) away from buildings.
◻️ It’s a rule-of-thumb—not a code clause—because risk depends on:
◽️ Tree species + water demand
◽️ Soil type (clays are high risk)
◽️ Foundation type (shallow foundations are more sensitive)
◽️ Drainage and irrigation patterns
If you already have a tree close to the house—don’t panic. Do this instead:
◾️ Look for symptoms: new/widening cracks, sticking doors/windows, sloping floors
◾️ Control water: fix drainage, avoid “wet/dry cycling” next to the footing
◾️ Get the right advice: arborist + foundation/structural review (before you cut anything)
◾️ Consider a root management plan: barrier/trenching only if designed and executed properly
If you know someone with a big tree close to their house, share this with them — this is one of those problems that’s cheap to prevent and expensive to ignore.
