Tree Roots and Foundations: When Landscaping Causes Damage

Tree Roots and Foundations: Can Tree Roots Damage Foundations?

Tree roots and foundations are often a recipe for foundation problems. As roots spread in search of moisture, they can shift soil, crack foundations, and weaken structural stability. Over time, this can lead to costly repairs that could have been avoided with proactive measures.

If you’ve noticed foundation cracks, uneven floors, or sticking doors, tree roots might be the hidden culprit. The good news? Root barriers and strategic landscaping can protect your home before the damage worsens.

Up next, we’ll break down how tree roots impact foundations—and what you can do to prevent costly repairs.

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Common Trees in Long Island That Damage Foundations

Certain tree species in Long Island are notorious for their invasive root systems, which can threaten home foundations. If planted too close to a structure, these trees can displace soil, cause foundation cracks, and compromise stability.

Here are some of the most problematic trees in the area:

• Norway Maple (Acer platanoides) – A non-native species with an extensive root system that can displace soil and weaken foundations.
• Silver Maple (Acer saccharinum) – Grows quickly with shallow, invasive roots that can crack sidewalks and foundations.
• Willow Trees (Salix spp.) – Extremely thirsty roots that seek moisture and infiltrate foundation cracks, leading to structural issues.
• Tree of Heaven (Ailanthus altissima) – An aggressive grower that damages sewers, sidewalks, and foundations, making it a major concern in urban areas.

To reduce the risk of foundation damage, plant these species at least 20 to 30 feet from your home. Installing root barriers can also help direct root growth away from your foundation, adding an extra layer of protection.

How Tree Roots Affect Foundations

Tree roots are constantly searching for water, and when they grow near a home, they can disrupt the stability of the foundation. While roots don’t physically “break” concrete, their impact on soil movement and moisture levels can lead to foundation cracks and settlement issues.

Here’s how tree roots affect your foundation:

• Moisture Competition – Tree roots absorb large amounts of water, especially in clay-rich soil. As the soil dries, it contracts, creating gaps beneath the foundation, which can lead to uneven settling.
• Soil Shifting – Expanding root systems displace soil, creating uneven pressure around the foundation. This movement can contribute to cracks and structural instability.
• Direct Intrusion – While rare, roots may exploit existing foundation cracks, forcing them wider and allowing moisture infiltration.
• Aggressive Root Systems – Some trees are more likely to cause foundation issues due to fast-growing and moisture-seeking roots. 

The biggest culprits include:

• Willows – Extremely thirsty roots that aggressively search for water.
• Oaks – Large, expansive roots that spread wide and deep.
• Maples – Fast-growing roots known to lift sidewalks and disturb structures.

If any of these trees are too close to your home, proactive solutions like root barriers and soil management can help minimize the risk of foundation damage.

Signs Your Foundation Is Being Damaged by Tree Roots

Not sure if tree roots are affecting your foundation? Look for these warning signs   before the damage worsens:

• Foundation Cracks – Visible cracks, especially those widening over time, may indicate that tree roots are shifting the soil beneath your foundation, creating pressure that leads to structural fractures.
• Uneven or Sloping Floors – If your floors feel unstable or slanted, moisture loss and soil shifting could be causing sections of the foundation to settle unevenly.
• Gaps Around Doors & Windows – Sticking doors, misaligned windows, or uneven gaps can indicate that the foundation is shifting due to soil movement from root growth.
• Visible Tree Roots – Large roots creeping toward or pressing against your foundation could already be weakening its stability.

Early detection can prevent costly repairs.

Noticing These Signs? Schedule a Professional Foundation Inspection Today.

How to Prevent Tree Root Damage to Your Foundation

Preventing tree root damage requires proactive planning and strategic landscaping. Here’s how to protect your foundation from shifting soil and cracks:

• Install Root Barriers – Root barriers, made from plastic or metal, are installed underground to redirect tree roots away from the foundation. Installing them early can prevent long-term structural issues.
• Strategic Tree Placement – When planting new trees, position them at least 20–30 feet away from your home to minimize the risk of root intrusion.
• Manage Soil Moisture Levels – Inconsistent moisture causes soil to expand and contract, leading to foundation movement. Regular watering around your home can help stabilize the soil and prevent root-related shifts.
• Reinforce the Foundation – If damage has already occurred, consider underpinning, installing piers, or reinforcing the foundation to prevent further deterioration.

Taking preventative action today can reduce the risk of expensive foundation repairs.

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When to Remove Trees Near Your Foundation

In some cases, tree removal is the only viable solution to prevent further foundation damage. However, removal should be carefully considered, as mature trees provide shade, improve air quality, and help stabilize soil.

• Extent of Damage – If a tree has already caused extensive foundation cracks or significant soil shifting, removal may be necessary to prevent worsening structural issues.
• Risk Assessment – Determine whether the tree’s continued growth is likely to cause additional damage or if the situation is stable.
• Alternatives to Removal – If the tree is valuable to your landscape, root pruning or installing a root barrier may help mitigate its impact without requiring full removal.
• Professional Evaluation – Before making a decision, consult with a foundation expert or arborist to assess the risks and determine the best course of action.

Understanding the risks and available solutions will help homeowners make the most informed decision for both their trees and their home’s foundation.

Concerned About Tree Roots Near Your Foundation? Schedule a Consultation Today.

Final Thoughts: Protecting Your Foundation from Tree Root Damage

Tree roots and foundations don’t always mix, but proactive landscaping and preventative measures can help homeowners preserve structural stability and avoid costly repairs. Installing root barriers, planting trees at a safe distance, and maintaining proper soil moisture levels can reduce the risk of foundation damage.

If you’ve noticed foundation cracks, soil shifting, or visible roots near your home, addressing the issue early can prevent more severe structural problems. A professional inspection can help assess the risks and recommend the best course of action.

Protect Your Foundation from Tree Root Damage – Get a Professional Consultation Today.