Tree Root Damage Repairs

Puget Sound Trusted Tree Root Damage Repairs | Action Asphalt

We repair damage to asphalt caused by tree roots. In this process, the affected area is excavated and root material removed. We then dispose of both the asphalt and organic spoils, re-compact the area and pave with hot mix asphalt. All patches are then sealed with hot tar seam sealer.

According to studies, more than 90% of all roads, parking lots, and airport runways in the United States are made with asphalt, encompassing a massive 18 billion+ tons of asphalt paving material. However, the greatest threat to the continued quality and consistency of asphalt surfaces is that of natural origin: tree roots.

Tree roots beneath pavement cause asphalt surfaces to bulge and deform, results in breaks, cracks, and buckles that compromise the integrity of the pavement itself. Most problem tree roots exist between 12-18 inches beneath the surface of the pavement and removal is not always easy.


There are several methods commonly used to prevent tree roots from causing cracking and bulging in existing asphalt surfaces:

– Manual Removal

By manually severing the problem roots beneath the surface of the ground, asphalt repair companies can cut and remove the root and prevent future growth. Alternatively, by severing the problem root from the tree itself using a shovel and chainsaw, you may prevent future invasion, but the tree may become unstable or unhealthy as a result.

– Copper Sulfate and Other Chemicals

While generally not advised due to the environmental concerns posed by using the compound in soil, copper sulfate has been proven to be an effective tool against invading tree roots. Roots absorb copper sulfate, transporting it a short distance. This ensures the portion of the root is destroyed without killing the parent tree, but the risks to the environment as a whole may be enough to prevent its use in many cities and counties.

– Separation Barriers

Once the root is removed or severed from the rest of the tree, you’ll want to establish a physical barrier between the healthy tree system and the asphalt pavement. Materials like sheet metal, chemical barriers, and synthetic fabrics are often used to prevent root expansion into unwanted areas, but no one root barrier solution can be considered 100% effective.