Your permit requires root investigation.

Toronto, Hamilton, Mississauga, and other GTA municipalities routinely condition development permits on exploratory root excavation to verify root locations before construction begins. Urban Forestry needs to know where roots are, what will be affected, and whether trees can realistically survive the proposed work.

The condition on your permit will say something like: "Prior to permit issuance, the applicant shall conduct exploratory root investigation within [specified area] and submit findings to Urban Forestry."

What that means for your project: Construction cannot proceed until the investigation is complete and a report demonstrating acceptable impacts has been submitted and accepted.

How I handle it: I excavate with the AirSpade within the investigation areas specified by the municipality. Every root is measured, photographed with scale references, and mapped to precise locations. The investigation report addresses Urban Forestry's specific concerns and demonstrates compliance with preservation requirements. Most reports are ready for submission within three business days of field work.

When foundations, excavations, or utilities overlap a tree protection zone, municipalities typically require that roots be pruned cleanly before mechanical excavation begins. This protects the remaining root system from the tearing and crushing that mechanical equipment causes, and it's the difference between a tree that survives construction and one that doesn't.

The condition will say something like: "All roots within proposed excavation areas shall be pruned cleanly by a qualified arborist using pneumatic excavation prior to mechanical excavation."

What that means: Your excavator can't move until this is done.

How I handle it: The AirSpade exposes roots intact within the approved excavation area. Roots are then pruned cleanly at the excavation boundary using sharp tools. Mechanical work can proceed after without contacting the remaining root system, giving the tree the best chance of recovering from what's been removed.

Construction encroachment on tree protection zones causes soil compaction from equipment traffic, material storage, or unauthorized excavation. When violations occur, municipalities issue stop-work orders and require documented evidence of impacts and a submitted remediation plan before work can resume.

The order will say something like: "Construction has encroached on tree protection zones. All work shall cease. Applicant shall document impacts and submit a remediation plan within [timeframe]."

What that means: Your project is stopped until compaction extent is documented and remediation is approved by the city.

How I handle it: AirSpade investigation reveals the depth and lateral extent of compaction within the affected area. Remediation uses radial trenching and vertical mulching to fracture compacted soil, restore air and water infiltration, and stimulate new root growth. Documentation includes photographic evidence, compaction measurements, and monitoring protocols for Urban Forestry review.

When a tree shows unexplained decline, the cause is often underground. Girdling roots, grade changes, soil compaction, or decay at the root flare are common culprits that are invisible from above. Root collar excavation exposes what's actually happening at the base of the tree without damaging the root system in the process. You get a real diagnosis instead of a guess.

Compacted soil is one of the most common and most overlooked causes of tree decline on urban sites. When soil is compacted, roots can't access the air and water they need, and no amount of surface treatment fixes the problem. Vertical mulching and radial trenching fracture the compacted layer, restore infiltration, and give the root zone a genuine recovery path. Particularly effective for established trees on sites with a history of construction activity or heavy use.