Why Decay Detection Matters
Many trees conceal internal decay long before visible signs appear. Cavities, root rot, or internal fungal infections can compromise structural integrity without external symptoms. Identifying decay early prevents property damage, protects public safety, and saves valuable trees that can often be preserved through targeted care instead of removal.
Our Tree Decay Detection Techniques
Evergreen uses specialized diagnostic tools to detect decay, cavities, and internal weaknesses that can’t be seen from the outside. By combining modern technology with arborist expertise, we deliver accurate, non-destructive assessments that inform maintenance, pruning, and risk management plans.
Sonic Tomography – Non-Invasive Tree Imaging
Sonic tomography uses sound waves to create a color-coded cross-sectional image of the tree’s interior. This non-invasive method detects hollow areas, fungal decay, or structural loss while leaving the tree completely intact. It’s ideal for heritage trees or trees in high-traffic areas where preservation and safety are both priorities.
Resistograph Testing – Traditional Density Measurement
Resistograph testing measures internal wood density using a microdrill that records resistance as it passes through the trunk. The fine needle leaves an almost invisible entry point but provides detailed data on decay depth and extent, confirming or refining tomography results.
Combining Data for Accurate Results
Evergreen’s arborists often combine sonic tomography and resistograph data for complete diagnostic accuracy. This dual-method approach prevents unnecessary removals and ensures that pruning, bracing, or monitoring decisions are based on measurable evidence—not assumption.
When to Schedule Decay Detection
Schedule decay detection when a tree shows signs of canopy thinning, fungal growth, trunk cavities, or past storm damage. It’s also recommended for high-value or heritage trees, those near structures or public walkways, and during pre-construction assessments. Regular decay inspections reduce liability and support long-term preservation planning.
Why Choose Evergreen for Tree Decay Detection
Since 1980, Evergreen Tree Care has combined advanced diagnostic technology with decades of field experience. Our ISA Certified and TRAQ Qualified Arborists provide objective, data-backed results you can trust. From public works departments to HOA landscapes, we deliver accurate insights that guide safe, sustainable tree management.
Tree Decay Detection Available Across the East Bay
Evergreen Tree Care provides professional decay detection services for residential, commercial, and municipal clients across Contra Costa County and the surrounding East Bay. Our arborists use precision equipment and proven methods to assess trees safely and efficiently.
East Bay Clients Trust Evergreen for Advanced Diagnostics
Property owners and agencies across Contra Costa County rely on Evergreen Tree Care for accurate, science-based diagnostics that protect both trees and people.
- Explore More Diagnostic & Consulting Services
Decay detection is part of Evergreen’s complete suite of advanced tree diagnostics and consulting services. Explore additional solutions that provide insight, accuracy, and confidence in your tree management decisions.
Tree Risk Assessment
Evaluate safety and structural integrity with detailed risk assessments performed by TRAQ Certified Arborists.
Tree Inventory
Comprehensive GIS-based inventories document tree locations, species, and condition for organized, proactive management.
Arborist Reports
Get clear, compliant documentation for development, insurance, or municipal permitting.
Permitting & Compliance
Ensure your projects meet local tree protection and removal ordinances with Evergreen’s expert guidance and reporting.
Request a Tree Decay Detection Consultation
Protect your property and preserve your trees with expert decay detection. Call Evergreen Tree Care at 925-825-8165 or request a consultation online to schedule an appointment with one of our Certified Arborists.
Schedule Your Tree Service Today
Get expert care from trusted East Bay arborists—call 925-825-8165 or request an appointment using the form below, and we’ll take care of the rest.
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What Happens Next
- Consultation – A Certified Arborist reviews your property and evaluates trees for visible or suspected decay.
- Testing – We perform sonic tomography and, if necessary, resistograph testing for confirmation.
- Analysis & Reporting – You receive a clear report with visual data, results, and recommendations.
- Follow-Up – We discuss next steps such as preservation, pruning, or monitoring based on findings.