Independent forensic investigation of structural wood deterioration — decay, insect damage, and capacity assessment in wood-framed structures.
Wood deterioration forensic investigation identifies the type and extent of decay, insect damage, and structural degradation in wood framing, evaluates remaining capacity, and recommends remediation. PE-stamped reports support insurance claims, construction defect cases, and repair planning.
Fungal Decay
Wood-decay fungi grow when moisture content exceeds ~20%, breaking down cellulose and lignin — causing soft, friable wood with significant strength loss.
Subterranean Termites
Termite colonies consume cellulose, creating galleries inside wood members that destroy structural capacity from within — often hidden until severe.
Moisture Intrusion
Chronic water exposure from leaks, condensation, or poor drainage elevates wood moisture, initiating decay and attracting insects.
Dry Rot (Brown Rot)
A specific fungus that can transport moisture through mycelium, allowing decay to spread beyond the wet zone — particularly destructive in concealed spaces.
UV Degradation
Ultraviolet exposure breaks down surface lignin, causing checking, graying, and surface erosion of exposed wood members.
Chemical Degradation
Exposure to acids, alkalis, or industrial chemicals can degrade wood fibers, reducing strength in contaminated environments.
Visual survey of all accessible wood framing, documenting staining, softening, distortion, and visible fungal growth or insect activity.
Probing and sounding — using screwdrivers or mallets to identify soft spots and assess internal deterioration.
Moisture content measurement using pin or pinless moisture meters at multiple locations.
Section loss assessment — measuring remaining sound wood dimensions in deteriorated members.
Species identification and grading — verifying wood species and structural grade for capacity calculations.
Structural analysis — evaluating remaining capacity of deteriorated members against design loads.
Laboratory analysis — culturing fungal samples or identifying insect species when needed for causation.
PE-stamped report with deterioration extent, significance, causation, and remediation.
Soft & Friable Wood
Probing reveals soft spots where decay has destroyed wood fibers — the location and extent of softening indicates deterioration severity.
Termite Galleries & Mud Tubes
Internal galleries, mud tubes on foundation walls, and shed wings indicate active or past termite infestation.
Fungal Growth
Visible mycelium, fruiting bodies, or musty odors indicate active fungal decay requiring investigation.
Moisture Readings
Elevated moisture content (above 20%) indicates conditions conducive to decay — identifying moisture sources is critical.
Checking & Splitting
Cracks along the grain (checking) and across the grain (splitting) indicate moisture cycling and potential structural distress.
✗ Treated wood doesn't deteriorate.
✓ Pressure-treated wood resists decay and insects but is not immune — treated wood can still deteriorate from chronic moisture, chemical exposure, or physical damage to the treatment zone.
✗ Dry rot means the wood is dry.
✓ Dry rot is caused by a fungus that can transport moisture through its mycelium, allowing it to spread into seemingly dry areas. The name is misleading — moisture is always the root cause.
✗ Termite damage is always visible.
✓ Subterranean termites often consume wood from the inside, leaving a thin intact surface. By the time damage is visible, structural capacity may be severely compromised. Probing and sounding are essential.
PE-stamped forensic report with deterioration extent and significance
Moisture content survey results
Remaining structural capacity assessment
Deterioration type identification (fungal, insect, moisture)
Remediation recommendations — sistering, replacement, or reinforcement
Moisture source identification and correction recommendations
Wood deterioration in commercial structures affects safety, occupancy, and asset value. For property owners and facility managers, an independent investigation quantifies deterioration extent, identifies moisture sources, and provides remediation scope — preventing catastrophic failure and supporting insurance or construction defect claims.
Wood deterioration cases involve claims against builders (inadequate moisture protection, improper flashing), pest control companies (inspection failures), and owners (maintenance neglect). Key considerations: determining whether deterioration resulted from construction defect, maintenance failure, or natural aging. Dr. Mousavi's reports provide causation opinions for litigation.
Wood deterioration from gradual decay and insect damage is typically excluded as wear and deterioration. However, if deterioration results from a covered sudden water event (pipe burst, storm), partial coverage may apply. Our PE-stamped reports differentiate covered causation from excluded gradual deterioration.
Independent engineering answers about wood deterioration
Through probing and sounding, moisture meter readings, and in some cases exploratory demolition or borescope inspection. The combination of techniques identifies deterioration that is not visible on the surface.
Depending on extent, sistering new members alongside deteriorated ones, scabbing reinforcement, or epoxy consolidation may restore capacity. Severe deterioration requires member replacement. An independent engineer determines the appropriate approach.
Dry rot itself is typically excluded as gradual deterioration. However, if the moisture source is a covered event (plumbing leak, storm damage), resulting damage may have coverage. Engineering investigation of causation is essential.
Discuss your commercial, industrial, insurance, or litigation-related engineering matter with an independent forensic engineer. All consultations are confidential.