The damage repair sequence after a Chattanooga rodent infestation
Rodent damage repair is the fourth and final phase of a complete rodent remediation — after population control, exclusion sealing, and decontamination. Attempting repairs before the population is controlled traps live animals in sealed spaces. Installing new insulation before decontamination creates a contaminated substrate under new material. Repairing ductwork before the entry points are sealed means the next seasonal rodent population damages the new duct sections as readily as the old ones.
The correct sequence is sequential and non-compressible: control → seal → decontaminate → repair. We coordinate all phases and can manage the full sequence, including contractor referrals for electrician assessment of gnawed wiring, HVAC contractor coordination for major duct replacement, and structural assessment referrals for load-bearing member damage that exceeds our scope.
Damage repair by category
- Attic insulation: Contaminated insulation removed via negative-pressure equipment, structural surfaces decontaminated, wiring inspected (electrician referral if needed), then new blown-in insulation installed to current IECC R-49 code value for Chattanooga Climate Zone 4.
- Flex ductwork: Damaged sections inspected for patch-vs-replace determination. Minor punctures patched with HVAC mastic and tape. Major tears and multi-puncture sections replaced with new flex duct of matching diameter. Duct insulation jacket inspected for nesting and replaced where rodents nested inside.
- Vapor barrier (crawl space): Damaged sheeting removed, floor joists decontaminated, new 6-mil minimum polyethylene sheeting installed with proper overlaps, wall attachment, and penetration seals.
- Pipe foam insulation: Foam insulation on hot water, refrigerant, and supply pipes in attics and crawl spaces that was gnawed or stripped by rodents replaced with new foam tubing. Prevents condensation and energy loss in Chattanooga's humid climate.
- Structural wood (minor gnaw damage): Surface gnaw damage on rafters, joists, and sheathing that doesn't affect structural capacity — patched with wood filler and sealed. Significant load-bearing member damage referred to a structural engineer before any repair.
Pricing
| Scope | Typical range | Notes |
|---|---|---|
| Damage inspection + repair scope | Free | Line-item written estimate. Damage repair never estimated without inspection. |
| Flex duct patch (1–3 sections) | $150–$400 | HVAC mastic + tape repair. Section replacement if needed quoted separately. |
| Attic insulation replacement (1,500 sq ft) | $1,200–$2,500 | Blown-in to R-49. Decontamination separate line item. |
| Vapor barrier replacement (800–1,500 sq ft) | $800–$1,800 | Old barrier removal + joist decon + 6-mil new install. |
| Structural wood patching (minor) | $200–$500 | Surface gnaw damage. Load-bearing damage referred to structural engineer. |
Frequently asked questions
What types of damage do rodents cause in Chattanooga homes?
The four most common: attic insulation damage (urine saturation, compression, fecal loading); electrical wiring gnaw damage in attics and wall cavities (fire risk requiring electrician assessment); flex ductwork punctures and tears in attics and crawl spaces; and vapor barrier damage in crawl spaces from Norway rat burrowing and nesting.
Do you repair gnawed electrical wiring?
We identify and document gnawed wiring during inspections, but electrical repair is licensed electrician work. We coordinate with electricians for our clients and will not re-insulate an attic over uninspected gnawed wiring. Wiring assessment is a gate between decontamination and repair completion in every project.
Can flex ductwork be patched or does it need replacement?
Minor punctures under 2 inches can be patched with HVAC mastic tape and mastic compound — durable and restores performance. Larger tears, multi-puncture sections, or duct with rodent nesting inside the insulation jacket require section replacement. We assess each section individually.
What does rodent damage repair cost in Chattanooga?
Highly variable by damage type and extent. Rough ranges: insulation replacement (1,500 sq ft): $1,200–$2,500; flex duct patch (1–3 sections): $150–$400; vapor barrier replacement (800–1,500 sq ft): $800–$1,800. Line-item written estimate always provided after the free damage inspection.