Insurance for Mold Remediation Contractors

What underwriters look at

Mold remediation sits in an unusual spot in the insurance world because standard general liability policies typically carry a fungi and pollution exclusion. That means a crew accused of spreading spores through an HVAC system, or failing to fully remediate a hidden pocket, may find their base GL policy simply doesn't respond. A contractors pollution liability policy, either as an endorsement or a standalone form, is usually the difference between real protection and a certificate of insurance that doesn't cover the work being performed.

Containment failure is the operational risk that drives most claims in this trade. Negative air pressure setups, poly sheeting barriers, and HEPA filtration are standard practice, but a barrier that's improperly sealed or a machine that fails mid-job can let spores migrate into occupied areas, turning a contained job into a claim involving contents damage, air quality remediation, and sometimes temporary relocation costs for the homeowner.

Clearance testing creates a second layer of dispute risk. Remediation companies are often paid based on passing a third-party clearance test, and disagreements arise when a retest weeks later comes back with elevated spore counts — sometimes due to new moisture intrusion unrelated to the original job, but the remediation contractor is frequently the first party blamed. Documenting pre- and post-work moisture readings and containment setup is as much a liability tool as it is quality control.