General liability is the backbone of a roofing contractor's insurance program, and it is one of the most misunderstood policies in the trade. Roofers often assume "GL covers everything that goes wrong on the job." It does not. GL is built to cover sudden, accidental harm to other people and their property — not the quality or performance of your own roofing work. Below are the exclusions California roofers run into most, explained in plain English.
This is the big one. Standard ISO general liability forms contain what are informally called the "business risk" exclusions (endorsement language often labeled j5, j6, and l). In short: if you install a roof wrong and it fails, the cost to tear out and replace your own defective work is not covered. GL is liability insurance, not a warranty or a performance bond.
Here is the practical line: if a poorly nailed roof blows off and a shingle injures a passerby or damages the neighbor's car, that resulting third-party damage may be covered. But the labor and materials to redo the roof itself — the workmanship — is your business risk, not the insurer's. This trips up more roofers than any other exclusion.
Roofing exists to keep water out, so leak claims are the industry's most frequent dispute. Many roofing GL policies either exclude or sub-limit interior water damage caused by a leak that traces back to your work. Even where "resultant damage" to the building interior might be argued as covered, insurers frequently apply the faulty-workmanship exclusion to deny the portion tied to your defective installation. Continuous or repeated water intrusion over time (progressive damage) is also commonly excluded because it isn't a sudden accident.
This is a roofing-specific exclusion that surprises low-slope contractors. Many carriers add a "torch-applied" or "open-flame / hot-work" exclusion, or exclude hot-mopping and kettle operations entirely, because of the fire risk. If you do torch-down modified bitumen, built-up roofing, or use an open flame, you must confirm it is affirmatively covered — often it requires a specific endorsement, a higher premium, or a separate warranty about hot-work procedures. Assuming coverage here can leave a six-figure fire loss completely uninsured.
Some roofing policies restrict coverage by height or number of stories — for example, excluding work above two or three stories, or above a set number of feet. A contractor who bids a four-story commercial job under a policy capped at two stories may have no coverage for that project at all. Steep-slope work can also carry different terms than low-slope, so the exposure your policy assumes must match the work you actually perform.
California construction-defect litigation makes insurers cautious about certain residential exposures. It is common to see exclusions for new tract housing, condominiums, condo conversions, or apartment projects. A roofer who does mostly re-roofs but takes one new-construction condo job may find that job is carved out of coverage.
If you hire subs, your policy likely contains a subcontractor warranty: it requires that any sub you use carries their own GL and workers' compensation and names you as additional insured. Fail to collect those certificates and the carrier can charge you the higher "uninsured sub" rate at audit — or dispute coverage for a claim arising from that sub's work.
| Exclusion | What it means for you |
|---|---|
| Employee injuries | Injuries to your own workers are handled by workers' compensation, not GL. GL affirmatively excludes them. |
| Pollution / fumes / silica | Asbestos abatement, coal-tar fumes, silica dust, and similar exposures are typically excluded and need separate coverage. |
| Mold and fungus | Commonly excluded, even when the mold results from a leak tied to your work. |
| Professional liability | If you design, spec, or engineer a roof system and the design fails, that's professional exposure — GL doesn't respond. |
| EIFS | Exterior insulation and finish systems are frequently excluded outright. |
| Punitive damages / contractual liability | Punitive damages are often uninsurable, and liability you assume by contract beyond an "insured contract" may not be covered. |
Exclusions aren't a reason to panic — they're a reason to build the right program. Practical steps for California roofers:
For the official view of what contractors must carry in California, see the CSLB insurance requirements and the California Department of Industrial Relations (DIR).
Thrive Risk Management reviews the fine print and builds coverage around how you really work — steep-slope, low-slope, torch-down and all. Driven by integrity, in plain English.
Get a free quoteThis article is general information, not a coverage opinion or legal advice. Policy terms, exclusions, and endorsements vary by carrier and by contractor. Always review your specific policy and consult a licensed agent.