9 min read · Last updated September 4, 2026
- The ISO (Insurance Services Office) CG 00 01 exclusion (l), “Damage to Your Work,” blocks Commercial General Liability (CGL) coverage for property damage to a contractor’s own completed work, once that work falls inside the products-completed operations hazard. ISO is the industry organization that drafts and files the standardized policy language most US insurers license and use.
- The exclusion’s own subcontractor exception restores coverage whenever the damaged work, or the work that caused the damage, was performed on the insured’s behalf by a subcontractor, not the named insured’s own crew.
- On Douglas Kwan’s $146,000 water-intrusion claim, the $91,400 traced to his subcontractor’s flashing was covered; the $54,600 traced to his own crew’s siding work was denied, on the same claim.
- General liability renewal rates rose 5.44% in Q2 2026 per the Ivans Index, which makes a coverage gap that reads as a flat denial more expensive to discover than it was a year ago.
In this article
- What the Damage to Your Work Exclusion Blocks
- The Subcontractor Exception in Exclusion L
- How One Water Damage Claim Split in Two
- Why General Liability Rates Make This Gap More Costly
- What General Contractors Should Check Before the Next Claim
- Frequently asked questions
Douglas Kwan’s crew finished a $410,000 two-story addition in Portland, Oregon, in March 2026. Kwan Premier Builders, the general contracting company Kwan has run for eleven years, framed the addition, hung the siding, and finished the interior. He subcontracted the exterior weatherproofing and window flashing to a specialty waterproofing crew he had used on a dozen prior jobs. Five months later, in August 2026, the homeowner found water stains spreading behind the drywall in two separate corners of the new construction, and an engineer’s report put the total repair cost at $146,000.
What the Damage to Your Work Exclusion Blocks
Douglas Kwan’s Commercial General Liability (CGL) policy is built on the ISO CG 00 01 form, the standard coverage form most general contractors carry. The Insurance Services Office (ISO) is the industry organization that drafts and files the standardized policy language most US insurers license and use. Exclusion (l) of that form, titled “Damage to Your Work,” removes coverage for property damage to work the named insured completed, once that work falls inside what the form calls the products-completed operations hazard. That phrase covers property damage that shows up after a job is finished and the contractor has left the site, which is exactly Douglas Kwan’s situation. His crew was gone. The addition had passed final inspection. The homeowner had been living in it for five months when the water stains appeared.
Read on its own, exclusion (l) would deny the entire $146,000 claim. General liability insurance is built to pay for damage a contractor’s work causes to someone else’s property, or injuries to third parties, not to replace a contractor’s own defective work. Insurers treat that kind of loss as a business risk the contractor should absorb through workmanship warranties, not an insurable accident. DIN has covered the basic mechanics of this exclusion before, including how faulty workmanship voids general liability coverage; this article goes one step further, into the single clause inside exclusion (l) that can flip the outcome entirely.
The Subcontractor Exception in Exclusion L
Exclusion (l) does not stop at denying coverage. It carries its own carve-back, one sentence long, and that sentence is what decided whether Douglas Kwan’s claim got paid or denied. The ISO CG 00 01 12 07 specimen coverage form states the exclusion this way: “Property damage to your work arising out of it or any part of it and included in the products-completed operations hazard,” followed immediately by, “This exclusion does not apply if the damaged work or the work out of which the damage arises was performed on your behalf by a subcontractor.”
That single sentence is the subcontractor exception, and insurance trade publications treat it as one of the most consequential clauses in the standard CGL form for anyone who builds with subcontracted labor. CLM Magazine, published by the Claims and Litigation Management (CLM) Alliance, a trade publication for insurance claims professionals, describes exclusion (l) as the clause that eliminates coverage “when property damage to the named insured’s own work is caused by work performed by the insured contractor after the work has been completed,” while the subcontractor exception restores coverage the moment a subcontractor, rather than the named insured’s own crew, performed the work that failed. The exception does not create new coverage out of nothing. It restores coverage that exclusion (l) would otherwise remove, and only for the share of the loss traceable to subcontracted work.
How One Water Damage Claim Split in Two
Douglas Kwan’s insurer treated his single $146,000 claim as two separate questions, because the engineer’s report traced the water intrusion to two unrelated defects. Around a rear window, the waterproofing subcontractor had installed the head flashing without the required overlap, leaving a gap that let water track behind the sheathing. On the opposite corner, Kwan’s own framing crew had cut a weep gap in the siding too narrow to drain, trapping moisture against the wall for months. The engineer apportioned $91,400 of the repair cost to the flashing gap and $54,600 to the weep gap.
Exclusion (l) applied to both defects on paper, but the subcontractor exception only answered one of them. The waterproofing sub performed the flashing work on Kwan’s behalf, so the exclusion did not apply to that portion, and the insurer paid the $91,400 minus the policy deductible. The weep gap was different. Kwan’s own crew cut it, so exclusion (l) applied in full, with no exception to restore it, and the insurer denied the $54,600 outright, in the same letter, on the same claim number.
| Factor | Kwan’s Own Crew Did the Work | The Subcontractor Did the Work |
|---|---|---|
| Applicable CG 00 01 provision | Exclusion (l), full force, no exception | Exclusion (l), subcontractor exception applies |
| Coverage outcome | Denied | Covered, minus deductible |
| Defect on Kwan Premier Builders’ claim | Undersized weep gap cut into the siding by Kwan’s framing crew | Missing head-flashing overlap around a window, installed by the waterproofing subcontractor |
| Repair cost apportioned | $54,600 | $91,400 |
| Insurer’s payment | $0 | $91,400, minus deductible |
| Underlying rule | Products-completed operations hazard excludes damage to the named insured’s own finished work | Exclusion does not apply when the damaged work, or the work causing the damage, was performed on the insured’s behalf by a subcontractor |
Why General Liability Rates Make This Gap More Costly
This split-outcome mechanic is not new, but it is landing at a worse moment for contractors’ budgets. General liability renewal rates rose 5.44% in the second quarter of 2026, per the Ivans Index, reported by Captive.com. The Ivans Index tracks renewal rate changes on agency-placed policies, the size of book most general contracting firms actually buy, not the large corporate placements that dominate some other market indices. A contractor paying more for the same limit has less room to absorb a coverage gap that reads as a flat denial on half of his own claim. Knowing exactly which portion of a completed-operations loss the policy was built to pay for, before a claim happens, is worth more in a market where the premium itself keeps climbing.
What General Contractors Should Check Before the Next Claim
Three checks matter more than reading exclusion (l) for the first time after a claim has already split against you.
First, confirm the subcontractor exception is actually still on the policy. Some carriers attach an endorsement, ISO form CG 22 94, “Exclusion, Damage to Work Performed by Subcontractors on Your Behalf,” that removes the subcontractor exception entirely and treats subcontracted work exactly like the general contractor’s own. A policy carrying that endorsement would have given Douglas Kwan no better outcome on the flashing gap than the weep gap.
Second, keep every subcontractor’s own insurance current, not just on file at signing. If a sub’s coverage lapses before a claim, the general contractor’s own policy can end up absorbing costs the sub’s carrier should have paid. DIN has covered what happens when a subcontractor’s certificate of insurance lapses in more detail.
Third, confirm the products-completed operations hazard is active on the policy at all. Some CGL forms exclude completed operations coverage entirely in exchange for a lower premium, in which case the subcontractor exception has nothing left to restore. DIN’s guide to completed operations coverage for contractors walks through how that coverage is priced and endorsed separately from the base CGL form.
None of these three checks would have changed Douglas Kwan’s outcome on the weep gap. His own crew cut it, and no version of the subcontractor exception reaches work performed by the named insured’s own employees. But knowing the split existed before the engineer’s report arrived would have told him which half of the $146,000 to expect, and which half to plan for out of pocket.
Frequently asked questions
Does general liability insurance cover a contractor’s own faulty work?
Not usually. The standard ISO CG 00 01 policy’s “Damage to Your Work” exclusion, exclusion (l), blocks coverage for property damage to work the named insured completed, once that work falls inside the products-completed operations hazard. General liability is built to cover damage to other people or their property, not to replace your own defective work.
What is the subcontractor exception to the your work exclusion?
It is one sentence inside exclusion (l) itself: the exclusion does not apply if the damaged work, or the work that caused the damage, was performed on the insured’s behalf by a subcontractor. That clause restores coverage for subcontractor-caused completed-operations claims that would otherwise be excluded.
Can one insurance claim be partly covered and partly denied under this exclusion?
Yes. If an engineer’s report or an adjuster’s investigation traces separate defects to separate crews, an insurer can apply exclusion (l) to the general contractor’s own-crew portion and the subcontractor exception to the subcontracted portion of the same claim, producing two different outcomes from one loss event.
Does hiring subcontractors always guarantee coverage for their mistakes?
No. The exception only restores coverage that exclusion (l) would otherwise remove; it does not create new coverage. A policy without completed operations coverage at all, or an endorsement that removes the subcontractor exception, can still leave the general contractor exposed even when a subcontractor caused the damage.
How can a general contractor confirm this exception applies to their own policy?
Ask for the CG 00 01 declarations page and read exclusion (l) directly. Some carriers attach a subcontractor exclusion endorsement, ISO form CG 22 94, that removes the exception entirely. If that endorsement is attached, subcontracted work carries no more protection than work performed in-house.
A $146,000 Claim Split in Two Is a Cheap Lesson Compared to a Denied Total Loss
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