GL & Umbrella Tower Playbook • ISO CG 20 01 & CG 24 042026 Clause Template • 100% AnonymousClause Danger Score: 90/100Typical Exposure: $50,000 – $300,000+ in Horizontal Exhaustion & subrogation lawsuits

ISO CG 20 01 Primary & Non-Contributory + CG 24 04 Subrogation

Even when a contractor or vendor has a $1M GL policy and a $5M Umbrella policy, a missing ISO CG 20 01 (Primary and Non-Contributory) endorsement or an Umbrella "Other Insurance" clause can trigger "Horizontal Exhaustion"—allowing the subcontractor’s Umbrella carrier to refuse to pay until the upstream Owner’s and GC’s own primary policies are exhausted first. Similarly, an ISO CG 24 04 Waiver of Subrogation that requires a scheduled list instead of blanket wording leaves you open to carrier subrogation suits.

Real-World Financial Loss Case Study & PreventionDocumented Loss: $320,000 denied Completed Operations & subcontractor defect claim

General Contractor Left With $320,000 Uninsured Water Defect Claim Due to Missing CG 20 37 & CG 22 94 Exclusion

What Went Wrong (Unredlined Draft)

A GC collected a subcontractor COI showing "Additional Insured: Yes," but the actual binder only attached ISO CG 20 10 (Ongoing Operations)—omitting ISO CG 20 37 (Completed Operations)—and the GC’s own GL policy contained ISO CG 22 94 deleting the Subcontractor Exception.

How EndorseIQ™ Prevents It Automatically

EndorseIQ™ mandates both ISO CG 20 10/20 38 and CG 20 37 (Completed Operations), strikes ISO CG 22 94 and CG 21 39, and enforces Primary & Non-Contributory (CG 20 01) vertical exhaustion.

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Free 2026 Copy-Paste Clause Template (First 60% Unlocked • Cross-Section Carve-Out Gated)

“OTHER INSURANCE — EXCESS / UMBRELLA CONDITION: This insurance is excess over any other primary, excess, umbrella, or contingent insurance available to any Additional Insured, unless such other insurance is specifically written to apply strictly in excess of this policy.”

“PRIMARY & NON-CONTRIBUTORY VERTICAL EXHAUSTION (ISO CG 20 01 & FOLLOW-FORM UMBRELLA) + BLANKET WAIVER OF SUBROGATION (ISO CG 24 04): Both Primary CGL and Excess/Umbrella policies are endorsed to apply on a strictly Primary and Non-Contributory basis (vertical exhaustion) ahead of any insurance carried by

Counterparties override this cap in 3 other sections. Scan your full PDF free (60s) to unlock cross-section protection.

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What to Say to the GL Carrier & Upstream GC / Owner Requirements

"Our upstream contract mandates Vertical Exhaustion across both the Primary GL and the $5M Umbrella. We need ISO CG 20 01 attached to the GL, a Primary & Non-Contributory Follow-Form endorsement on the Umbrella, and Blanket ISO CG 24 04 Waiver of Subrogation on GL, Auto, and Workers Comp."

Why they drafted it this way: Umbrella underwriters draft strict "Other Insurance" clauses so that on a $2.5M claim, they can force the upstream GC’s primary carrier to pay the second $1M instead of dropping down vertically above the subcontractor’s $1M primary GL.

Mandatory Audit Checklist Points

Attach ISO CG 20 01 (Primary and Non-Contributory — Other Insurance Condition) on the GL policy
Enforce Vertical Exhaustion on the Umbrella/Excess policy so it responds before upstream policies
Attach Blanket Waiver of Subrogation on GL (CG 24 04), Business Auto (CA 04 44), and Workers Comp (WC 00 03 13)
Verify Per-Project Aggregate Limit endorsement (ISO CG 25 03) so claims on other jobs don’t erode your limit

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EndorseIQ™ Policy & Binder Scanner

ACTIVE ENGINE: ENDORSEIQ™ (MULTI-HOP ISO & COVERAGE GRAPH)

1. Select Policy / COI Playbook & Protected RoleAuto-Tailored to Your Protected RoleConstruction GL & Subcontractor • Protecting: General Contractors, Subs & Builders

2. Input Your Document (PDF, Word .docx, Scanned Image, or Text)

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Drop PDF / .DOCX anywhere, or press Cmd+V / Ctrl+V to paste policy, COI, or endorsement text

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COMMERCIAL GENERAL LIABILITY (CGL) CONSTRUCTION BINDER & ENDORSEMENT SCHEDULE

THIS COMMERCIAL GENERAL LIABILITY BINDER ("Policy") is issued by VANGUARD SPECIALTY E&S INSURANCE CO. ("Carrier") to APEX BUILDERS & MECHANICAL CONTRACTORS INC. ("Named Insured") with limits of $1,000,000 Each Occurrence / $2,000,000 General Aggregate / $2,000,000 Products-Completed Operations Aggregate.

SECTION 1. ENDORSEMENT CG 21 39 — CONTRACTUAL LIABILITY LIMITATION (DELETION OF INSURED CONTRACT).
This Policy is modified by ISO Endorsement CG 21 39. The definition of "Insured Contract" in Section V (Definitions) of Commercial General Liability Coverage Form CG 00 01 is amended by deleting Paragraph f. in its entirety. Consequently, this Policy provides ZERO coverage for any tort liability assumed by Named Insured in any construction subcontract, Master Services Agreement (MSA), AIA contract, or hold-harmless indemnity agreement with an Owner or General Contractor.

SECTION 2. ENDORSEMENT CG 22 94 — EXCLUSION: DAMAGE TO WORK PERFORMED BY SUBCONTRACTORS ON YOUR BEHALF.
This Policy is modified by ISO Endorsement CG 22 94. Exclusion l. (Damage to Your Work) of Section I — Coverage A (Bodily Injury and Property Damage Liability) is replaced to delete the subcontractor exception. This insurance does not apply to "Property Damage" to "your work" arising out of it or any part of it and included in the "products-completed operations hazard," even if the damaged work or the work out of which the damage arises was performed on your behalf by a subcontractor.

SECTION 3. ADDITIONAL INSURED SCHEDULE — ONGOING OPERATIONS ONLY (OMISSION OF CG 20 37 COMPLETED OPERATIONS).
Blanket Additional Insured coverage for upstream General Contractors and Project Owners is provided exclusively under Endorsement CG 20 10 (Ongoing Operations). Coverage for Additional Insureds terminates the moment Named Insured's active operations at the jobsite cease. Endorsement CG 20 37 (Additional Insured — Owners, Lessees or Contractors — Completed Operations) is NOT attached, leaving Named Insured in breach of all post-completion subcontract insurance requirements.

SECTION 4. MANUSCRIPT ACTION-OVER / EMPLOYEE BODILY INJURY & LABOR LAW EXCLUSION (ENDT. GL-904).
Notwithstanding anything to the contrary in the "Employer's Liability" exclusion, this Policy does not apply to any claim, suit, contractual indemnity demand, or third-party "Action-Over" impleader brought by an Owner, General Contractor, or third party seeking contribution or indemnification for "Bodily Injury" to any employee, leased worker, temporary worker, or employee of any subcontractor of Named Insured (including any claim arising under New York Labor Law §§ 200, 240, or 241).

SECTION 5. MANUSCRIPT RESIDENTIAL, MULTI-FAMILY, MIXED-USE CONVERSION & SUBSIDENCE EXCLUSION (ENDT. GL-918).
This insurance does not apply to any "bodily injury," "property damage," or defense expense arising out of construction, remodeling, repair, or subcontracting work on any tract housing, condominium, townhouse, apartment building, dormitory, or mixed-use building containing residential units, or any structure converted to residential use at any time. Furthermore, all claims arising out of earth movement, soil settlement, underpinning, shoring, or subsidence are excluded in their entirety.

Optional — Deal Context or Special Concerns (e.g., "5-year retail lease in Texas" or "$40k fixed-fee dev build")

100% Stateless & Private • Replaces a $1,200 – $3,500 Risk Audit attorney review

Frequently Asked Questions

What is Vertical Exhaustion vs. Horizontal Exhaustion in construction insurance?

On a $2M claim where the Subcontractor has $1M Primary GL + $5M Umbrella, Vertical Exhaustion means the Subcontractor’s $1M Primary pays first and the Subcontractor’s $5M Umbrella pays the next $1M. Without a Primary & Non-Contributory Umbrella endorsement, Horizontal Exhaustion lets the Sub’s Umbrella carrier force the GC’s own $1M Primary policy to pay before the Sub’s Umbrella contributes a dime.

How do I redline ISO CG 20 01 Primary and Non-Contributory CG 24 04 Waiver of Subrogation traps in my Construction GL & Subcontractor anonymously without creating an account?

Upload your Construction GL & Subcontractor PDF or Word (.docx) draft to ExclusionRadar.com to run the "ISO CG 20 01 Primary & Non-Contributory + CG 24 04 Subrogation" defense cartridge 100% anonymously—with zero account registration, zero email login, and stateless in-memory processing. EndorseIQ™ flags ISO CG 20 01 Primary and Non-Contributory CG 24 04 Waiver of Subrogation exposure (typically $50,000 – $300,000+ in Horizontal Exhaustion & subrogation lawsuits; documented unredlined loss: $320,000 denied Completed Operations & subcontractor defect claim), checks for cross-section overrides, and exports a ready-to-send Microsoft Word (.docx) Track-Changes file.

More Construction GL & Subcontractor Redline Playbooks

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Danger Score: 97/100

Construction Subcontractor Agreement Redline Auditor (Pay-if-Paid & Retainage)

General Contractor (GC) subcontracts are notoriously one-sided. A "Pay-if-Paid" clause means if the property owner gets into a dispute with the GC over something completely unrelated to your trade, the GC never has to pay you for your completed work and materials.

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Danger Score: 86/100

NDA & Confidentiality Agreement Redline Auditor (Residuals & Hidden Non-Solicits)

Enterprise counterparties regularly sneak a "Residuals Clause" into standard NDAs stating that anything their employees "retain in their unaided memory" after reading your pitch deck or source code can be freely used to build a competing product.

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Danger Score: 90/100

1099 Independent Contractor Agreement Redline Auditor

Many companies hand 1099 independent contractors a repurposed W-2 employee agreement that demands full-time exclusivity, claims ownership of everything you build on nights and weekends, and forces you to indemnify the company against their own business mistakes.

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Danger Score: 94/100

Software Development & Custom App SOW Redline Auditor (Scope Creep & Acceptance)

When dev shops sign a client’s custom software SOW, "Deliverable Acceptance" is often defined as "Client’s sole satisfaction," paired with a 12-month free warranty for "any defects." Clients use subjective UI feedback and changing feature requests disguised as "bugs" to withhold the final 30% milestone payment indefinitely.

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