Subcontractor Default Insurance for Commercial Roofing Contractors

Subcontractor Default Insurance (SDI) Policy Form

SDI is a specialized insurance product that covers a general or prime roofing contractor against financial losses caused by a subcontractor's failure to perform — default, abandonment, bankruptcy, or defective workmanship. Unlike surety bonds, which require a claim against the sub before paying, SDI allows the insured contractor to take immediate action to complete the work and submit costs directly to the carrier. For roofing GCs who subcontract significant portions of work — sheet metal, gutters, skylights, waterproofing — SDI provides faster recovery than traditional surety claims.

Prequalification Program Endorsement

Most SDI policies require the insured contractor to implement a formal subcontractor prequalification program. This endorsement defines the minimum financial, safety, and performance standards each subcontractor must meet before being enrolled in the SDI program. For roofing contractors, prequalification typically includes financial statement review, three-year loss history analysis, bonding capacity verification, and reference checks. The endorsement makes the prequalification process a condition of coverage — failure to prequalify a sub can void coverage for that subcontractor's default.

Completion Cost Coverage

The core SDI coverage — reimbursement for the cost to complete a defaulted subcontractor's scope of work using a replacement contractor. For roofing operations, this includes the premium paid to an emergency replacement sub (typically 25-50% above the original contract price), overtime labor, expedited materials, and project management overhead. Coverage limits are typically set as a percentage of total subcontracted work — often 15-25% of the annual subcontract volume.

Defective Work Correction Coverage

Extends SDI coverage to include the cost of correcting defective work performed by a subcontractor before the default — work that was accepted but later found to be deficient. For roofing contractors, this covers situations where a sheet metal subcontractor's flashing work passes initial inspection but leaks develop within the SDI policy period, requiring tear-out and replacement.

Zurich

Zurich pioneered the SDI product and remains the market leader with the broadest coverage terms and largest capacity. Their Subguard program covers completion costs, delay damages, warranty obligations, and defense costs arising from subcontractor default. Zurich requires rigorous prequalification procedures and typically insures contractors with $50M+ in annual revenue. Their deductible structure involves a per-sub deductible (typically $100,000-$500,000) and an aggregate deductible. Zurich's loss control team assists with subcontractor audits and early intervention when performance issues arise.

Chubb

Chubb offers SubContractor Default Insurance through their construction practice, targeting contractors with $25M-$500M in revenue. Their SDI form includes a unique "pre-default intervention" coverage that pays for temporary supplemental labor and supervision to address performance issues before a formal default — often preventing a claim entirely. Chubb's deductibles are slightly lower than Zurich's, starting at $75,000 per subcontractor. They require enrollment of all subcontractors above a minimum contract value, typically $100,000.

Travelers

Travelers entered the SDI market targeting mid-size contractors with $15M-$100M in revenue. Their program is designed to be more accessible than Zurich or Chubb, with lower minimum premium requirements and simplified prequalification procedures. Travelers' SDI includes built-in coverage for design errors by design-build subcontractors — a gap in some competing products. Their deductibles start at $50,000 per subcontractor, more accessible for mid-market roofing GCs.

Liberty Mutual

Liberty Mutual's SDI program competes with Zurich for large contractor business. Their coverage includes warranty period default — if a subcontractor goes bankrupt during the warranty period and cannot perform warranty repairs, Liberty covers the cost of engaging a replacement contractor. For roofing GCs, this is valuable because roof warranty obligations extend 10-20 years. Liberty requires quarterly subcontractor performance reporting and will adjust coverage terms based on the contractor's portfolio risk profile.

$380,000 — Sheet Metal Sub Abandonment, Chicago, IL

A roofing GC subcontracted $550,000 in architectural sheet metal work on a commercial building. Midway through the project, the sheet metal subcontractor experienced financial difficulties and abandoned the job with 40% of the work incomplete. The roofing GC's SDI policy covered $380,000 in completion costs — including a $280,000 replacement subcontract (60% above the original price due to the emergency mobilization), $55,000 in project delay costs, and $45,000 in additional project management overhead. Without SDI, the GC would have absorbed these costs and pursued recovery through litigation against an insolvent subcontractor.

$215,000 — Defective Waterproofing Application, New York, NY

A roofing contractor's waterproofing subcontractor applied below-deck waterproofing membrane with insufficient overlap and inadequate primer. The defective work was not discovered until water intrusion damaged the occupied floors below. The SDI policy covered $215,000 for complete tear-out and reapplication of the waterproofing system by a replacement subcontractor, plus $65,000 in water damage repairs to the building interior. The original subcontractor disputed the defect findings, but SDI coverage did not require the roofing GC to wait for that dispute to resolve before proceeding with corrections.

$520,000 — Sub Bankruptcy During Large Project, Dallas, TX

A roofing GC on a $3.5M commercial re-roofing project subcontracted $800,000 in insulation and single-ply membrane work. The subcontractor filed for Chapter 7 bankruptcy after completing only 30% of its scope. The SDI policy covered $520,000 in total losses — $420,000 for the replacement subcontractor's mobilization and completion costs, $60,000 in schedule acceleration to recover lost time, and $40,000 in re-inspection costs for work completed by the defaulted sub. The SDI carrier's early warning system had flagged the subcontractor's financial deterioration three months before the default, but the GC chose to continue the relationship.