Your commercial auto policy can cover roofing trailers, but only if the trailer is properly scheduled on the policy or your policy includes blanket trailer coverage. Trailers that are not listed — or not adequately covered — represent one of the most common insurance gaps for roofing contractors. Given that a loaded roofing trailer towed at highway speed is one of the most dangerous pieces of equipment your company operates, this is not a gap you want to discover during a claim.
Liability Coverage for Trailers
Most commercial auto policies automatically provide liability coverage for trailers while they are attached to a covered vehicle. If your dump trailer detaches on the highway and causes a multi-vehicle accident, the liability portion of your commercial auto policy should respond for injuries and property damage to third parties. However, this automatic coverage typically applies only while the trailer is attached or being towed. A detached trailer sitting at a jobsite that rolls into a parked car may trigger your general liability policy instead — or fall into a gap between the two policies.
To eliminate ambiguity, schedule your trailers on your commercial auto policy by VIN. This ensures both attached and detached liability is clearly covered. The additional premium for scheduling a trailer is minimal — typically $100 to $300 per trailer per year for liability.
Physical Damage Coverage for Trailers
Liability is automatic in most cases, but physical damage (comprehensive and collision) for the trailer itself is not. If your $15,000 dump trailer is stolen from a jobsite overnight, or your $8,000 material trailer is destroyed in a collision, you need physical damage coverage on the trailer to recover the loss. Without it, you absorb the replacement cost out of pocket.
Schedule each trailer on your commercial auto policy with comprehensive and collision coverage. Specify the value of the trailer — either actual cash value (ACV) or stated amount — and select a deductible that aligns with your other vehicles. For high-value trailers, such as a $25,000 to $40,000 equipment trailer or a specialty crane trailer, stated amount coverage ensures you recover the agreed-upon value rather than a depreciated ACV.
Contents and Equipment on the Trailer
Here is where roofing contractors frequently get caught. Your commercial auto policy covers the trailer as a vehicle. It does not cover the materials, tools, or equipment loaded on the trailer. A trailer full of $12,000 in shingle bundles, a $3,500 compressor, and $2,000 in nailers is not covered by commercial auto if it is stolen or destroyed. Those items require inland marine (tools and equipment floater) or contractor's equipment coverage.
Think about what your trailer carries on a typical day: roofing materials, power tools, hand tools, generators, compressors, safety equipment, and possibly tear-off debris in a dump trailer. The replacement value of trailer contents can easily reach $15,000 to $30,000. Make sure your inland marine policy limit accounts for the full replacement value of everything that rides on or in your trailers.
Trailer-Specific Risks for Roofers
Roofing trailers are parked at jobsites, left in commercial lots overnight, and towed through residential neighborhoods. They are high-theft targets because they carry valuable tools and are often parked in unsecured locations. According to the National Insurance Crime Bureau, trailer and equipment theft costs the construction industry over $1 billion annually. GPS tracking devices, hitch locks, and wheel locks reduce theft risk and may qualify you for premium discounts.
Towing a loaded trailer also increases your accident severity exposure. A 14,000-pound GVWR dump trailer loaded with tear-off debris extends your stopping distance, increases rollover risk on curves, and magnifies the force of impact in a collision. Carriers evaluate your fleet's towing exposure, and maintaining clean driver records becomes even more important when your crews tow heavy loads daily.
Action Items
Audit your trailer inventory and confirm each unit is scheduled on your commercial auto policy with liability and physical damage coverage. Verify that your inland marine policy covers trailer contents at replacement cost. Confirm that your umbrella policy follows form over trailer-related auto claims. These three steps close the most common trailer coverage gaps for roofing contractors.