Every contractor has had the experience of materials sitting on a job site overnight, in the back of a truck, or in a rented storage unit waiting for the schedule to catch up. HVAC units on a pallet. Cabinets in a garage. Copper wire on a spool. Until those materials are installed and the owner accepts the work, they are usually still your financial responsibility, and the policies most contractors carry may not cover them.
Two coverages address this window: the installation floater and builder’s risk. They overlap in places, but they are designed for different situations, and knowing which one applies to your work can prevent an expensive surprise.
Why General Liability Does Not Help Here
The first thing to understand is that general liability is not property coverage for your own stuff. It responds to bodily injury and property damage you cause to others. If your materials are stolen from the site or destroyed in a fire, that is a first-party loss, and general liability typically has nothing to say about it.
Your commercial property policy, if you have one, usually covers business personal property at your own premises. Many forms include a small amount of coverage for property away from the premises, but the limits are typically modest and may not extend to property at a job site, in transit, or in temporary storage. A contractor’s equipment floater covers tools and equipment, not the materials you are installing. That leaves a gap that installation floaters and builder’s risk are built to fill.
What an Installation Floater Typically Covers
An installation floater is an inland marine policy that covers materials, supplies, and equipment you are installing as part of a project, from the time you take possession until the installation is complete and accepted. It generally follows the property while it is in transit to the site, while it is stored at or near the site, and while it is being installed.
It is usually written for a specific trade’s scope rather than the whole project. An electrical contractor might cover wire, panels, and fixtures. A mechanical contractor might cover units, ductwork, and controls. Coverage is often on a blanket basis with a per-job limit and a catastrophe limit, so you do not have to schedule every project individually.
The perils are typically broad and may include theft, fire, wind, vehicle collision, and vandalism, though flood and earthquake may be excluded or sublimited. Many forms include coverage for property in temporary storage away from the site, which matters when a job is delayed and materials end up in a rented warehouse.
What Builder’s Risk Typically Covers
Builder’s risk covers the entire structure under construction, including the materials that become part of it, from groundbreaking until the project is complete. It is usually purchased by the owner or the general contractor, and it protects the interests of everyone with a stake in the building, often naming subcontractors as additional insureds.
The scope is broader than an installation floater because it covers the whole building, not just one trade’s materials. It also typically responds to things like soft costs and delay in completion when those coverages are added. But it comes with its own conditions. It generally ends at completion or occupancy, it may not cover materials stored off-site unless specifically endorsed, and it often carries a deductible that a subcontractor would have to absorb if the loss is attributed to their scope.
When You Need Which One
If you are a subcontractor on a project where the owner or GC carries builder’s risk, ask to see the certificate and confirm three things: that you are covered as an insured, that the deductible is something you can live with, and that your materials are covered while in transit and in storage before they reach the site. If any of those answers is no, an installation floater fills the gap.
If you work primarily on renovation, tenant improvement, or service jobs where no one buys builder’s risk, the installation floater is typically your only protection for materials before they are installed. Small commercial remodels and residential work often fall into this category.
If you are the general contractor on a ground-up project, builder’s risk is generally the appropriate form, and you should confirm whether the contract requires you or the owner to buy it. Do not assume the owner has it.
The Contract Usually Decides
Construction contracts almost always address this. The standard industry forms typically place the obligation to buy builder’s risk on the owner, but modified contracts often shift it to the contractor. Subcontract agreements frequently require the sub to insure their own materials until installation. Read the insurance and risk-of-loss sections carefully. If the contract says materials are at your risk until acceptance, you need coverage that matches that language.
Common Gaps to Ask About
Several scenarios come up repeatedly in claims, and they are worth checking against any quote you receive. Materials stolen from a locked job trailer or a fenced site. Property damaged in transit in your own truck versus a supplier’s truck. Materials stored at your shop or a third-party warehouse for weeks because the schedule slipped. Testing and commissioning damage, where a unit is destroyed during startup. Items installed but not yet accepted when a loss occurs. Each of these may be covered, excluded, or sublimited depending on the form, and the differences between carriers are real.
Talk to an Agent Who Reads Construction Contracts
Because the right answer depends on your trade, your contracts, and who else is insuring the project, this is an area where a generic quote can miss the mark. An independent agent who works with contractors regularly can review your subcontract language, compare installation floater forms, and confirm that the coverage you are buying actually lines up with the risk of loss you have agreed to carry.