An installation floater covers a contractor's own materials and equipment while they are in transit, in storage, and being installed. Builders risk covers the structure under construction and the on-site materials that will become part of it. The choice usually turns on three facts: who has the risk, what property is exposed, and when coverage needs to start and stop.
For an agency, the question often starts with a certificate request or a contract review. Getting it wrong can leave building materials uninsured between delivery and acceptance, or leave a subcontractor paying a loss the owner's policy was meant to absorb.
What Is Installation Floater Insurance?
Installation floater insurance is a form of inland marine insurance. It follows property the contractor is responsible for installing, from the time it leaves the supplier until the work is finished and the contractor's interest ends. Typical property includes HVAC systems, rooftop units, generators, security systems, glass panels, curtain wall panels, and custom fixtures.
When a client asks what an installation floater is, a simple answer is: it insures the contractor's portion of the job, not the whole building. That narrow coverage is one reason premiums are usually lower than for builders risk.
What Installation Floater Coverage Includes and Where Builders Risk Starts
Details vary by carrier, but a typical floater responds in three stages:
- Materials in transit from the supplier or shop to the job site.
- Temporary storage on site or off site before the installation phase.
- The installation process, until the work is complete and accepted.
Some forms also cover tools and equipment, although many carriers expect those on a separate contractor's equipment floater.
Builders risk, also called course of construction insurance, is property insurance on the building itself. The ISO Builders Risk Coverage Form (CP 00 20) covers the building while it is being built, plus materials and supplies at or near the construction site. Coverage usually runs from groundbreaking until the building is occupied, accepted, or put to use, whichever the policy names first.
Property owners or general contractors usually buy a general builders risk insurance policy, depending on the contractual obligations in the contract. Many forms can add soft costs, such as extra interest after construction delays, and debris removal limits. On renovation projects, the existing building usually needs separate coverage or an endorsement, so ask early on major renovations.
Installation Floater vs Builders Risk Side by Side
The table compares the two coverages on the points that drive most coverage questions.
| Point | Installation floater | Builders risk |
|---|---|---|
| Coverage scope | One contractor's materials during shipping, storage, and installation | The whole building plus materials for it |
| Insured party | The contractor or subcontractor doing the work | The owner, the general contractor, or both |
| Coverage duration | From shipment until installed and accepted | From the start of work until occupancy or acceptance |
| Project application | Single trades on new construction or remodels | Commercial construction and residential builds |
| Cost | Usually lower, narrower scope | Usually higher, broader scope |
| Perils | Named peril policy or open perils form, by carrier | Often written on a special causes of loss form |
| Existing structure | Not covered | Usually needs separate coverage or an endorsement |
Builder's risk is the more comprehensive coverage for the building, but many large projects use both. The general contractor's policy covers the project, and subcontractors carry floaters for property they handle before installation. That layered approach closes coverage gaps only when the two policies are written to work together.
When an Installation Floater Policy Adds Extra Protection
A floater can make sense even when builders risk is in place. Builders risk forms may exclude property until it reaches the site, cap off-site storage, or limit transit. A subcontractor installing specialty equipment, such as switchgear for a data center build, may also want its own limits and deductible.
Consider a hypothetical glazing subcontractor on a $12 million office building. It stores $400,000 of specialty glazing and architectural metalwork at its own yard for six weeks. If the owner's builders risk covers only materials at or near the site, a contractor's installation floater with an off-site storage limit of at least $400,000 closes that gap.
How Agents Review Installation Floater Claims and Limits
Check these items before a loss, not after:
- The contract: who buys builders risk, and who is named on it.
- Policy limits against the peak value of high-value materials.
- Any coinsurance requirement, since underinsurance can cut a claim payment.
- Policy exclusions for weather-related events, theft, and faulty workmanship.
- The end point: acceptance, substantial completion, or financial interests ending.
- Whether an installation floater endorsement or a project-based policy fills gaps better.
Write down which policy responds at each stage of the project lifecycle and share it with the insured. An insurance agent or insurance broker who places construction insurance coverage can then quote the right mix.
Frequently Asked Questions About the Installation Floater
When does installation floater coverage end?
It usually ends when the property is installed and the work is accepted, or when the contractor no longer has an insurable interest. The exact trigger is in the form, so read it. After that, the builder's risk policy generally covers installed materials until project completion.
Who buys builders risk, the owner or the contractor?
Either one can, depending on the construction contract. The project owner often buys it on larger commercial jobs, while a general contractor may buy it on smaller jobs or when the contract requires it. Make sure every party with an insurable stake is named on the policy.
Is a floater cheaper than builders risk?
Usually, because it covers a narrower set of property for a shorter time, the trade-off is scope. It protects only the contractor's materials and work, so it doesn't replace builders risk for the whole building.
Can a contractor carry both policies on one construction project?
Yes. Many contractors carry a floater for their own materials during construction, while the owner or general contractor carries builders risk on the building. Review the two together so a loss during transit or off-site storage is not left uncovered.
What causes disputes between a floater and builders risk?
Timing and ownership. Disputes arise when items are partially installed, no one is sure who owns delivered materials, or one policy excludes work the other covers. An insurance professional can prevent many of them by matching both policies to the contract before work starts.
