Liability Insurance for Work at Height – What a Subcontractor Should Have and How to Verify It

In work-at-height subcontracting, liability insurance is rarely a simple two-party relationship – in the investor – general contractor – subcontractor chain, liability for damage can branch out in several directions at once, and as the general contractor you are usually the first party to receive a claim, regardless of who was actually at fault. This article does not repeat the full list of questions about policy scope – it focuses on how a subcontractor’s liability insurance functions within the liability chain typical of construction subcontracting.

Why This Is Not Just a Formality to Tick Off

Liability insurance is often treated as just one item on the list of documents to collect before signing a contract – as important as certificates or references, but not necessarily a priority. In practice, for work at height, this document is precisely what determines who actually covers the cost of damage if an incident occurs despite all the safeguards – and the scale of potential damage in work at height (a damaged high-value facade, an injured passer-by, damage to property surrounding the work site) can be disproportionately high compared to the value of the contract itself.

For this reason, it is worth treating verification of a subcontractor’s liability policy not as a formality equal in weight to other checklist items, but as one of the absolutely key factors determining whether, in the event of a problem, the general contractor ends up with a real, covered claim – or with an empty, unenforceable promise from a contractor who has nothing to cover the damage with.

The Liability Chain – Who Pays If Something Goes Wrong

An investor usually directs a claim first to the general contractor, with whom they have a signed contract – regardless of the fact that the physical work was carried out by a subcontractor. Only afterwards does the general contractor seek reimbursement from the subcontractor, based on the terms of the subcontract agreement and the subcontractor’s liability policy. This means that a gap in the subcontractor’s insurance becomes, in practice, the general contractor’s problem, even if formal responsibility for carrying out the work rested with someone else.

Liability Clause for Further Subcontractors – Why This Provision Is Critical

If the work-at-height subcontractor itself uses further subcontractors (which happens in the industry more often than one might expect), its liability policy must explicitly cover their actions. Without this extension, in the event of damage caused by a worker not formally employed by your direct contractor, you could be left with a coverage gap that no one anticipated at the contract-signing stage.

What to Include in the Subcontract Agreement Regarding Liability Insurance

• A minimum sum insured appropriate to the value of the property and the scale of the project, rather than automatically accepting the standard minimum sum offered by the subcontractor.
• An obligation to provide a copy of the policy before work begins, not only on request after the fact, when it is much harder to enforce.
• A commitment to notify of policy expiry or changes in scope during the course of the work – especially for longer contracts.
• Confirmation that the policy covers work at height – some standard policies exclude or significantly limit this specific risk, treating it as elevated and special.
• An extension to further subcontractors, if your direct contractor uses subcontracting.

Each of these points is worth moving from general sales conversation directly into the contract text – a verbal assurance that “we’ve got it covered” means nothing if, in the event of damage, the policy does not actually cover the situation and the contract did not specify the requirement.

Dual Insurance – Is It Worth Requiring a Separate Policy Even With the General Contractor’s Coverage

Some general contractors have their own broad liability policy covering the entire project and assume this is sufficient protection regardless of whether the subcontractor has their own. This is a risky assumption – a general contractor’s policy usually has exclusions for work at height as an elevated risk, and its sum insured is shared across all risks on the site, not dedicated to a specific subcontractor. Requiring a separate policy from the work-at-height subcontractor, alongside the general contractor’s coverage, is an additional layer of protection, not unnecessary duplication.

How to Match the Sum Insured to the Scale of the Project

There is no single universal sum insured that works for every project – the appropriate value depends on several factors worth assessing before setting the requirement in the subcontract agreement. The value of the property in the immediate vicinity of the work (the facade of a historic building, the glass facade of a Class A office building, an expensive technical installation on the roof) is the first, obvious factor – the higher the potential value of the damage, the higher the sum insured that should be required. The second factor is the intensity of third-party traffic in the work zone – a city-center building with heavy foot traffic generates a higher risk of personal injury than an isolated industrial facility.

It is also worth taking into account the duration and complexity of the job itself – long-lasting, multi-stage work on a complex structure statistically carries a higher risk of an incident than a short, simple intervention. Rather than adopting one fixed sum insured for all projects regardless of their actual nature and risk level, it is far more reasonable to tailor this requirement individually to each specific project, consulting your own insurance broker or legal department when needed.

Common Exclusions in Liability Policies Covering Work at Height

General business liability policies often contain exclusions or limitations for specific, elevated risk categories – and work at height is sometimes one of them, if the policy has not been specifically extended to cover it. Pay particular attention to provisions specifying a particular height above which coverage no longer fully applies or requires additional, separate confirmation, exclusions concerning work using rope access techniques as opposed to work on scaffolding or an aerial platform, and limitations concerning damage arising from work under special conditions, such as ATEX zones or work near live electrical installations.

Verifying these exclusions requires reading not just the insurance certificate itself, but the general terms and conditions (GTC) that the policy refers to – a document that is rarely sent along with the confirmation of coverage, and it is precisely there, in the small print, that the most significant exclusions and limitations of the insurer’s liability are hidden, ones that are easy to overlook when only skimming the certificate.

Assignment and Recourse – What Happens After a Claim Is Paid

After a claim has been paid to the investor or an injured third party, the general contractor’s insurer (if it was the one that covered the damage first) may seek reimbursement from the subcontractor through recourse – provided the subcontract agreement clearly and precisely defines the full scope of the subcontractor’s liability for this type of damage. A lack of precise provisions at this critical point seriously hampers recovery of funds, even if the subcontractor’s fault is, from a technical standpoint, entirely obvious.

Recourse can be a lengthy process, which is why a better solution is a claim-reporting path agreed in advance, going directly to the subcontractor’s insurer with the general contractor as the injured party – this shortens the time to actual payout and reduces the number of unnecessary intermediate steps in what is often a long claims process.

Liability for Property in Care Versus General Liability

It is worth distinguishing between two different scopes of coverage in a liability policy that are easy to confuse: general public liability, covering damage caused to third parties and their property in connection with the business’s operations, and liability for property in care, custody, or control, covering specifically the elements of the building the subcontractor is working on – for example, the facade, the roof structure, or an installation they have access to during the work. A standard general liability policy does not always automatically cover this second scope, and it is precisely this scope that matters most in work at height, where the technician works directly on elements of the client’s building.

When signing the contract, it is worth asking directly whether the policy covers damage to the property being worked on, or only damage caused to bystanders outside the work zone. The difference can be financially significant – damaging a costly facade during cleaning or installation is an entirely different risk category from injuring a passer-by, and both require separate confirmation within the policy’s scope.

Verifying the Policy – A Practical Step Before Signing the Contract

Beyond simply requesting a copy of the policy, it is worth verifying that the entity name on the document matches the name of the company you are actually signing the contract with – a simple but surprisingly often overlooked step, especially when the subcontractor operates as part of a group of several formally related companies. We described the full list of questions about policy scope, sums insured, and common liability exclusions in detail in our article on liability insurance for a work-at-height company – a piece worth going through point by point before signing any subcontract agreement.

Frequently Asked Questions

Is the subcontractor’s liability policy enough, or is it worth also requiring employer’s liability insurance?
These are two different types of coverage – general liability protects third parties and their property, while employer’s liability covers claims made by workers against their own employer in the event of a workplace accident. It is worth checking that the subcontractor has both, not just one of them.

How long after the work is completed does insurance coverage for potential defects last?
It depends on the specific policy’s terms – some include a so-called run-off period, while others end coverage when the policy itself expires. This is worth clarifying explicitly for jobs where defects may only surface after a longer period, for example with anti-corrosion work.

Can I require the subcontractor to name me as an additional insured on their policy?
In some cases this is possible, and it gives the general contractor direct access to coverage under the subcontractor’s policy, without having to go through the recourse process. It is worth discussing this option with the subcontractor and their insurer already at the contract negotiation stage.

What if the subcontractor has a policy with a lower sum insured than required, but agrees to raise it for the duration of a specific job?
This is a common and acceptable practice – however, it is worth obtaining written confirmation of such a temporary extension of the policy, rather than relying solely on a verbal statement that “the insurer agreed”.

How We Handle This

We send a copy of our current liability policy before signing the contract and are ready to discuss the scope of coverage in the context of a specific project, including any extensions required by the general contractor. Check our range of services or get in touch with us to discuss this before the quote.

If your project requires a non-standard sum insured or confirmation of specific policy extensions – for example, coverage for property in care or for further subcontractors – let us know early in the discussions, so we can calmly verify this with our insurer before the contract is signed, rather than under time pressure during the job itself.

Related Topics

Insurance is just one of several elements in verifying a subcontractor – we covered the full checklist, including team certificates and warning signs in a quote, in our article on choosing a work-at-height subcontractor.