Infrastructure projects—roads, bridges, drainage, utilities, groundworks and wider civil engineering—carry a different risk profile to typical building works. You’re dealing with live traffic management, buried services, heavy plant, high-value materials, public interfaces, environmental exposure, and tight contractual obligations. The right insurance programme isn’t just a tick-box; it’s often a contract requirement and a key part of protecting cashflow when something goes wrong.
This guide explains the core covers infrastructure contractors typically need in the UK, what to watch for in contracts, and how to avoid the most common gaps.
“Infrastructure construction insurance” usually refers to a package of policies that protect:
The works (the project itself while it’s being built)
Your legal liability to third parties (public, clients, neighbours)
Your people (employees and labour-only subcontractors)
Your equipment (owned and hired-in plant)
Your finances (delays, professional errors, cyber incidents)
Depending on the project, it may be arranged as:
Contractor-arranged annual cover (your own annual programme)
Project-specific cover (a single contract, often higher limits)
Owner Controlled Insurance Programme (OCIP) or principal-arranged insurance (less common in SME civil works, but seen on major schemes)
Civil and infrastructure works often involve:
Excavation and trenching (collapse, flooding, undermining)
Working near live services (gas, electric, fibre, water)
Traffic management and public access (injury, vehicle damage, claims frequency)
Hot works (asphalt, welding, cutting)
Environmental exposures (pollution, silt run-off, fuel spills)
Design responsibility (temporary works, drainage calculations, setting out)
Contractual penalties (liquidated damages, delay costs)
A standard “builders policy” can be too narrow if it doesn’t address these realities.
Public liability covers your legal liability for injury to third parties or damage to their property arising from your business activities.
Why it matters in infrastructure: you’re often working in public spaces—roads, footpaths, near homes and businesses—so claim frequency can be higher.
Typical limits: £2m, £5m, £10m or more depending on the contract.
Key extensions to consider:
Vibration, weakening and removal of support (VWRS) (critical for excavation and groundworks)
Underground services damage cover (often with sub-limits)
Working away risks (if your policy is written around a yard/office)
Hot works conditions (ensure you can comply)
Defective workmanship wording (liability for resulting damage vs. the cost to redo your own work)
Common gap: a low sub-limit for underground services that doesn’t match the reality of a fibre trunk line, high-pressure gas main, or critical water supply.
Employers’ liability is legally required in most cases if you employ staff. It covers injury or illness claims from employees.
Typical limit: £10m (standard in the UK).
Infrastructure-specific considerations:
Labour-only subcontractors and casual labour arrangements
Work at height, confined spaces, night works
Plant operations and banksman duties
Common gap: misunderstanding who counts as an “employee” for EL purposes. If you direct and control labour-only subcontractors, you may still need to cover them.
CAR (often called contract works) covers physical loss or damage to the works in progress, including materials on site, and sometimes off-site storage and transit.
What it can cover:
Damage to newly laid asphalt, kerbs, drainage runs
Theft of materials (copper, fuel, tools—subject to conditions)
Storm and flood damage to excavations or temporary works
Accidental damage during construction
Key details to get right:
Sum insured (maximum contract value at any one time)
Single contract limit (largest job you undertake)
Maintenance/defects liability period (often 6–24 months)
Off-site storage and transit limits
Own plant vs. hired-in plant (often separate)
Common gap: assuming the principal’s insurance covers the works when the contract actually makes the contractor responsible.
Plant cover protects owned equipment—excavators, dumpers, rollers, generators, breakers—against theft and accidental damage.
Hired-in plant is often a separate section or extension, and it’s vital because hire agreements typically make you responsible for loss/damage.
Key considerations:
Security requirements (immobilisers, trackers, locked compounds)
Overnight storage conditions (especially for small tools)
Any “in transit” cover (trailers, vans, site-to-site)
Excess levels and age/condition of plant
Common gap: hired-in plant not declared or not covered to the hire company’s required terms.
You might not think of PI as a “civil works” policy, but it becomes relevant if you:
Provide design, specification, or calculations
Take responsibility for temporary works
Offer surveys, setting out, or drainage design
Work under design-and-build or NEC contracts with design obligations
PI covers claims arising from professional negligence (financial loss, rectification costs, and sometimes resulting damage depending on wording).
Common gap: contractors taking on “fitness for purpose” obligations in contracts—this can be uninsurable or very hard to place.
Infrastructure works can create pollution exposures:
Fuel and hydraulic oil spills
Silt run-off into watercourses
Contaminated land discovery
Sewer overflows or accidental discharge
Some public liability policies include sudden and accidental pollution only, often with tight sub-limits.
For higher-risk work, consider a standalone environmental policy or specific extensions.
BI is sometimes overlooked by contractors, but it can be valuable if a major incident (fire, flood, theft) disrupts your operations and revenue.
For infrastructure contractors, BI often pairs with:
Material damage at your premises (yard, workshop)
Plant breakdown or loss of key equipment nBI won’t usually cover project delays as such (that’s a different risk), but it can protect your business’s ability to trade.
Many infrastructure contracts include:
Liquidated and ascertained damages (LADs) for late completion
Performance bonds and parent company guarantees
Strict traffic management windows and possession times
Insurance doesn’t typically cover LADs as a straightforward “pay-out.” However, the right programme can reduce the chance that an insured event (e.g., storm damage to works, theft of materials, plant loss) becomes a catastrophic cashflow issue.
If delay risk is critical, speak to a broker about specialist covers such as Delay in Start-Up (DSU) on larger schemes (more common in major projects than SME works).
Infrastructure clients (local authorities, utilities, principal contractors) often specify:
Minimum PL limit (often £5m or £10m)
EL at £10m
Contract works to full reinstatement value
Indemnity to principal clauses
Waiver of subrogation (sometimes)
Joint names insurance (sometimes)
Specific endorsements for underground services, VWRS, pollution
Tip: Don’t wait until the day before mobilisation. Send the contract insurance schedule to your broker early so endorsements can be negotiated.
Damage to services is one of the most common and expensive civil claims.
Watch for:
Low sub-limits
High excesses
Conditions around service scans, permits to dig, and method statements
Most policies won’t pay to redo your own faulty work, but may cover the resulting damage.
Example: a poorly compacted trench backfill may not be covered for the cost of rework, but if it leads to a collapse damaging a third-party vehicle, the liability claim may be covered.
Insurers may impose conditions around:
Temporary works design
Dewatering
Weather monitoring
Site security and out-of-hours checks
Asphalt and welding can trigger strict conditions (fire watch, extinguishers, permits). If you can’t comply, you need different terms.
Insurance generally covers liability you would have at law. If you accept liability beyond negligence (e.g., “fitness for purpose”), you may create uninsured exposure.
A practical way to set your programme is to map:
Largest single contract value you undertake
Maximum total contract value running at any one time
Plant values (owned and hired-in)
Worst-case third-party loss (busy road, city centre, near critical infrastructure)
Client requirements (minimum limits)
If you’re unsure, start with the contract requirements and then stress-test them against your real exposures.
Service strike: an excavator hits a fibre duct, taking down connectivity for a business park. Claim includes repair costs and third-party losses.
Traffic incident: temporary barriers are moved overnight; a vehicle collides, leading to injury claims and legal costs.
Flooded excavation: heavy rain overwhelms pumps, undermines a carriageway edge and damages newly installed drainage.
Plant theft: a tracked excavator is stolen from a poorly secured site; hire replacement costs add pressure to the programme.
These are exactly the kinds of events where the right policy wording and adequate limits make the difference.
Expect questions on:
Turnover split (roads, utilities, rail, water, general civils)
Typical and maximum contract values
Depth of excavations and use of trench boxes/shoring
Traffic management competence and subcontractors used
Hot works frequency
Plant security measures
Claims history and lessons learned
Accreditations (e.g., CHAS, Constructionline) and H&S systems
A clear, honest submission with evidence of controls often leads to better terms.
Do you have the PL limit your client requires?
Do you have VWRS and adequate underground services cover?
Is your contract works sum insured high enough for your busiest period?
Are hired-in plant and tools included?
Do you have cover for off-site storage and transit?
Are you taking on any design responsibility that needs PI?
Are pollution exposures addressed (at least sudden and accidental)?
Can you comply with key policy conditions (hot works, security, permits to dig)?
Infrastructure construction is essential work—but it’s also high-stakes. The best insurance programme is built around your contracts, your real-world site exposures, and the way you actually operate day-to-day. If you’re tendering for new types of work (deeper excavations, higher-value utilities, city-centre schemes), it’s worth reviewing your cover before you sign.
If you want, share your typical contract value range, the main type of civils work you do (roads, drainage, utilities, groundworks), and whether you take on any design/temporary works responsibility—then the cover can be tailored to match.
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