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MOST HIGH-SEVERITY ENGINEERING LOSSES HAPPEN ON SITE — NOT IN THE WORKSHOP
Manufacturing risk is controlled. Installation risk is chaotic. You’re working around other contractors, tight programmes, lifting plans, live utilities, shutdown windows, customer assets, and last-minute changes. During commissioning, the line between “construction” and “operation” gets blurred — and disputes about responsibility can escalate quickly.
This page explains the key loss scenarios in installation, commissioning and erection work, what clients and main contractors typically require, and how to structure insurance to avoid gaps between public liability, contract works, plant/tools and professional/design exposure.
What Is Installation, Commissioning & Erection Risk?
Installation risk is the exposure that arises when you move equipment, structures, or systems from controlled manufacture into real-world placement and integration. Erection risk involves lifting and installing fabricated steelwork, platforms, vessels, tanks or process equipment. Commissioning risk is the exposure during testing, calibration and live start-up — where mistakes can cause damage, downtime and safety incidents.
For many engineering firms, installation risk is the biggest driver of severe losses because it combines: high-value assets, live environments, third-party property, tight deadlines and multi-party responsibility.
Where It Shows Up
- Machine installation and line integration
- Factory relocations and refits
- Steel erection and mezzanine/platform installation
- Pipework/ductwork installation in live sites
- Shutdown maintenance and turnaround projects
- Testing, commissioning and acceptance trials
- Upgrades and modifications to customer plant
Why It’s Difficult to Insure
- Liability disputes about “who caused the loss”
- Damage can be to customer assets, not just your work
- “Part being worked on” issues and policy exclusions
- Testing/commissioning phases can be excluded if not agreed
- Hot works and lifting conditions must be met
- Hired-in plant responsibilities under hire contracts
- Consequential loss pressures (downtime, penalties) often uninsurable
Common Installation & Commissioning Loss Scenarios
These are the scenarios that most often lead to claims and disputes in engineering projects. Understanding them helps you build the right insurance structure.
Dropped Loads & Lifting Incidents
Lifting incidents can destroy high-value equipment and create serious injury potential. Loss severity is high because loads are large and the environment is live.
- Crane/rigging failures and slinging errors
- Load shift during movement and collision damage
- Damage to customer plant during placement
- Restricted access routes and turning movements
- Working at height with suspended loads
Hot Works & Fire Damage
Hot works losses can spread beyond your work area quickly. Insurers often impose strict conditions: permits, fire watches, extinguishers and separation controls.
- Cutting, grinding and welding sparks igniting materials
- Fire damage to existing structures and services
- Smoke damage and business interruption knock-on effects
- Hot works conditions not met → claims disputes risk
- Temporary power and electrical risks
Commissioning Faults & System Damage
Commissioning faults often become multi-party disputes. The question becomes: was it a design issue, installation error, programming mistake or client process problem?
- Incorrect settings causing motor/drive damage
- PLC/controls errors leading to mechanical failure
- Incorrect calibration or alignment causing excessive wear
- Integration errors causing production downtime
- Damage to “the part being worked on” disputes
Damage to Contract Works / Materials on Site
Before handover, your work may be exposed to theft, storm and accidental damage. Contract works cover is designed for this — but sums insured and site security conditions must be right.
- Theft of materials or partially installed items
- Storm/flood damage to stored equipment
- Accidental damage by other contractors
- Transit losses during delivery to site
- Testing/commissioning phases excluded if not agreed
How to Insure Installation & Commissioning Risk Properly
Most issues arise because businesses buy the wrong type of cover for the loss scenario. Installation risk usually needs several covers working together.
Public Liability (On-Site Scope)
- Ensure on-site activities are declared (installation, erection, commissioning)
- Confirm hot works and work at height aren’t excluded
- Match liability limits to client requirements
- Clarify treatment of “part being worked on” exclusions
- Consider principals indemnity / additional insured requests
Liability is about third-party injury and property damage. It does not automatically cover your works or materials (that’s contract works).
Contract Works (Installation / Erection All Risks)
- Cover for works in progress and materials on site
- Any one contract value and aggregate set correctly
- Security conditions aligned to site reality
- Testing/commissioning extension if required
- Clear responsibility between you, main contractor and client
Contract works is often demanded by contract. The key is making sure it covers the phase of work you are responsible for.
Tools, Plant & Hired-In Plant
- Own tools and plant on site (including theft conditions)
- Hired-in plant cover if you’re responsible under hire terms
- High-value rigging gear and accessories declared if needed
- Cover for tools in vehicles where appropriate
- Claims process clarity for plant incidents
Professional Indemnity (Where Advice / Commissioning Input Exists)
- If you provide programming, settings, specs or advice, PI may be needed
- Commissioning disputes often involve “advice vs physical work”
- Claims-made structure: notifications and retroactive dates matter
- Contractual promises can make cover difficult (LDs, guarantees)
- Align PI and PL to reduce gaps in allegation handling
Practical Tip: Map Your Risks to Cover
A useful exercise is to map your biggest “bad days” and match them to the policy that should respond. For example: dropped load (liability + works), theft on site (contract works / tools), commissioning error (PI or liability depending on allegation), fire from hot works (liability + property/works) and downtime demands (often contract pressure rather than insurable loss).
How to Reduce Installation & Commissioning Risk
Risk reduction protects profit and improves insurance terms. Insurers respond well to evidence of competence, planning and control.
Site Safety & Planning
- Detailed lift plans with competent appointed person
- Permit-to-work systems (hot works, confined spaces)
- RAMS tailored to each job and site survey evidence
- Interface management with other contractors
- Clear isolation/LOTO procedures for commissioning
- Competence records for riggers, welders, installers
Commissioning Discipline
- Documented test plans and acceptance criteria
- Change control for settings, software and wiring changes
- Independent checks for safety-critical settings
- Record commissioning data and sign-offs
- Handover pack readiness before client operation
- Clear demarcation of responsibilities at handover
FREQUENTLY ASKED QUESTIONS
What is the biggest insurance gap in installation and commissioning work?
The biggest gap is assuming public liability covers everything. Liability covers injury/property damage to others. Contract works covers the works/materials. Tools/plant covers your equipment. PI covers advice/design allegations. You often need more than one.
Does public liability cover damage to the equipment we are installing?
Often not, due to “the part being worked on” type exclusions. Contract works / installation all risks is typically the cover designed for damage to the works in progress, subject to policy wording.
Is testing and commissioning included under contract works?
Not always. Some policies require a specific testing/commissioning extension, or they limit cover to physical installation only. If commissioning is part of your scope, it should be agreed in advance.
Do we need contract works if we’re only a subcontractor?
Sometimes the main contractor provides contract works — but you should verify it covers your scope and values. If there’s doubt, your own contract works cover can prevent disputes and protect cashflow.
Can hired-in plant be covered?
Yes. Hired-in plant cover can be added for equipment you are responsible for under hire terms. This is common for MEWPs, forklifts, generators and specialist lifting kit.
What about customer downtime and consequential loss claims?
Consequential loss is often restricted or excluded, and liability depends on contract terms. Managing contracts and setting realistic liability caps is a key risk control, alongside insurance.
If a commissioning setting error causes damage, is that PI or liability?
It depends on the allegation. If it’s framed as negligent advice or design/spec error, PI may respond. If it’s physical property damage arising from operations, liability may respond. A joined-up programme helps avoid gaps.
What information do insurers need to quote installation risk?
Turnover split (workshop vs site), nature of site activities, maximum contract value at risk, lifting/hot works details, claims history, and whether you commission/programme equipment. Security and competence controls also matter.
How can we reduce premiums for installation/erection insurance?
Evidence of competence and control: lift plans, permits, RAMS, training, documented commissioning procedures, and strong contract management. Insurers price uncertainty — strong evidence improves terms.
How can Insure24 help?
We help map your real loss scenarios to the right covers, align contract works and liability responsibilities, and structure a programme that reduces gaps across on-site work, tools/plant, transit and PI exposure.
INSURE YOUR INSTALLATION & COMMISSIONING RISK
WITH ENGINEERING-AWARE COVER
Installation and commissioning losses are high severity and contract-driven. Insure24 helps engineering businesses structure liability, contract works, tools/plant, transit and PI where needed — so you’re not exposed to gaps when claims happen.
WHAT WE HELP YOU PROTECT
- Works in progress and materials on site
- Customer property and third-party liability exposures
- Tools, plant and hired-in equipment responsibilities
- Commissioning and advice-related disputes
- Transit losses and contract-driven requirements
WHY INSURE24
- Engineering-aware broking and insurer presentation
- Clear mapping of risks to cover to reduce gaps
- Support with contract works and commissioning extensions
- Fast access to leading UK commercial markets
- Ongoing support as your site work changes