My Account
We compare quotes from leading insurers
ON-SITE ENGINEERING WORK IS WHERE SMALL ERRORS BECOME BIG LOSSES
Off-site manufacturing is controlled. On-site installation is not. You’re working around other contractors, live environments, tight access routes, lifting plans, shutdown windows, permits, and customer operational pressures. One dropped load, one misalignment, or one commissioning fault can create six-figure damage and major downtime claims.
On-Site Installation & Erection Engineering Insurance is designed for engineering businesses that install machinery, pipework, conveyors, fabricated structures, production lines, HVAC, plant and equipment — and need cover that follows the work to site: liability, contract works, hired-in plant, tools, transit, and (where needed) professional/design exposure.
Who Needs Installation & Erection Engineering Insurance?
This insurance is designed for engineering businesses that carry out on-site installation, erection, fit-out, commissioning or integration works — either as a main contractor or subcontractor. Typical activities include:
Installation / Mechanical Engineering
- Machinery installation and commissioning
- Conveyor lines, automation integration and plant fit-outs
- Pipework, ducting and mechanical services installation
- Industrial maintenance shutdown work
- Machine relocation, removal and reinstallation
- Packaging lines, process equipment and production cells
Erection / Structural / Fabrication On-Site
- Steel erection and installation of fabricated structures
- Platforms, mezzanines, gantries and safety structures
- On-site welding and coded welding operations
- HVAC and plant room installation (where applicable)
- Silo, tank and process vessel installation
- Industrial cladding and building envelope systems (if relevant)
On-site work is typically contract-heavy. Customers often require specific liability limits, evidence of “contract works” insurance, and cover for tools/plant used on their premises. If you operate under JCT/NEC style contracts or heavy OEM terms, insurance should be structured around the real contractual risk — not generic assumptions.
Key Risks on Installation & Erection Projects
On-site engineering losses are often high severity because they involve heavy loads, working at height, live customer environments and strict timelines. Even when there’s no injury, damage to customer property and the knock-on downtime can create large claims.
Site Liability & Customer Property Damage
- Damage to existing plant, buildings and services
- Fire damage from hot works, cutting, grinding or welding
- Escape of water/oil/air damaging customer equipment
- Impact damage from MEWPs, forklifts and site vehicles
- Accidental activation of systems causing loss
- Claims for “making good” and associated costs
Lifting Operations & High Severity Events
- Dropped loads and crane incidents
- Rigging failures, slinging errors and load shift
- Restricted access routes and collision risks
- Working at height and fall hazards
- Damage to high-value machinery during placement
- Third-party injury potential during heavy lifts
Contract Works Damage & Installation All Risks
- Damage to works in progress before handover
- Theft of materials or partially installed items
- Storm or flood damage to materials stored on site
- Transit damage to items being delivered to site
- Testing and commissioning loss scenarios
- Handover disputes following damage events
Commissioning Errors & Design/PI Exposure
- Incorrect alignment, calibration or commissioning settings
- Integration faults causing system failure or downtime
- Advice/specification changes creating professional liability
- Incorrect method statements leading to loss
- Control system errors and programming mistakes
- Multi-party disputes (main contractor vs subcontractors)
What Insurance Does an Installation & Erection Engineer Need?
Installation and erection work needs insurance that follows the job — including the site, the works in progress, and the equipment you bring onto site. Most claims fall into two buckets: liability to others and damage to the contract works/plant/tools.
Here are the most common covers (and why they matter):
Public Liability (including on-site work)
Public Liability covers third-party injury and property damage arising from your operations. For installation engineers, the key is ensuring it includes your on-site activities, hot works, and the right liability limits for customer contracts.
- Damage to customer property and plant
- Injury to third parties and other contractors
- Contractual liability considerations (where insurable)
- Territory cover if you work overseas
- Principal’s indemnity / additional insured requests
Employers’ Liability (for your site teams)
Employers’ Liability is typically required if you employ staff. On-site work increases exposure: working at height, lifting operations, confined spaces, and interaction with other contractors. Insurers will consider your safety culture and training.
- Injury claims for installers, welders and site engineers
- Manual handling and heavy component movement
- Working at height and access equipment risks
- Hot works and burns exposure
- Defence costs and compensation (subject to policy terms)
Contract Works / Erection All Risks / Installation All Risks
Contract Works (often arranged as Erection All Risks / Installation All Risks) covers damage to the works in progress and materials while on site and during installation, subject to policy conditions.
- Damage to materials and partially installed works
- Theft from site (subject to security requirements)
- Storm/flood damage to items stored on site
- Testing and commissioning phases (wording dependent)
- Handover and practical completion considerations
This cover is often demanded in contracts. The crucial detail is aligning sums insured to contract values and clarifying who is responsible for arranging it (you, the main contractor, or the client).
Tools, Plant, Hired-In Plant & Equipment on Site
Installation engineers rely on tools and plant on site: MEWPs, telehandlers, forklifts, welding sets, generators, torque tools, calibration kits, and specialist rigging. Plant and tools cover protects your own equipment and can be extended for hired-in plant you are responsible for.
- Own plant and equipment on site
- Hired-in plant (where you are responsible under hire terms)
- Tools and portable equipment (including in vehicles where arranged)
- Coverage for theft and accidental damage (policy dependent)
- Rigging gear and lifting accessories (where specified)
Goods in Transit (to and from site)
If you move machinery, fabricated structures or components to site, transit cover protects against loss or damage in transit. Without it, a single incident can wipe out margin on a project.
- High-value items delivered to site
- Theft from vehicles and depots (subject to conditions)
- Damage during loading/unloading (wording dependent)
- International transit options if you ship overseas
- Alignment with Incoterms and contract responsibilities
Professional Indemnity / Design Liability (where you design or advise)
Installation engineers often provide advice, method statements, integration plans, commissioning settings, or minor design/spec changes. If the allegation is “your advice caused the loss”, you may need PI/design cover.
- Commissioning and integration advice
- Method statement and temporary works exposures
- Control system settings and programming (where applicable)
- Design/spec changes requested on site
- Claims-made nature (retroactive date and notification discipline)
Common “Gotchas” on Installation Projects
These are frequent reasons claims get disputed. We build cover around them:
- Hot works exclusions or strict conditions not followed
- Work at height and lifting operations not declared
- Damage to “the part being worked on” not covered under liability
- Contract works responsibility unclear between parties
- Testing/commissioning phases excluded under works cover
- Hired-in plant not covered but you’re liable under hire terms
How to Reduce Installation & Erection Engineering Claims
Good insurance matters — but insurers also reward good controls. Strong site discipline reduces losses and improves your renewal terms.
Site Controls & Safety Culture
- Lift plans, competent slingers/signallers and rigging checks
- Hot works permit system and fire watch discipline
- RAMS that reflect reality, not generic templates
- Pre-start site surveys and interface management
- Toolbox talks and documented competence/training
- Clear isolation/LOTO procedures during commissioning
Contract & Documentation Discipline
- Define scope clearly and record variations in writing
- Clarify who insures contract works and at what values
- Agree acceptance criteria and handover process
- Control subcontractors and ensure they carry adequate cover
- Record commissioning settings and change approvals
- Keep photo evidence and sign-off trail for key stages
FREQUENTLY ASKED QUESTIONS
What is the difference between public liability and contract works insurance?
Public liability covers third-party injury and property damage arising from your operations. Contract works (installation/erection all risks) covers physical loss or damage to the works in progress and materials while they’re being installed, subject to the policy.
Do we need contract works if the main contractor says they have it?
Possibly not — but you should verify it in writing and confirm it covers your scope, values and the phases of work (including testing/commissioning if required). Many disputes arise from assumptions about “who arranged it”.
Are lifting operations automatically covered?
They may be, but you must disclose the nature of work and ensure the policy doesn’t exclude lifting, work at height or hot works. Some policies impose conditions (competence, lift plans, exclusion of certain crane operations).
Does insurance cover damage to the item we are installing?
Liability policies often exclude damage to “the part being worked on”. Contract works / installation all risks can cover the works in progress. The right answer depends on contract structure and policy wording — we’ll help align it.
Can hired-in plant be included?
Yes, hired-in plant cover can often be added when you are responsible under hire terms (e.g., MEWPs, forklifts, generators). Values and hire conditions need to be declared.
Do we need Professional Indemnity for commissioning and advice?
If you provide advice, method statements, integration plans, programming, or design/spec changes, PI/design liability can be relevant. Many disputes hinge on whether the loss was caused by “advice” rather than physical work.
Will insurance cover customer downtime or loss of production?
Claims for customer downtime are complex and often depend on liability being established and contract terms. Many contracts try to impose consequential loss exposures. We’ll help you understand what’s insurable and how to manage contract terms.
We do shutdown work in factories — what should we tell insurers?
Tell insurers about the site types (food, chemical, heavy industry), hot works, working at height, lifting operations, and the value of equipment being worked on. Shutdown work can be higher hazard due to compressed schedules and live environments.
How are contract works sums insured calculated?
Usually based on the maximum contract value at risk at any one site, including materials and labour that would be lost if the works were damaged before handover. If you run multiple projects, we may set an “any one contract” limit plus an aggregate.
How quickly can Insure24 quote installation engineering insurance?
Once we have your turnover split (workshop vs site), typical contract values, maximum contract at risk, claims history and required liability limits, we can approach markets quickly. Higher-risk work may need a fuller submission.
GET COVER THAT FOLLOWS THE JOB TO SITE
WITH INSTALLATION & ERECTION INSURANCE
Insure24 helps engineering businesses place insurance built for on-site risk — contract works, site liability, plant and tools, transit, and contract-driven exposures. If you want a programme that matches how you actually work, we can help.
WHAT WE HELP YOU PROTECT
- Contract works and materials on site
- Site liability for damage and injury
- Tools, plant and hired-in equipment
- Transit to and from site
- Commissioning and advice exposures (where relevant)
WHY INSURE24
- Engineering-aware broking and insurer presentation
- Joined-up cover: liability + works + plant + transit + PI
- Support with contract requirements and endorsements
- Fast access to leading UK commercial markets
- Ongoing help as your work mix changes