The UK’s Joint Code of Practice for Escape of Water (JCoP) is reshaping construction risk management, and global contractors can’t afford to ignore it.
Water is the new fire. If you work in construction, you have likely heard that phrase before. Water damage has now overtaken fire as the leading cause of claims on construction sites.
The industry is beginning to respond, and the Joint Code of Practice (JCoP) for Escape of Water represents the UK’s latest measure to confront this escalating risk. JCoP now requires that water escape risks be handled with the same seriousness as fire hazards, applying to all projects with a value over £2.5 million.
While JCOP is a UK code, it signals a broader shift in insurer expectations and construction best practices globally. US developers, contractors, and insurers often track these UK standards because they influence underwriting criteria, risk models, and even project insurance terms internationally. The drivers behind JCOP, including rising claim costs, tighter insurance markets, and the need for proven water mitigation, are the same pressures already affecting US projects. In short, what starts as a UK standard often becomes a global norm.
In a recent Wint webinar, Yaron Dycian, Chief Product and Strategy Officer at Wint, and Scott Middlebrook, Chief Electrical Engineer at Mace Group, one of the largest construction firms in the UK, explored the urgency of the issue, JCOP’s impact on site responsibilities, and the strategies required to stay ahead.
Below is a summary of our key insights and their implications.
Want to dive deeper? Watch the full conversation here.
Water Damage: Construction’s Biggest and Costliest Threat
Water damage has overtaken fire as the leading cause of insurance claims on construction sites. Forty-two percent of UK building insurance claims now originate from construction-related water damage — surpassing fire and theft combined.
The impact is brutal:
- #1 cause of building insurance claims
- Builder’s risk deductibles up to £1M per incident
- Claims rising 15% year-over-year
- Tougher insurer terms, higher premiums, reduced coverage
For many contractors, a single leak can wipe out the profit margin on an entire project. And it’s not just an insurance problem, it’s a profitability, schedule, and brand problem. Leaks mean delayed handovers, damaged materials, wasted resources, and eroded stakeholder trust.
Enter JCoP: Structured Standards for a Real Solution
Developed with input from insurers, MEP experts, and organizations like the Chartered Institution of Building Services Engineers (CIBSE) and the Chartered Institute of Plumbing and Heating Engineering, JCoP sets out clear, formal requirements for any UK construction project over £2.5 million in value.
JCoP is already being embedded into construction contracts and insurer requirements. The goal is simple: eliminate escape of water at the source.
Key requirements include:
- A Water Systems Management Plan (WSMP) covering all stages of the project, from design through post-handover.
- Designation of a Water Responsible Person (WRP) on every project.
- A Water Emergency Response Plan (WERP) including named team members and pre-agreed protocols.
- Active Flow Monitoring Systems (AFMS)—automated, AI-driven technology to detect and shut off leaks in real time.
JCoP covers all systems — not just domestic water, but closed HVAC loops, temporary water, and sprinkler systems (alert-only).
While not yet law, JCoP is already influencing insurance underwriting and contractual requirements. More developers and general contractors are being asked to demonstrate compliance with JCoP guidelines to receive coverage, and those who don’t face higher premiums or flat-out exclusions.
“You’ll see acronyms like WSMP, WRP, WERP, and AFMS—this isn’t bureaucracy, it’s accountability,” said Yaron Dycian, Chief Product and Strategy Officer at Wint. “It’s being required—first by insurers, now by contractors, and soon, industry-wide.”
Why the US and Global Markets Should Pay Attention
JCoP isn’t only for UK builders. It’s a signal of where insurer expectations are heading. In the US and beyond, similar pressures are already mounting: higher claims, shrinking coverage, and stricter underwriting. What becomes standard in the UK often becomes the global norm.
JCoP Implementation Best Practices from Mace
The Joint Code of Practice is only as effective as its execution on site. As Scott Middlebrook of Mace Group emphasized, compliance begins before the first pipe is laid and must remain active throughout the project lifecycle.
Below are some implementation best practices:
1. Integrate Water Risk Planning from the Design Stage
Begin developing the Water Systems Management Plan (WSMP) during preconstruction, not after work has started.
- Identify all water systems that require monitoring — including domestic water, HVAC loops, temporary water, and sprinklers (alert-only).
- Determine optimal valve placement, isolation points, and monitoring technology requirements before procurement.
- Align on operational needs and sustainability goals, reducing costly change orders.
2. Assign Dedicated Roles and Accountability
Designate a Water Responsible Person (WRP) and a deputy for each project to maintain continuity during absences.
- The WRP oversees the WSMP and the Water Emergency Response Plan (WERP), liaises with subcontractors, and ensures QA/QC on all water-related installations.
- Maintain an up-to-date emergency contact list for the Water Response Team, including after-hours coverage (e.g., security, logistics).
As Scott Middlebrook explains: “The Project Director will appoint the Water Responsible Persons for the project. At Mace we have a lead and we have a deputy, because people have holidays and we need to make sure we’ve got that cover.”
3. Keep Procedures Current and Visible
Water management procedures must evolve with the project.
- Update emergency flowcharts and valve location maps as site conditions change.
- Ensure subcontractors are briefed whenever protocols are revised.
- Post critical response instructions in strategic, accessible locations across the site.
4. Train, Test, and Audit Regularly
A plan is only effective if people know how to execute it.
- Conduct regular training for both contractor and subcontractor teams, including refresher sessions for new staff.
- Perform quarterly audits against JCoP requirements and project-specific risk controls.
- Run dry-run leak simulations to verify that emergency response times and procedures meet expectations.
Scott Middlebrook shares: “I have a habit of turning up to sites and just going to the top of the shop and saying, ‘We’ve got a leak,’ just to make sure the emergency response is in order and everybody knows what they’re doing.”
5. Maintain Direct Contractor Control of Water Management Plans
As the principal contractor, retain ownership of the WSMP and WERP.
- While subcontractors may have their own internal plans, these should align with and feed into the principal contractor’s strategy.
- Direct ownership ensures readiness for insurer audits and gives project leadership full visibility into risk controls.
By embedding these practices into every stage of the project, contractors can not only comply with JCoP but also reduce the risk of catastrophic water damage, protect project margins, and strengthen insurer relationships.
To learn more about how Mace implemented JCoP with Wint, check out the full webinar here.
Wint’s AFMS: Beyond Compliance to Real Protection
Wint is engineered not only to meet JCoP’s core technical requirements but to exceed them, delivering a solution that is both enterprise grade and insurance grade.
- AI-Powered Leak Detection – Wint’s patented pattern recognition technology goes beyond static thresholds, detecting anomalies early whether it’s a slow drip at 3 a.m. or a sudden burst during peak activity.
- Remote and Auto-shut off Control – Configure shutoff rules by zone, time, and use case, with the ability to shut off water remotely or automatically based on site-specific conditions.
- Full Building Coverage – Protects all water systems, from cold water mains to HVAC loops and temporary water supplies, ensuring no system is left unmonitored.
- 24/7 Expert Monitoring – Human oversight plus AI precision, so issues are caught even when sites are unmanned.
- Insurance-Backed Warranty – Wint is the only solution with an insurance-backed performance warranty. Supported by Munich Re’s HSB, Wint reduces water damage risk by more than 90% and offers a deductible cap at £10,000 for qualified projects.
- Proven Results Recognized by Insurers – Independent Munich Re data shows Wint-protected sites experience 73% fewer claims and 90% lower payouts, demonstrating measurable, insurable risk reduction.
Beyond technology, Wint partners with project teams to design and implement tailored water management and mitigation plans, ensuring lasting protection and compliance.
JCoP in Action: How Mace Uses Wint
Since adopting Wint in 2021, Mace has:
- Rolled out the system across 60+ projects
- Reported zero major water incidents
- Saved £250,000 in water bills and 1,300 tons of CO₂
- Tightened compliance, using real-time leak detection data for audits and risk reviews.
Middlebrook explained the impact with Wint:
“The benefits are clear: 85,000 cubic meters of water saved, worth about £250,000 in water bills, and a saving of 1,300 tons of carbon emissions.”
From Compliance to Competitive Advantage
JCoP marks a turning point in how the construction industry confronts water risk. What began as a UK initiative is fast becoming a global benchmark for insurer expectations, contractual obligations, and operational best practice.
Contractors who treat JCoP as a box-ticking exercise will miss the real opportunity: using structured water risk management to protect profitability, strengthen insurer relationships, and enhance project delivery. The Mace–Wint approach shows what’s possible when planning, technology, and accountability align from the earliest design stages through handover and beyond.
Water damage is no longer an occasional hazard, it is the industry’s most frequent and costly claim. Those who fail to adapt will face higher premiums, tighter terms, and shrinking margins. Those who lead will deliver projects that are safer, more sustainable, and more insurable.
The choice is clear: act now to embed proactive, tech-enabled water risk management into every project, or be left reacting to the next leak. With JCoP setting the pace, the future belongs to builders who can stop water loss before it starts.
Learn how Wint helps you exceed JCoP and eliminate water risk at www.wint.ai.
