Ensuring Longevity: Moisture Monitoring for Copenhagen’s School Roofs
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Moisture monitoring and leak detection for flat roofs
Tector’s wireless moisture sensors are installed permanently inside flat and low-slope roof assemblies and monitor continuously for water ingress and hidden moisture in the roof insulation.
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Organisations we work with
How do we detect moisture in flat roofs?
Tector’s system combines:
- Wireless Sensors: Installed beneath the roof felt and insulation but above the waterproofing membrane, our sensors monitor moisture levels continuously.
- Real-Time Data: Using AI, we provide 24/7 monitoring, ensuring you're always informed no matter where you are.
- Web-Based Application: Access real-time data and alerts through our intuitive platform, eliminating the need for manual checks.
This comprehensive approach offers a complete moisture detection system for flat roofs (low-slope roofs in North American terms), safeguarding your building from potential water ingress.
The sensors stay embedded in the roof build-up (the roof assembly) as permanent roof monitoring: they report continuously between inspections, without repeated invasive roof surveys, rather than measuring a single moment in time - see how Tector compares to moisture meters.
Specifying for a project? Read the flat-roof specification guide.
The Challenge
Constructing a flat roof often brings significant risks. On average, these risks account for 3.31% of total construction costs, and we’ve observed more than one instance of damage during construction across various projects. Alarmingly, over 50% of flat roof projects experience defects that lead to critical disruptions post-handover.
Common causes of these defects include:
- Workmanship issues: Poor quality work can result in vulnerabilities.
- Rushed construction: Lack of quality assurance can lead to oversights.
- Technical design flaws: Inadequate planning can compromise the roof's integrity.
- Material damage: Accidental breaches of the roof felt by subcontractors can cause serious problems.
Additionally, the risk of water ingress increases with features such as:
- Solar panels: These can add weight and create penetrations in the roof.
- Green/blue roofs and terraces: Additional layers complicate leak detection.
- Technical installations: Multiple penetrations can make sealing challenging.
The Solution
To mitigate these risks, install Tector moisture sensors every 15-25 m² in critical areas, depending on the roof's complexity. These sensors are placed beneath the roof felt and insulation but above the waterproofing membrane.
Installation is quick and easy, taking less than a minute per sensor and can be done by your team on-site.
This proactive approach is powered by our application's pattern-based Risk Score analysis for flat roofs, with alerts when the readings warrant them.
If the roof felt is compromised and moisture starts to penetrate the insulation layer, you know straight away - allowing you to address issues before they lead to costly repairs and damage to the underlying structure.
Benefits of flat roof moisture sensors
- Cost-effective Quality Assurance: Tector’s moisture sensors provide a cheaper and more efficient way to ensure continuous quality assurance on your roofs. With immediate detection, you can save up to 95% on repair costs compared to later detection, protecting your investments.
- Enhanced Collaboration: Our sensors promote transparency and focus on quality throughout your projects, reducing conflicts among stakeholders and ensuring everyone is aligned.
- Increased Insurability: Installing Tector sensors can improve insurability and save you up to 50% on excess costs related to water ingress, adding financial security to your projects.
- Spot-on Accuracy: Tector’s AI-powered wireless sensors deliver unmatched accuracy and reliability, ensuring you get precise moisture data.
- Long performance: Designed to last up to 25 years, Tector's moisture sensors require no replacements, allowing you to focus on your work without constant worry.
- Easy placement: Our sensors fit seamlessly into any space, ensuring comprehensive moisture monitoring.
- Saving money: Say goodbye to costly manual checks. Tector’s system saves you time and cuts labour costs.
- Real-time data: Get instant data on moisture levels so you can act fast and make smart decisions.
“The sensors and user-friendly application have been a valuable addition to our quality assurance and risk management processes”
Hlynur Júlíusson
Project manager, construction technology
Risk score
Tector’s Risk Score analyses key factors: moisture content, humidity, local rainfall and nearby sensors to generate a pattern-based risk index, indicating the likelihood of moisture issues in your roof.
By summarising complex data into an easy-to-understand risk level, Tector empowers you to manage moisture risks without needing deep technical expertise.
Prevent damage from water ingress
Get alerts when moisture levels are critical.
Track water movement in your building's blueprint.
See a timeline of water ingress and flow, so you can tackle issues before they escalate.
Stay ahead with real-time insights and proactive moisture management.
Build better
Protect yourself, your team, and your tenants with smart preventative measures.
Avoid costly delays and extra expenses by having a clear moisture management plan.
Build a stronger, longer-lasting building, whether it’s a hospital, school, or any other space.
What's your situation?
Start from your project, and go straight to the part of Tector that fits it.
- CLT or mass-timber construction
Construction-phase moisture monitoring for CLT and mass timber.
- Timber frame and prefabricated timber
Moisture monitoring for timber-frame and prefab construction.
- Occupied timber building
Long-term monitoring of timber buildings in use.
- Specifying for a project
Technical resources for architects, engineers and specifiers.
- A concrete project to scope
Request a project assessment with a recommended approach.
Tector in the UK
Tector monitors UK projects from Northgate House in Oxford to bio-based homes in England, working with the contractors and consultants below. Ben is our UK-based contact.
Frequently asked questions
How much area does one sensor cover?
A flat roof sensor covers roughly 20-25 m² of roof area depending on the roof complexity.
Where are the sensors placed in a flat roof?
In a warm flat-roof construction the sensor is placed on top of the vapour control layer (VCL), surrounded by the insulation.
Can sensors be retrofitted into an existing roof?
Yes, they can easily be retrofitted into an existing roof or building. In roofs this can be done by drilling a small hole through the roof membrane, placing the sensor in the insulation layer and sealing the hole.
How long do the sensors and batteries last?
The sensors are designed to last for 25 years.
What happens after I submit the form?
We strive to get back to you as quickly as possible, typically within one working day.
How is the system priced?
The system is priced per sensor and the price depends on the number of sensors needed for your project. Please contact us for a quote.
Measure moisture like it's 2026
Permanent wireless moisture monitoring for commercial flat and low-slope roofs.