Protect your timber structures with real-time moisture monitoring

Tector’s smart wood sensors give you full visibility into what’s happening inside your timber structure from roof to wall, frame to facade.

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Sophie radich school in Norway during construction
Trusted by industry leaders

Ensure the longevity, safety, and sustainability of your building

Moisture is one of the biggest threats to timber buildings. If left unnoticed, it can lead to rot, mould, or even structural failure — putting your reputation, schedule, and bottom line at risk.

Tector helps you catch issues early by measuring safe moisture levels in walls and roofs. Our wireless moisture system keeps track of key risk zones so you can act before damage sets in.

Whether you’re working with CLT, timber frame, or prefabricated elements, we give you the confidence that your structure stays dry, healthy, and fit for the future.

Quote Lars COWI: “In larger timber constructions, I would clearly recommend a QA with built-in sensors. 

It creates a safety for both the developer and the construction firm that the documentation is in order.”
a close up of a piece of wood with a Tector moisture detection sensor

How the moisture detection system for timber work?

Tector combines smart sensors with cloud-based software for effortless tracking of moisture and humidity.

Here’s how it works:

  • Sensors measure moisture deep inside the wood, including areas most at risk of ingress
  • Data is transmitted wirelessly to your phone or desktop — no climbing, guessing, or waiting
  • You get real-time alerts when readings exceed safe levels
  • All data is logged and accessible for reports, documentation, or audits

The result? Faster decisions, fewer risks, and more durable timber structures.

Quick and easy installation

Designed for efficiency on site, Tector sensors are:

  • Installed directly into timber elements in just a few seconds
  • Tool-free — no wiring or drilling required
  • Lightweight and discreet, with no need for external boxes or gateways
  • Ready to go without specialist teams or training

Once placed, your wood sensor network begins collecting real-time moisture data and keeps going for up to 10 years with no maintenance needed.

moisture sensor installation quick and easy
Data report for wood moisture, temperature and humidity by Tector ex woodsense

One and only moisture measurement device

    • Our system delivers serious performance in a simple package:
      • Always on – Continuous 24/7 moisture and humidity monitoring
      • Long lifespan – Up to 10 years of data from a single install
      • Custom alerts – Stay informed with real-time notifications tailored to your project’s conditions
      • Automatic reports – Download inspection-ready documents with just one click
      • Reliable connectivity – Wireless transmission across large construction sites or occupied buildings
      • Cloud access – All readings available remotely, anytime
    • It’s a smarter way to monitor what matters — without interrupting your workflow.

Benefits of wood sensors

    1. 1. Enhance durability
      By tracking moisture over time, Tector helps you spot trends, catch problems early, and make sure your timber structure stays dry and dependable.
    2. 2. Reduce costs
      Moisture damage during or after construction can cost tens of thousands. Our moisture system helps you avoid those losses with early, accurate data.
    3. 3. Lower risk
      Real-time data supports better decisions — whether it’s delaying a closing, resealing a roof, or checking hidden cavities. That means fewer surprises and stronger outcomes for everyone involved.
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a close up of a wooden floor with a wooden slatted wall and Tector moisture detection sensor

Typical placement of

wood sensors

Get an expert consultation, and follow our guidelines to determin where to place and mount sensors, and at what density.

For CLT flat roofs, we recommend installing 1 sensor per 10 to 25 m², depending on the roof's risk level and the value of the interior.

The sensor is easily installed from below, with insulated pins measuring moisture in the top panel of the CLT.

Water ingress often affects this top panel, which can lead to rot and compromise the roof's structural integrity.

wood sensor on clt flat roof

Each prefabricated timber roof cassette requires 1 sensor to monitor moisture, especially during installation.

Built-in moisture can lead to mould growth, and even a small hole or unsealed area in the top membrane can damage the entire cassette.

Roofs with green or solar panels increase the risk of moisture-related problems and the cost of repairs.

person installing wood sensor on timber in factory

For prefabricated facades, one sensor is required every four elements in critical areas, such as top and bottom corners near the foundation.

Water ingress often occurs during construction from roof runoff or when membranes remain open. External factors like balconies or high-altitude pressure also contribute to moisture risks.

prefabricated timber frames in roof with wood sensors

For timber frame roofs, sensors should be placed in risk-prone areas such as around dormers, chimneys, and ridges.

They can detect poor ventilation, which can lead to excessive moisture build-up over time and result in mould growth.

Leakages or condensation around penetrations can also be caught early, preventing long-term damage to the structure.

karsneskolli roof with timber and wood sensors

Sensors should be placed in high-risk areas where moisture can enter, such as from the foundation or roof leaks.

Poorly sealed penetrations, like windows and ventilation, can lead to moisture build-up.

wood sensor installed on timber frame wall

On average, one sensor is needed for every 40 m², with placement varying based on the building’s risk profile.

Sensors are installed under windows or near the foundation, ensuring critical areas are covered.

During construction, walls are exposed to rain, and manual moisture checks can be time-consuming.

Moisture also enters through the foundation, roof leaks, or improperly sealed penetrations such as windows or ventilation points.

wood sensors in snow on a timber wall

One sensor is recommended every 50 m² during construction.


Slabs are particularly vulnerable to rain exposure, requiring careful monitoring to ensure moisture levels remain under control. Trapped moisture from in-situ concrete or improper closure during high moisture levels is a common issue.

wood sensor installed on a CLT slab
Marmormolen timber construction

Sustainable timber construction

      1. Tector's technology promotes environmentally responsible practices, aligning with global sustainability goals and regulatory requirements, and adds value for DGNB, LEED, Eco label and BREEAM certifications.
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Monitoring Moisture in the Faroe Islands’ First CLT Building

By using Tector's sensors, we eliminated the need for random sampling, as the sensors provided continuous, accurate data. This allowed us to streamline quality assurance and make informed decisions on-site.
Gudmund Nielsen
Project Manager
Read case

What’s the best moisture monitoring solution today?

Obviously, it’s us. Our solutions are incredibly accurate and have already saved our clients billions.
No one else comes close.