Solutions for Quality Assurance during Construction and Long-Term Monitoring for Heavy Timber Structures

SMT has been involved in monitoring some of the most influential mass timber projects in the world.
Our solutions enable design and construction professionals to get the best performance out of their timber of choice.


Our unique sensors and electronics allow the collection of performance data from critical components, including real-time conditions during construction. 


Data recorded during transportation, construction, and during the life of the structure validates significant decisions in design, sequencing, and quality of work.

Contact SMT to see how we can assist with your project, or continue scrolling for more information...

Roof Integrity Monitoring

Mass Timber buildings have a unique risk of it's structural integrity being compromised from moisture intrusion. Unlike steel or concrete buildings, Mass Timber structures act like a large sponge when met with excessive water and can absorb moisture into the wood assembly, putting it at risk for structure failures.
The roof is the first defence against moisture, but there is an increased risk of moisture accumulation due to either errors and damage in the installation of the roof assembly, or through moisture that has been allowed to collect in hidden areas. 

To verify the conditions of your roof on a mass timber project, SMT offers Leak Detection Services. 

For long term monitoring of the structure, SMT offers three solutions. 

1. FutureCast Leak Detection System: A permanent network of sensors applied directly onto the wet or dry side of the waterproof membrane (depending on type of assembly) to actively monitor the integrity of the waterproofing. 

2. Roof Deck Moisture Monitoring: Moisture sensors are installed directly into the structural element of the roof - either from above or below depending on project specific factors. Allows tracking of moisture content trends over time, as well as efforts to dry out the assembly in the event of a leak.

3. Targeted Structural Monitoring: Using an array of sensors as required by the design of the structure, SMT installs monitoring equipment at the most structurally important locations to monitor for the long term health of the structure and safety of it's inhabitants. 


In order for a project to be completed smoothly, it's important for Mass Timber construction that the materials arrive on site unharmed. SMT's monitors timber materials during transportation by installing sensors enabled via cellular based data acquisition to monitor for moisture, temperature and relative humidity. 


Temperature sensors with various depths

Moisture sensors with various depths



The moisture content of wood components are affected by external environmental conditions, including rain, wind, heat and variable temperatures. Moisture is also affected by internal sources generated during construction, and occupant generated moisture. Moisture can collect in hidden areas and can cause damage on critical structural elements. 

SMT moisture sensors can be embedded in structurally significant sections of laminated timber, with several probes at different depths to build up a moisture content profile of the section. This can be used to validate design decisions, track drying out progress, and protect against the negative impacts of hidden moisture - such as mold, rot, and decay of the timber elements.

Cross section of CLT with various depths of moisture probes.
Thermal Efficiency

The ability to monitor thermal efficiency is vital to verify decisions made in the design stage. SMT sensors have been used for the comparison of wood fibre insulation to conventional insulation both during the initial construction period and throughout seasonal environmental changes.


Individual components have published R‐values making it possible to calculate the theoretical R‐value for a specific assembly.


Considering other variables at play, such as type of fasteners used, variability in construction as well as environmental factors, measuring the in‐situ effective R‐Value is critical in determining the actual thermal efficiency of a wall system.


Our approach to monitoring R-value will differ by project. As an example, in one particular project SMT used a comparison of wood fiber insulation to conventional insulation and monitored over the initial construction period as well as during the seasonal environmental changes.

Structural Displacement

While Mass Timber offers multiple unique benefits to a construction team, it also poses some unique challenges - specifically the variability of wood with respect to shrinkage resulting from moisture and other unforeseen conditions.


SMT produces a number of movement sensors to aid in measuring structural displacement - giving owners and project managers confidence that movement within their timber structure is within acceptable limits.



No two structures are the same, even if they are designed that way! SMT's sensor suite is adaptable to site conditions and requirements, for example on one Mass Timber project we were tasked with monitoring attachment methods of  Steel Composite Truss to a DLT wall. We utilised a tri‐axial structural displacement monitoring method shown opposite.

Data Visualization

Unity Virtual Tour: Let's walk through SMT sensors inside the UBC Tallwood House.

At SMT, we are constantly pushing forwards with how we visualize data - making it easier to digest and therefore more useful.


In combination with BIM technology, we utilized the Unity Game Engine to create a virtual tour of the UBC Tallwood Building, allowing users to explore the building and inspect live sensor data.

The user has the flexibility to view the building's exterior from any direction, while individual sensors can be selected to view historical data trends. 

As digital twin technology continues to disrupt the construction industry, SMT is leading the way with innovative ways to interact with and know more about your structures. 

Download the Virtual Tour Application:

Using Unity Gaming Engine, users are able to virtually tour the building and inspect live sensor data.

The building exterior can be viewed from any direction.

Select sensors to view historical data trends.


Want to learn more about Mass Timber Monitoring?
Download one of our handy overview documents or Contact SMT to talk to our technical consultants.

Mass Timber

A+E Spec

Previous Projects

UBC Brock Commons Tallwood House

Wood Innovation and Design Centre (WIDC)

Mountain Equipment Co-op (MEC) Head Office

©SMT Research

18 stories, 160,000 Sq. Ft.
CLT Vertical movement and roof moisture performance monitoring.

©Emma Peter

©Ed White

6 stories, 52,000 Sq. Ft.
CLT Vertical movement and roof moisture performance monitoring.

4 stories, 112,000 Sq. Ft.
Green Roof leak detection and NLT moisture monitoring during construction.

Let's talk about your next project.