Roof
CLT flat roof
1 sensor every 10 to 25 m2 (depending on risk level of roof & value of interior). The sensor can be installed from below with insulated pins measuring in the top panel of the CLT.
- Water ingress make the top panel wet, which has led to many CLT roofs rotting and losing their structural function.
- One small defect can lead to lasting damages.
Prefabricated timber roof cassettes
1 sensor per element.
- Can detect built in moisture during installation, can lead to mould growth.
- 1 small hole or unsealed part in the top membrane destroys the cassette.
- Green roof or solar panels increases risk and cost of damages.
Timber frame roof
Sensors in risk areas around dormers, chimney, ridges, etc.
- Can detect ventilation thatisn’t done properly, leading to long term excessive moisture levels, which leads to mould growth.
- Leakages and condensation around penetrations.
Facades
CLT walls
1 sensor every 40 m2 on average. Varies a lot based on risk profile of the building. Place sensors under windows or close to the foundation.
- Walls are exposed to rain during construction and contractor needs to ensure right moisture levels at closure. A resource heavy manual task.
- Walls get moisture from foundation, leakages from the roof or penetrations that aren’t sealed correctly (windows, ventilation, etc.)
Prefabricated timber facades
1 sensor every 4 elements in critical areas (top corners and bottom close to the foundation and in the corners)
- Elements get water ingress during construction due to excess water from roof, open membranes during installation, etc.
- Elements get excess water from surrounding construction (roof, balconies, high pressure in altitude, etc)
Timber frame walls
Sensors in risk areas
- Walls get moisture from foundation, leakages from the roof or penetrations that aren’t sealed correctly (windows, ventilation, etc.)
Slabs
CLT slab
1 sensor every 50 sqm during construction.
- Slabs are exposed to rain during construction and contractor needs to ensure right moisture levels at closure. A resource heavy manual task.
- Slabs can get trapped moisture due to in-situ concrete or closure at high moisture levels.