Risk areas

Risk areas

Moisture monitoring of risk areas during construction

Moisture monitoring of building materials

Storage of building materials during construction:

  • Should ensure that materials are kept dry at construction site or are allowed to dry out before being used in construction.

Construction completion:

  • Should be done when the materials are dry enough or that the drying takes place as expected after closing.

Moisture monitoring of risk areas during maintenance

Moisture monitoring of roof

Sedum roof

  • Has increased weight and absorbs moisture compared to other roof solutions where the water runs off.
  • It is necessary to check that this moisture does not travel to the outside into the load-bearing part of the roof structure (battens and rafters).

Naturally ventilated frost-free roof

  • If the roof is not heated, the need for proper ventilation is more important and especially critical during periods of winter. Monitoring should be carried out as part of maintenance.


  • It should be ensured that cavities are properly ventilated.
  • The humidity will vary naturally on the roof, depending on the year. However, in conjunction with the right temperature, this can lead to conditions of mold growth if not properly ventilated.

The north-facing side of the roof

  • There is an increased risk due to less heating compared to the south.

Roof plywood in roof cassettes

  • Certain moisture conditions can lead to mold growth in the thin plywood.

Wooden base

  • For roofing felt in roofs with vario vapor barrier / hygrodiode in exposed areas.

Roof constructions after renovation

  • As well as the utilization of old roof spaces, where existing wooden constructions are more or less enclosed. Any form of containment increases the risk of moisture damage due to reduced ventilation. The ventilation of the roof is crucial for a healthy roof structure.

Moisture measurement of basement

Between cast concrete and wooden wall

  • The moisture separated from the concrete during its natural drying, can be absorbed by the wall elements and create a number of moisture damages such as cracks, deformations, mold growth, etc.


  • If timber is used as part of the foundation, it must be secured against air and in areas with a risk of water exposure.

Bottom plate

  • Close to the ground where ground-water and rain can create issues with rot.

Light ground slabs in modular construction

  • Placed close to ground.

Moisture measurement af facade

Facade cladding

  • If timber is used close to the ground, there is an increased risk of the material coming into contact with dirt and water, which can lead to rotting of the wooden material.
  • Water + soil + air = optimal conditions for rot issues. For this reason, wooden beams tend to snap right in the transition from ground to surface.

Ventilation column

  • With a lack of proper ventilation, there is a risk of moisture damage from the outer wall to the load-bearing posts or elements, if moisture accumulation happens.

Behind vestibule

  • Exposed to extreme changes in temperature.

North-facing facade

  • Drying is not as efficient as on southern-facing facades and condensations occur more frequently.

Walls and girder

  • Light constructions under renovation may be particularly exposed to moisture from existing heavy constructions.

Moisture measurement at floor separations

Between floors

  • E.g. where concrete is cast and placed in close proximity to wooden elements.


  • Between timer and steel, or from concrete floor to wooden walls.

Moisture measurement of the general construction


  • Where different building materials interact, e.g. steel and timber.

Technical rooms

  • Particularly warm conditions.

Windows and doors

  • Corners and tenon dowel joints have an increased risk of fungi attacks due to a higher level of moisture compared to the equilibrium moisture level.


  • Increased impact on humidity.

Moisture measurement of penetrants

Bathrooms and wet rooms

  • Specifik piping of installations.

Light floors

  • Often plywood in wet rooms around floor drain.


  • The water can run out into the construction, if not properly sealed around the floor drain. If construction is timber-based, it will absorb the water, which can lead to cracks, irregularities, and even rot.

Ventilation pipes

  • Condens is created from the difference in the temperatures within the pipes as opposed to temperature in the surrounding area.


  • Same as ventilation pipes.

Moisture measurement of special materials

Cork walls

  • As there is less knowledge about the properties of the material, it should be monitored.

Impregnated wood

  • Difficulties in measuring increases the uncertainty as to how much moisture is in the impregnated timber.