The project in five facts.
Challenge, approach and results.
Inappropriate indoor climate, i.e. excessively high or low long-term relative air humidity, causes deformations in installed wooden floor coverings.
Solution and method
Inappropriate indoor climate, i.e. excessively high or low long-term relative air humidity, causes deformations in installed wooden floor coverings. They occur due to swelling of wood – at excessively high humidity, or due to shrinkage of wood – at excessively low humidity. Excessive moisture causes "tensioning" of wooden floor coverings, ultimately leading to detachment from the substrate and final destruction, whilst insufficient moisture causes gaps, and at extremely low humidity also detachment from the substrate.
The condition for stable, aesthetically high-quality and long-lasting installed wooden floor coverings is primarily ensured constant and appropriate climate, i.e. normal residential living temperature, and even more importantly constant relative air humidity within the range of 50% to 60%. Constant and appropriate climate can only be maintained through forced humidification and/or dehumidification. From the foregoing we recognise and understand the importance and influence of relative air humidity on the formation of deformations in installed wooden floor coverings.
To prevent the formation of deformations in wooden floor coverings, it is necessary to ensure constant and appropriate relative air humidity, immediately upon execution of works and continuously thereafter during operation. Appropriate conditions for execution of works are verified and often also ensured by the contractor. The contractor is obliged to provide or require appropriate climatic conditions throughout the execution of works, until final handover.
Only upon handover of completed works by the contractor or acceptance of works by the client or user does all responsibility and obligation for ensuring appropriate and constant climatic conditions transfer to the user. For all subsequently occurring defects in completed works, consequently due to failure to ensure appropriate climate, the user is therefore responsible. Claims against the contractor, for instance for gaps or swelling of wooden floor coverings, are therefore not justified retrospectively.
Constant climate in rooms can nowadays only be achieved through automatic forced drying or humidification. The previously mentioned technologically closed installation of wooden floor coverings (full adhesive bonding to substrate, surface lacquering) increasingly prevents ventilation possibilities or so-called natural ventilation. Already in the planning phase of individual projects it is therefore necessary to anticipate, mandatorily implement and continuously ensure appropriate and above all constant residential living climatic conditions throughout the use of spaces and wooden floor coverings.
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