Why pressure drying is the most effective method

  • Pressure drying and dehumidification of layered constructions

    There are shared opinions on pressure drying as a choice of drying method when drying water damages, especially in living environments. At Corroventa, we consider pressure drying to be the fastest and most effective method. Why?

    We can start by saynig that pressure drying means that you create a pressure and press the hot and dry air in the construction. This can sometimes result in some particles from the humid air reaching the living environment. Is there something you can do to prevent this from happening?

    We recommend:
    When possible – use plastic enclosuring to limit the area and thereby also making the drying process more effective.

    Questions to answer before starting the pressure drying process:

    • Have we eliminated all the free water in the room?
    • How large is the surface that we will dry? For a surface of up to 45 m2, an adsorption dehumidifier A2 ES together with a turbine T2 ES is enough. If the surface is up to 75-80 m2 you will need an A4 ES in combination with a T4 ES. If you are drying several rooms, you need to make sure that there is air flow in each room.
    • The hot and dry air can affect wooden material in the room. Therefore, it is important to remove or wrap wooden furnitures and decorations.


    We would like to emphasize the importance of always starting the drying process with suction drying to make sure that you eliminate all the free water in the room.


    When is pressure drying the best option?

    • Layered constructions
    • Floating floors on a concrete plate where water has leaked in the filling or isolation

    This is what you need to pressure dry: 

    • Drill holes in the floor to be able to get hoses with the dry air in the construction. You might need to drill up to one hole per 2 m2. The most important is to make sure that there is an airflow of 0,5-3 m/s everywhere. The optimal air flow is 1-2 m/s. This is to ensure flow and to keep as much heat as possible in the material.
    • A hose system to spread the dry air in the construction. We recommend Corroventa’s hose system C16.
    • Adsorption dehumidifier A2 ES or A4 ES
    • Turbine T2 ES or T4 ES
    • Plastic for any plastic enclosuring. Read more about plastic enclosuring.
    • We recommend you to use Corroventa’s ES-machines together with the control system SuperVision® to be able to remotely control the drying process.

    Why use a turbine from the ES-family? 

    The ES-machines have a built-in feature to prevent the machine from being over-heated. The machines also have many opertion and control modes that will optimize each drying process. Turbine T4 collaborates with all other ES-machines and is prepared so that they can be monitored and controlled remotely with SuperVision®

    The illustration below shows the pressure drying principle

    trycktorkning metod för torkning av vattenskadaThe technique is based on the dried air being led into a turbine, which raises the temperature and pressure of the air. The dry and very warm air is then forced down into the building construction via a hose system, which is connected to holes that are drilled in the construction. The warm, dry air is forced through the wet construction, where the heat increases the vapour pressure in the damp material several times over and, in this way, increases the drying rate. The damp air is returned to the room via natural openings, or holes drilled in the construction, where it is once again sucked into the dehumidifier and dried anew before it is forced back into the building construction.