Pressure drying

Pressure drying is one of the most effective and fastest commercially available methods for drying layered structures. Pressure drying can be used to advantage for drying floors on concrete slabs, where the water has leaked down into the fill or insulation under the floating floor. Corroventa has a number of products that are used for drying layered constructions such as walls, ceilings and floating floors. From flexible system solutions with dehumidifiers and turbines to the patented Combi series that offers the possibility of both pressure and suction drying in the same machine. The 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. The drying time can be reduced significantly by protecting the drying process from exposure to damp air coming from the surroundings. This can be done quite simply by closing valves and sealing other openings into the room where the drying process is underway. However, wherever possible the plastic enclosure method should be used.

The great advantage of creating a closed system is that a very limited quantity of air is dried and heated and the dehumidification is then concentrated on the water damage in the construction. In this way, a very quick and energy-efficient drying process is obtained.