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Dehumidification in case of water damage

Entfeuchtung Wasserschaeden

During the last few years, non-life insurers in Germany have had to register an enormous rise in damage claims in water damage insurance. According to information of vds, approx. 1.5 million cases of damage are reported every year. In very many buildings, water-bearing lines are in need of remediation. On account of changed living patterns, more air-tight construction and increased hygiene requirements, moisture damage as a cause for mould infestation has become the focus for increased moisture damage during the last few years. Heavy storms and evermore heavy rainfalls do the rest in order to create a wide field of action for water damage remediators.

Before starting
Before technical drying of water and moisture damage, it is definitely necessary in any case that the cause of damage is known and removed at the beginning of the work! If this is not the case, the leakage detection is carried out first of all as a rule using leak detectors, such as LSK 200 complete set, for example, and subsequently the repair is carried out at the damaged area. Acute damages requires especially quick reaction times. In these cases, an immediate measure should be carried out within two to three hours.

Off we go
If no insulating layers or hollow spaces are concerned, simple room drying with condensation dryer, such as HEYLO KT 1800, remains to be carried out as a rule. Where necessary, wall drying has to be carried out by using foil tents or so-called infrared heat panels. In most cases, however, hollow spaces are involved as well so that shafts, wood-beam ceilings, flat roof insulations or floor fill insulation layers, for example, have to be dried as well.

In case of screed drying, a differentiation is made between overpressure drying and the vacuum process. In both processes, adsorption driers and the suitable side channel blowers (SKV) are applied preferably. During overpressure drying, the excessively dried air is pressed into the insulating layer and escapes over the edge joints or through relief bores more or less uncontrolled (which is not advisable). In the vacuum process the escape can be controlled. The uniform perfusion at the open edge joint can be measured by means of an anemometer. In addition, suitable measures have to be taken that no water or solids get into the side channel blower, damaging the unit potentially. If free water is contained in the insulating layer, a water separator has to be installed in front of the blower in this process in general. Due to the potential turbulences of contaminants and spores, the vacuum process is used increasingly. Fundamentally, the subject of mould and/or artificial mineral fibres has to be given special attention in this context. It is not unusual that mould spores and artificial mineral fibres are spread within the complete building due to inexperienced “remediation work”. Thus, areas not contaminated originally are contaminated unnecessarily. Instead, the targeted use of air filter with HEPA filters and the suitable disinfectants would have been a further income opportunity for the craftsman.



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