How to dehumidify a basement

How to Dehumidify a Basement

29th Oct 2018 | |

We are getting numerous calls at the moment about wet cellars following recent rains.  Many of these are un-modernised coal-cellar spaces within Victorian terraced houses.  Our tips for drying these would be as follows:

  • Install our compact industrial dehumidifier or the large industrial dehumidifier – both are perfect for use as basement dehumidifiers;
  • To boost the evaporation rate and ensure the length of the cellar is dried, consider installing 1 or 2 industrial fans;
  • Close off any ventilation to the outside, such as temporarily blocking air bricks to the front and rear. This will create more of a closed-air environment for the dehumidifier to recycle the same air;
  • Particularly if it’s cold, install a portable heater in order lift the temperature in the room to at least 20 celcius, to help the dehumidifier operate more efficiently. The dehumidifier itself produces warmth as a by-product of operating, however other heating methods would help in addition to this;
  • Run the equipment for at least 2 weeks in order to shift the excess water close to the surface of the brick walls and concrete floors. While these materials are unlikely to dry fully within this time, the cellar is likely to return to its normal equilibrium, after which natural ventilation (via air bricks) will displace excess humidity.
  • For residential or commercial basements that have been converted to useable accommodation, other steps may need to be considered, in order to prepare the space for drying:
    • Wet plasterboard walls may need to be cut away, in order to remove materials that may be affected by mould, also this will allow dry air to circulate over the structural material behind;
    • Floor coverings such as carpet or laminate flooring would ideally be removed, if affected by flood water, in order to facilitate drying of the concrete floor structure below.

For any advice on basement dehumidifiers for your home or commercial property, please contact us on 020 7760 7660 or