What is condensation and methods of prevention

Lack of ventilation in a room leads inevitably to certain conditions of temperature and humidity, the condensation on insulating glass starting from the bottom of the glass.

Condensation occurs on a sheet of glass when indoor air is saturated with steam (created by specific household activities like cooking, showers, excess plants, freshly plastered rooms - painted, etc.), So humidity is high and the glass surface Interior is "cold" (radiators not working or not working enough)
Using Low-E insulating glass (thermal coefficient k = 1.4 W / m K) is required. Same conditions of -15 ° C to 20 ° C outside and inside, the interior glass will be 14.7 ° C (9 ° C compared to normal glass), and condensation will occur at a relative humidity above 70 %.

Factors that cause condensation:

  • Very low outside temperature and inside temperature low enough;
  • Poor air circulation;
  • Lack of proper insulation of exterior walls;
  • Existing steam generating sources: dry plaster or painting, drying clothes on radiators, bathroom, water, as excess plant, preparation of daily meals;
  • Breathing of additional quantities of moisture vapor to cause an increase proportional to the number of persons in the room;
  • Lot of natural plants, improper siting of renewable heating and window sills, air flow obstruction by curtains or blinds are other factors contributing to condensation;
  • Thick curtains in front windows favors condensation;
  • Sills who cover radiators, favor condensation.

  • How can be eliminated condensation?

  • Proper insulation of exterior walls and elimination of cold points;
  • Keeping constant temperature in the room;
  • Ventilate the room vigorously several times a day;
  • Do not cover radiators and remove the curtains as often;
  • Use washable lime permeable;
  • Using the outside window sills to prevent water infiltration;
  • Eliminate sources of accidental water (infiltration);
  • Eliminate possible sources of water (flower pots, laundry to dry, flower pots, etc.).
  • Using package LOW-E insulating glass + argon and fittings with double opening;
  • Assembly to start by mid-bulkhead window inwards.