Warmwall are experts in dealing with condensation and have the following condensation solutions to help you.
When formed on the room side surface of the inner glass:
- Provide natural ventilation through an opening section of the window, or through a proprietary ventilating unit, or through an airbrick.
- Where there is no open fire, or where existing flues have been blocked off (and cannot be unblocked) ensure that wall vents are fitted and kept clear.
- Open at least one window in each room for some part of the day to permit a change of air.
- Eansure ventilation of all rooms where gas or oil heaters are used.
- Fix hoods over cookers and other equipment producing steam, and ventilate them to the outside air.
- Ensure that bathrooms and kitchens are ventilated in accordance with National Standards.
- Draught proof internal doors and keep them closed to prevent transfer of air with a high water vapour content from the main moisture producing rooms – kitchens, bathrooms and drying rooms. It should be borne in mind that water vapour does not remain in the room where it is first generated, but tends to migrate all over the house because:
- The water vapour pressure in the original room may be higher than elsewhere, and so the moist air will be forced out into rooms with a lower pressure and,
- Convection currents will carry it through the house.
- Increase slightly the air temperature within the house.
- In cold weather keep some form of heating on permanently in the house.
- Wherever practical, fix radiators under windows to maintain the temperature of the inner glass at a reasonable level
- Condensation can be caused by isolating the inner glass from the warm room air with heavy curtains when drawn. To allow free passage of warm air to the glass, position curtains 15cm to 20cm away from the window, and ensure there are significant gaps along the top and bottom to permit continuous circulation. Condensation will not form on the inside of a correctly functioning sealed unit. For secondary sash systems this phenomenon could occur.
When formed on the cavity side surface of the outer glass
- Make the seal of the secondary frame, and the sealing of the secondary glass to this frame, as near airtight as possible. Particular attention should be paid to all joints.
- Drill breather holes though the primary frame to connect the air cavity to the drier air outside the home. Holes should have a diameter of 10mm. If the frame is made of wood it is better to drill a hole large enough to accommodate a metal tube of 10mm internal diameter. Two holes about 50cm apart should be sufficient for windows up to 1m wide; more should be drilled for larger windows. A simple filler, such as glass wool, should be inserted to exclude dirt and insects.
When formed in the cavity when the sun shines
- Romove the secondary glass pane.
- Remove and discard any desiccant.
- Drill holes to connect the cavity to the outside as explained above.
- Dry out the frame area. Care must be taken not to apply concentraed heat close to the original glass.
- Seal up any holes or cracks with compound or wood filler.
- Seal completely all wooden surfaces in the cavity with a proprietary wood sealer.
- Replace the secondary pane, taking care to make the seal and all joints as near airtight as possible.