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Fogging may occur on the inside (room side) of the glass. Common causes are:

• Excessive indoor humidity and poor ventilation (especially in new buildings).
• Low temperature indoors.
• Poorly insulated panel.

Interior fogging is not a sign of a defect in the pane:

• Ventilating rooms is important for removing excess moisture. A room can be ventilated without creating draughts or becoming cold.
  One way to do this is to open the window slightly or use the trickle vent if fitted. By opening windows or ventilating your home it may appear that you are losing some heat, but what you are doing is allowing warm moisture-laden air to escape and permitting cool dry air to enter your home.
  
• Provide natural ventilation through an opening section of the window, through a proprietary ventilating unit, or through an airbrick.
• Open at least one window in each room for some part of the day to permit a change of air.

Fogging may occur on the outside of the glass. Common causes are:

• The relative humidity of the location. The higher the humidity, the greater the risk of condensation/fogging.
• The U-value or insulation level of the panel. The better the panel is insulated, the less heat is applied to the outer pane. The surface is then cooler, increasing the risk of fogging on the outside
• The temperature inside the room.
• Blockage, i.e. heat from the panel cannot radiate freely into the sky.

Exterior fogging is not a sign of a defect in the pane.

This may be due to cold drafts

Cold drafts occur when air is cooled by a window. The cooled air is heavier than air in the rest of the room, so it sinks or "races" downward. The air is pushed across the floor by its own weight, giving the impression of a draft. There are three factors that affect drafts: the height, size and surface temperature of the window. The colder and higher the window, the faster the air will sink and the greater the "draft". NOTE! Underfloor heating will not prevent cold drafts by the window.

For better comfort and warmth, use NTech Passive or NTech 1.0 which produces far less cold drafts.

The spacer bar detail is a unique code used to identify products. For windows and glass doors, you’ll find the code on the glazing bar (the gap between the glass), typically on the sides or bottom of the pane. On HomeGuard doors, the information can be found on the door leaf. These codes contain all the necessary information for us to identify the unit and your original order.