Occasionally you may get condensation forming on the external pane of glass. This is usually visible on cold, clear mornings.
This occurs because modern glass systems are now so efficient at keeping the heat inside the room that the warmth is not able to transfer to the outside pane to heat it up. Look out the window at your car and I bet that’s wet through too.
This is not a product fault and as the daytime temperature rises the external condensation will disappear.
For more details customers can refer to page 6 of their Owner’s Maintenance Guide from Network Veka, which comes with your guarantee and building certificate.