Frequently asked questions

Here we have gathered the information our customers most often request


Dew on the outside of the glass may occur on new windows with a low u-value (good insulation). This can occur on windows with both 2- and 3-layer glass. Dew occurs when the outer glass cools at night and there is high humidity, usually in the autumn and winter months. If the window has little opportunity to radiate freely towards the sky, the risk of external dew will be reduced. Shielding can, for example, be roof projections, awnings, overlying balconies, surrounding vegetation, buildings, etc. If the windows are retracted and not at the outer edge of the wall, it will also act as a shielding and reduce the risk of condensation.



The window panes are usually the coolest point in a room and often the conditions can be such that condensation forms on them. The cause of this problem is usually found in the indoor climate of the home. Dew formation can be remedied by low room humidity, good ventilation and regular ventilation. This is important in rooms where there are many people and/or plants, as well as where cooking and washing take place. In cold periods, it is important to have rising hot air inside the glass in the form of a heat source under the glass. Without a heat source under the window, the air will fall down along the window surface, contributing to the cooling of the glass and the air near the glass. This creates ideal conditions for condensation. You can also choose a window where a spacer strip of composite material has been used instead of aluminum or steel between the panes.



If this problem occurs, it is due to a leak in the seal around the glasses and the pane must be replaced. If this occurs during the warranty period, there is a complaint.



The U-value says something about how well insulated the window is. The lower the u-value, the better insulated the window is.

Glued-on bars are bars in aluminum that are glued to the glass on the outside and possibly on the inside. Consistent bars are what many call the "old-fashioned" bars. The bars go through the glass, so here the glass is divided into squares by the bars. These bars provide a stronger division of the window surface, and are built into the window when it is produced.

In some cases, glue residue or a "film" may remain on the labels on the glass itself. Experiment with soapy water mixed with eg zalo or salmiak. Citrus spray is also an option that removes glue residue.