1 - Adjust and Maintain your custom windows & doors

Did you know that your Bieber custom windows can be adjusted with a simple allen range ?
In fact our custom windows and custom doors are adjustable up, down, left, right, tighter to the frame or further from the frame.
Please contact us for more information about this topic.  

2 - Cleaning and care of Bieber custom windows and doors

Wood custom windows are modern building elements with an easy care surfaces that lasts. With a minimal effort you can maintain their high quality.
Only neutral cleaners should be used for regular cleaning of custom windows. Products that contain solvents, aggressive or abrasive substances can damage the surface.  

Bieber Wood Cleaner & Wood Care Balsam

gently but thoroughly cleans your custom windows and custom doors and add a fresh shine no matter whether they are finished with an opaque varnish or a colored stain.
They also provide additional protection against the influence of weather. Bieber Wood Care Balsam freshens the colour and makes surfaces shine.
Bieber Wood Cleaner and Bieber Wood Care Balsam are simply applied with a soft cloth. You don’t need a brush, sandpaper or anything else.
Please contact us to purchase the BIEBER WOOD CLEANER & WOOD CARE BALSAM

Regular use of the Bieber Care Products beautifies and extends the life of your custom windows!

 3 - Practical tips

• When cleaning the custom window panes, use plenty of water or window cleaner.
   
• "Dry cleaning" must be avoided, because using the cleaning implement with pressure can lead to mechanical "rub-off".
   
• Dirt on the weatherstrips, which can't be removed during normal custom window cleaning, shouldn't be removed by intensive, subsequent dry rubbing. In most cases, it can be easily wiped off using a cleaning or household spirit and a linen cloth.

The amount of moisture in the house

Breathing, cooking, doing the laundry, bathing, plants etc. create several litres of water per day:

Absorption of moisture by the air
Air can only absorb a certain amount of water in the form of water vapour depending on the temperature, e.g. 18 g/m3 at 20 C and only 9 g/m3 at 10 C. When the air cools, condensation forms.

Precipitation of moisture
When warm air laden with moisture (breathing, cooking, laundry, etc.) comes into contact with cold surfaces, condensation is formed. When the air cools from 10°C to 5°C, for example, 3g/m3 of condensation is produced.

Correct ventilation

Ventilation tips – is it necessary?
The answer is clear: Yes! Because well-sealed custom windows and high-quality insulating glass with a heat-insulating coating save energy and provide a comfortable living environment - and this increases the risk of mildew and spots of mould forming on the walls. That sounds paradoxical, but there's a simple reason for it, which we'll explain to you briefly.

Air humidity is relative
Just living normally in a house or apartment causes large amounts of moisture to build up, which must be absorbed by the air: For example, from cooking, doing the laundry, drying clothes, bathing, showering or washing the dishes. And the inhabitants themselves are sources of moisture: Every day, a healthy person releases about 0.5 litres of water into the atmosphere through the skin and even more than a litre by breathing!
The air can't absorb unlimited quantities of water vapour, however: At a "relative humidity" of 100 %, the air is saturated. This limit depends on the air temperature, however: At 0 °C, a cubic metre of air can absorb a maximum of 5 grams of water vapour; at 20 °C, this increases to 17 grams and at 30 °C to as much as 30 grams.

"Perspiration" on cold surfaces
If the warm air now comes into contact with cold surfaces, it cools down. The air can no longer retain as much water vapour and it releases part of it as water.

Everyone who wears glasses and has entered a heated room on a cold day is familiar with this effect: The glasses fog up. Therefore, in winter, condensation always forms on single glazing and it freezes into "frost" on particularly cold days.
But most old custom windows were permeable and draughty: This means a constant loss of heat and a large waste of energy, but the interior air, heavy with water vapour, was continuously and automatically being replaced by dry air from outside as a result. Modern frames, on the contrary, are very well sealed and prevent any replacement of the air from taking place.
Modern glazing also saves energy:

Coated heat-insulating glass, with U-values of 1.3 or even 1.1 W/m²K, often have a higher surface temperature than the inside surface of the external walls – only a little heat is therefore lost through the glass. That also means, however, that the condensation no longer forms on the custom window panes, as it did previously, but rather on the walls – the coldest part of the room: and this can lead to mildew forming there.

It is therefore important: Ventilate regularly!
It's easy to do something about it: just ventilate regularly! That doesn't mean that a custom window has to be open or tilted all the time; quite the opposite: Windows should remain closed most of the day, so that the heat insulation of the glazing can take effect. Shock ventilation is the right thing to do: Open the custom windows wide and make sure this creates the opportunity for a draught to flow. The used, moist air in the room will have been replaced by dry, fresh air after five to ten minutes.

This shock ventilation leads to less heat loss than you might think: The cold, fresh air can be heated up again quickly and the heat remains stored in the walls and furniture in the room. The fresh, warmed air can now absorb moisture again.
Repeat this procedure up to three times per day: Because a single airing no longer suffices due to the "hermetic" sealing of joints and cracks these days and longer periods of ventilation only lead to the room cooling down – that is to say: loss of energy.

Summary: Modern, heat insulating and airtight custom windows and doors save energy, reduce your heating costs and environmental damage and increase your standard of living. Correct, regular ventilation makes sure that used, moist air is replaced by dry, fresh air and takes full benefit of the heat insulation.