What is thermal fracturing / thermal shock?

14.03.24

Thermal fracturing, also known as thermal shock, takes place when a glass panel breaks due to large differences in temperature across the surface of the glass. Uneven warming of a glass panel creates tension in the structure of the glass: the warm area expands while the cool area resists expansion, and this may cause the […]

Why are there air bubbles or streaks inside the window glass?

23.04.20

The glass may have some marks created during the flat glass manufacturing process. The flat glass is not required to be optically perfect – small marks or ‘bubbles’ are acceptable as per the glass quality specification. Detailed instructions for checking non-conformities are available from the Finnish Flat Glass Association (Tasolasiyhdistys) and in the relevant RT […]

How to take care of self-cleaning glass?

23.04.20

Self-cleaning glass is regular glass that has been coated with a specialised dual-purpose coating on the outside. Organic debris on the glass is dissolved by sunlight and flushed away by rain. The coating is very securely fixed to the glass, and it can only be damaged if the glass itself is damaged by e.g. a […]

How to prevent the window from misting? (condensation on the internal surface of the outer frame)

23.04.20

Check that all locks in the internal and external frames are securely closed. Check the settings of the ventilation system inside the property (should be negative pressure). Test the pressure as follows: Open a ventilation window slightly (by about an inch) and hold a lit lighter in front of the window. If the flame turns […]

How to prevent the window from misting? (condensation on the internal surface of the glass)

23.04.20

The condensation is probably caused by high humidity in the room and inadequate ventilation around the glass surface. Try the following: Check that the room has adequate ventilation. If the room/window has an intake air valve, make sure that it is open. The ideal relative humidity for indoor spaces is 35–55%. Check that the room […]

How to prevent the window from misting? (condensation on the external surface of the external glass)

23.04.20

The external surface of the window can become misted during certain times of the year when humidity is high. This condensation is caused by low indoor temperature or very good thermal insulation capacity of the window. The condensation forms on the external surface of the glass, when outdoor temperature (and outdoor dew point) rises faster […]

How to prevent the window from misting? (condensation inside the multiple glass unit)

23.04.20

If condensation forms inside the multiple glass unit, the unit is not properly sealed. If this happens within the 5-year seal guarantee, we will supply a replacement unit.

How is there dust or insects inside the window?

23.04.20

Two-frame windows are designed to allow ventilation inside the two frames. For that reason, the seals must have ventilation gaps to enable air to circulate. In addition, the aluminium profile of the bottom frame has water holes, which serve two purposes: They channel rainwater off the aluminium strip in a controlled way They ventilate the […]

How to remove glue or other persistent stains on window glass?

23.04.20

The glass may have residual glue from stickers used during the manufacturing process, which is difficult to remove with regular detergents. We recommend carefully removing most of the stain with a glass scraper and cleaning off the residue with xylene, which can be purchased from e.g. paint stores. A cloth dampened with xylene can also […]

How to clean a Skaala FrostFree window?

23.04.20

All glass surfaces of the Skaala FrostFree window can be washed in the same way as any regular glass, by using plenty of water and regular neutral (or mild alkaline) detergents or other commercially available window cleaning products. If the window has persistent oily stains or other organic stains, acetone or xylene can be used. […]

Why do the windows make cracking or snapping noises?

23.04.20

When temperature changes, the external aluminium parts and joining materials heat up at different rates. Cracking or snapping noises are caused by the difference in the heat expansion properties of different materials. The phenomenon is common in spring when temperature changes rapidly. Heat expansion does not damage the window structure. The structures of Skaala products […]

What causes loose fittings on windows or doors?

23.04.20

The loosening of fittings is normal and caused by heavy use. It can be prevented by using thread-locking compound, which is available from hardware stores and motoring shops.