Wussten Sie schon: Dass alle vor 1995 produzierten Fenster technisch völlig veraltet sind?

Save energy systematically

Windows are no. 1 when erecting new buildings and in renovating older ones

What many people aren't aware of: not only old single-glazed windows but also wood, aluminium and PVC windows with old double glazing made before 1995 burn away your money! If you systematically install innovative building insulation you can significantly reduce your energy costs. This is achieved firstly by replacing old windows. Most of them are insufficiently insulated, technically outdated and, in many cases, not fully functional. The calculations in the Energy Saving Ordinance included window insulation values for the first time in 1994. As regards energy and technology, windows made before 1995 are therefore long out of date and replacing them should be regarded as imperative. For example, windows with the old single glazing have a very high Ug value (thermal conductivity coefficient of glass) of >6.0 W/(m2K), and later ones with double-glazed insulation a Ug value of 3.0 W/(m2K).

GAYKO already offers you very good high-tech insulated glazing with a Ug value of 1.1 W/(m²K) in the standard version. With Gayko Super insulating glass units you get the best values of all: The triple pane argon gas-filled construction achieves the outstanding Ug value of 0.5 W/(m2K), which makes it suitable even for passive houses.


Potential savings when replacing old windows
GAYKO windows reduce the heat loss over the whole window and its edges; they are an important part of a building's insulation in new buildings and in renovation.

If you replace single-glazed windows you can save up to 1600 €. Calculated for a detached house with about 27 square metres of window area. Energy prices as of 01/07/2008.

Huge savings in energy costs immediately

Thermal energy losses by transmission*

Example calculation, 1982 house with old double glazing and living area of 160 m2, approx. 27 m2 window area. Please note: With your specific type of building the example calculation can differ from the actual result.

* Transmission: The transfer of heat out of or into a building.



The ‘window-joint-wall’ system must be correct.

Installing new windows will give you the best thermal insulation if the whole installation process is done in the correct way and with the same state-of-the-art methods. That means that not only the U value (thermal transmission coefficient) of the glass (Ug, with g for "Glass") is considered and improved, but that of the whole window system including its connection to the wall, and skilled installation. This includes, in addition to an optimal insulation zone, windproof installation that practically stops all heat losses through ventilation in these edge areas. For this reason it is necessary to replace the whole window when renovating the building, so that the connections to the building are also redesigned and implemented. Only if the new window has a matching connection to the wall will the energy losses be curbed over the whole width.

Did you know: that all windows manufactured before 1995 are ENERGY GOBBLERS?