The Grundel Window system – The profitable environmental choice

Don’t replace your windows, we have an smarter alternative.

We turn your double-glazed windows into energy-efficient triple-glazed windows. Grundels sealed glazed units, location-bulit, are a tremendously simple, cost-effective – and therefore profitabkle – way of insulating your existing windows for energy and noise.

Our product is for everyone with double-glazed windows: residences, offices, schools, hospitals, other public loactions, houses and especially listed buildings.
The installation is done on the inside of the window, and thus does not affect the window’s external appearance. Installation is performed with minimal disruption to tenants and activities.

Our sealed glazed units, loaction-bulit, can be constructed with different thickness of glass ant installed in generally any type of window.


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