Despite their slender dimensions, outstanding insulation values are achieved by the wood-aluminium window models in the INLINE 91 range, which are available in spruce, larch or oak. Innovative technology and years of experience over almost a century have allowed Gaulhofer to attain an optimum Uw value of 0,76 W/m2K (other models to 0.91 W/m2K). The nonetheless ultra-slim sash is only separated from the shutter frame by a fine stop joint – a feature that looks very appealing. In addition, Gaulhofer Thermostop® and Thermostop®plus use high thermal insulation glass spacers to make sure no condensation can form on the inside of the glass.

The INLINE 91 wood-aluminium window series from Gaulhofer grants your right to personal design – you can choose from our extensive selection of colours with a total of 46 possible variations! Besides the wide range of shades, you also benefit from Gaulhofer's unique wet seal, which ensures a hermetically tight glass joint, so putting an immediate stop to wind and rain. With Gaulhofer Audiostop® featuring three circumferential seals, you are guaranteed peace and quiet for a good night's sleep. Gaulhofer Dampfstop® uses cleverly designed special seals at the glass rebate to keep the glass joint dry at all times, so further improving the life and look of the sash timber.

It was not by chance that the minimalist design and uncompromising clean lines of this series came in for a "Special Mention" from the top-flight judging panel of the German Design Award 2017 in the category "Buildings & Elements". The panel justified its decision as follows: "The flush, ultra-slim design creates a contemporary look of elegance. The window nonetheless satisfies the technical demands of modern-day architecture."