What are HST balcony doors?

Among the most popular solutions these days are lift-and-slide doors or HST for short. They are characterised by very low thresholds ensuring high tightness of fit and unprecedented comfort of use. The choice of systems and thermal versions is very wide. The system we use most frequently is YAWAL DP150 THERMO with increased insulation parameters and Aliplast Ultraglide. We can make similar doors based on any other system like Reynaers, Schuco or Aluprof. HST type doors enable structures which are over 3000 mm high, 4500 mm wide with sashes weighing up to 300 kg. Perfect lift-and-slide fittings make it easy and comfortable to operate even such large and heavy sashes. A very interesting option is the possibility of fitting two sashes in such a way that they come together at a 90 degree angle with no need to fit a permanent pillar. This allows the construction of so called ‚open’ corners in the buildings of an overall length of 2×6000 mm, where, after both the sashes have been opened, the corner’s length is 2×3000 mm. This structure, however, requires a lot of knowledge and experience from the contractor and needs to be taken into account at the very early stage of the building design process.

Possibilities

HST doors can be equipped with the basic Hau-Tau or Siegenia Aubi fittings which ensure many years of problem-free use. Extra equipment could be: braking system, opening support system or automatic system which fully operates the door, thus making it more comfortable to use. In case of very heavy doors, electric operating is advised in order to make their use easier and safer.

Aluminium lift-and-slide HST doors are made of profiles which have been powder coated with one of the full RAL scheme colours, anodised or coated with structural wood-simulating paints. The structure can be painted different colours on both sides so as to match particular interiors.

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