Peter Staic has completed a year-long, €5m ($5.5m, £4.2m) renovation project at the family-run Hotel Arlberg alpine hotel and spa in Lech, Austria, with healthy paints, calming colours and natural materials.

The hotel's newly extended spa now features glass courtyards, library and relaxation rooms, a stainless-steel heated outdoor pool with an integrated whirlpool and sauna and steam rooms.

There are also Dornbracht hydrotherapy facilities for horizontal water massages, chromotherapy, aromatherapy and multi-sensory water experiences.

Elsewhere, 11 rooms, including a two-bedroom family suite, have been updated.

Staic, who is a descendant of the hotel's original builder, worked on the project with Pointner Design, who provided interior and lighting design expertise.

Between them they ensured the paints used for the renovation work were made from entirely natural ingredients, with colours derived from volcanic clays, semi-precious stones, Carrara marble and ultramarine ash.

Colours were chosen to evoke different feelings, such as relaxation or invigoration, depending on where they were used, while ensuring that the palettes remained sympathetic with the alpine surroundings.

Among the materials used were lime plaster, which contributes to the natural feel of the design, helps to balance humidity and resists mould.

Vals quartzite stone was also used, again contributing to the naturality of the design and also adding a degree of exclusivity.