A bold modernity that preserves existing traditions. How is this possible? Exterior: aluminium. Interior: wood effect. The inhabitants of the multi-family house had different priorities when it came to selecting the interior veneer for their windows. Finstral’s modular window systems allowed them to choose the interior and exterior materials independently of one another. The windows also offer thermal insulation to Passive House standards as well as excellent airtightness. The house thus always enjoys a pleasant climate: neither too hot nor too cold.