These windows are made from spruce and oak essences. For carpentry of wood is used triple layered profiles, with continuous sides, measures 84x68 mm. Finishing is made trough combined organic lacquers which resists to the action of UV, high humidity and it preserves the color even if these factors take action; finishes can be achieved in a wide range of colors that can satisfy all requirements. The carpentry is provided with 3 sets of seals (2 per frame and one per casement). We can execute complex forms.