Abstract: Double glass set of the type formed by an existing single glass set and a supplementary glass set with there between a spacer the sides of which are provided with an adhesive material that forms an airtight assembly between the spacer and glass sets, characterized in that the spacer is formed by a metallic profile (4-5-6-7), preferably in aluminium, which shows a rectangular section and the outside wall of which is provided with an L-shaped rib (16), the free flange of which is oriented towards the supplementary glass set (11), while the inside wall is prolonged past the side walls in order to form projections (21-22).