An installation for lift comprising: - a guide assembly of a cabin assembly and a counterweight assembly, said guide assembly comprising two profile elements (20, 21), each profile element extending longitudinally along a direction normal to the planes of the profile of said profile element, wherein said profile element is one piece, said profile element has a longitudinally extending planar face, and said profile defines: - at least one means for fastening to a wall panel, such that the profile element rests against this all section by this planar face, - first guide means (23; 23') extending longitudinally over the entire height of said profile element, and shaped for guiding along the longitudinal direction of the cabin assembly, - second guide means (24; 24') extending longitudinally over the entire height of said profile element, and shaped for guiding along the longitudinal direction of the counterweight assembly; - a cabin assembly comprising a cabin and at least one guide means, secured to said cabin and capable of cooperating with the first guide means of the profile element (20, 21) of the guide assembly, characterized in that the installation for lift further comprises: - at least one spacer element and securing means (29; 29') defined by said profile to secure the spacer element by the two ends thereof to the two respective profile elements; and, - each profile element is made entirely of a material comprising at least 50% by mass of aluminium. - a guide assembly of a cabin assembly and a counterweight assembly, said guide assembly comprising two profile elements (20, 21), each profile element extending longitudinally along a direction normal to the planes of the profile of said profile element, wherein said profile element is one piece, said profile element has a longitudinally extending planar face, and said profile defines: - at least one means for fastening to a wall panel, such that the profile element rests against this all section by this planar face, - first guide means (23; 23') extending longitudinally over the entire height of said profile element, and shaped for guiding along the longitudinal direction of the cabin assembly, - second guide means (24; 24') extending longitudinally over the entire height of said profile element, and shaped for guiding along the longitudinal direction of the counterweight assembly; - a cabin assembly comprising a cabin and at least one guide means, secured to said cabin and capable of cooperating with the first guide means of the profile element (20, 21) of the guide assembly, characterized in that the installation for lift further comprises: - at least one spacer element and securing means (29; 29') defined by said profile to secure the spacer element by the two ends thereof to the two respective profile elements; and, - each profile element is made entirely of a material comprising at least 50% by mass of aluminium. - at least one means for fastening to a wall panel, such that the profile element rests against this all section by this planar face, - first guide means (23; 23') extending longitudinally over the entire height of said profile element, and shaped for guiding along the longitudinal direction of the cabin assembly, - second guide means (24; 24') extending longitudinally over the entire height of said profile element, and shaped for guiding along the longitudinal direction of the counterweight assembly; - a cabin assembly comprising a cabin and at least one guide means, secured to said cabin and capable of cooperating with the first guide means of the profile element (20, 21) of the guide assembly, - at least one spacer element and securing means (29; 29') defined by said profile to secure the spacer element by the two ends thereof to the two respective profile elements; and, - each profile element is made entirely of a material comprising at least 50% by mass of aluminium.