I replaced single-glazed sliding doors that divided the sitting room and dining room with a sliding KALLAX bookcase. For one “door”, I used two 2×2 cubes and one 2×1 unit. As we already owned 4 separate KALLAX 2×2 cubes and they seemed to be exactly the same width as the internal doors, we thought it might be possible to stack them. With one additional 2×1 KALLAX they almost matched the height of the internal doors. Sliding KALLAX bookcase doors in closed position First, still a work in progress but let us show you how it looks from the dining room, when the units are pushed together to close up the doorway. And the units pushed apart to enter the living room. We can access the storage cubes from both sides — from the dining or living room — which is so very useful. What I like most is, when viewed from the living room, when closed, it looks almost like a built-in unit. IKEA item used: 2×2 KALLAX units x 4 1×2 KALLAX units x 2 Other materials: 3M mounting tape...