Assembly varies by model. Some two-piece sectionals arrive compressed or vacuum-packed and require no tools—just unpack and allow up to 72 hours for cushions to expand. Other models require assembly (typically by an adult) using included tools or the provided instructions.
Many two-piece sectionals are fully modular and allow the two pieces to be rearranged into L-shaped layouts, straight-line sofas, or used as separate pieces to adapt to different room layouts and space needs.
Listings often note that sectionals may be vacuum-sealed or shipped in multiple boxes; expect compressed packaging on delivery, unpacking instructions, and a recovery/expansion period (commonly up to 72 hours) after unpacking.