Assembly varies by model: some sectionals ship compressed or fully assembled with no setup required, while others need adult assembly either tool-free or with tools (sometimes included). Large or modular sectionals commonly ship in multiple packages that may ship and arrive at different times, so expect staggered deliveries for bigger configurations.
Some sectionals list third‑party certifications or standards on certain models. Examples include OEKO‑TEX STANDARD 100 for textiles and FSC certification for wood construction; not all listings include certifications, and availability varies by model.