Assess the base before the shed panels leave the box
Measure the proposed footprint and inspect the full supporting surface with a long level. A small fall intended for drainage is different from a twisted or soft base that prevents a frame from sitting square. Note standing water, vegetation, broken slabs and the distance from fences or walls needed for assembly and later treatment. Check the product instructions for base dimensions and anchoring. Do not expect a prefabricated shed to correct an unsuitable foundation as it is tightened together; distorted doors and roof joints can follow. Confirm who will prepare the base and when it will be ready. Photograph it after clearance, not only while covered by old storage. A sound starting surface protects every later assembly step and makes the finished door and roof easier to assess.

