A structural survey for solar PV involves a qualified structural engineer attending the site to measure structural member sizes, spacings, and conditions that cannot be verified remotely. Key tasks include measuring purlin depth, flange width, and web thickness; recording purlin and rafter spacing; identifying existing structural modifications; and documenting roof condition factors relevant to load capacity.
Under MIS 3002 V6.0, a structural survey is mandatory when a Desktop Structural Roof Loading Report returns a conditional pass or further investigation verdict, or when adequate structural drawings are unavailable. Solar Surveys targets site mobilisation within 24 hours of instruction, with a signed structural report delivered within 48 hours of the visit. Reports are accepted by MCS certification bodies, lenders, and DNOs.