How can you spot sandwich panel installation errors before closing the façade?

Agree the unloading area and the order in which packs will be needed. Unplanned handling can damage panels. Inspect the delivery before moving material around the site. Recording material condition separately from frame acceptance helps trace defects and decide on repairs.

The first panel establishes the line for the rest. Check alignment, outer face, cover width and plinth connection. Compare the setting-out with the opening positions on the drawing. A small repeated error may show up only at the last corner, when several panels have to come down.

Check fastener type and tool setting. Inspect washer seating, facing condition and engagement in the support. Seeing a screw head gives no assurance that the support was hit correctly. Approve the first connection before repeating it across the wall.

Record the approved setting as a reference. Recheck it when the panel batch, support type or tool operator changes. Spotting a change in washer compression or joint position early limits the number of panels needing correction.

Inspect joint engagement and the position of the seals specified for the system. An even surface can hide a missing seal. Check concealed fixings before the next panel covers them, and record what was inspected at that point.

Respond to stripped holes, distorted washers and local dents as they appear. Identify a repair that maintains load capacity and weathertightness before adding a screw nearby. For fire-rated walls the repair must also remain within the approved assembly detail.

Inspect reveals, corners, plinths and roof junctions before fitting cover trims. Trace the insulation and water drainage route. Verify that seals are in the specified positions. A wide flashing may conceal a gap or missing support while leaving the underlying defect in place.

Pay special attention to late service penetrations, which may have missed earlier design checks. Inspect the framing and seal around each opening. Where fire performance is affected, check the appropriate penetration detail. General-purpose foam or a trim strip alone gives no evidence of the required performance.

Remove drilling and cutting swarf before it spreads over the coating or starts to rust. Check cut edges and the protective film. Remove the film within the manufacturer’s timeframe. Film left too long can become hard to remove and hide surface damage at handover.

Use a cleaning method suitable for the coating. Abrasives and unsuitable solvents can damage it. Match touch-up material to the sheet’s protective finish. Assess substantial distortion or delamination separately, as a cosmetic repair may leave the panel’s performance impaired.

Record panel variants, fixings and seals actually used. Include photographs of concealed work and agreed deviations. Compare opening positions with the drawings and incorporate changes made on site. This record provides a reliable basis for later inspections and repairs.

Hand over the maintenance instructions and identify locations needing particular attention. Agree how the operator should report leaks or impact damage. Each inspection record should show which function of the envelope was checked before access was lost.