Should wall panels be installed vertically or horizontally?

Verify load capacity and deflection for the appropriate loads in both layouts. Use tables for the chosen panel configuration. Where a fire classification is required, check its conditions. The installation orientation may affect the scope of the classification and the permissible span.

Consider a 24 m long, 5.4 m high elevation with two large doors. These dimensions illustrate layout choices without prescribing support spacing. For vertical installation, examine full-height panels. For horizontal installation, lay out courses between supports and examine the divisions at each door jamb.

Draw the module widths and door frames. Mark narrow strips, cuts and end joints. Check how to clad the lintels without unnecessary waste. A pattern that suits a blank elevation may leave awkward pieces between windows. Compare the drawings particularly closely in these areas.

Keep the base level, door heights and top edge the same in both drawings. Otherwise changes in geometry will distort the visual comparison. First isolate the effect of panel direction, then refine the joint pattern in the chosen layout.

A long vertical panel reduces horizontal joints but needs suitable transport and handling. Shorter horizontal panels can simplify some operations while increasing the number of ends. In addition to factory length limits, consider access along the elevation and room for lifting equipment.

Check finish colour and span arrangement restrictions. Dark facings may carry specific length recommendations. Consider individual panel weight too. Fewer pieces may take longer to install if each is hard to manoeuvre in a narrow space beside the building.

Both orientations can use exposed or concealed fixings where the product system allows them. Check the detail for the actual panel. In horizontal layouts, panel ends and vertical joints may need extra flashings. Concealing screws in the side joint still leaves other divisions visible on the finished wall.

Examine a sample and the joint drawing. Agree the width of visible cover strips and the corner treatment. Across a large wall, profiling and reflections also shape the appearance. Base the decision on your own module and fixing details, since photographs of other buildings may show a different system.

Properly formed joints control water and air penetration. Follow the system instructions for installation order, seal positions and flashing ends. Check the specific details for each orientation. Even the same panel may need different treatment at ends and openings when its direction changes.

Plan access for inspecting joints before they are covered. For complex geometry, establish the order in which corners and reveals will be closed. Late decisions may leave insufficient tool access. Show these dependencies on the installation drawing before the material arrives.

For each option, calculate the panel area to order, number of ends, flashings, equipment and time for the details. A comparison based only on panel price per square metre misses costs that may outweigh some of the saving on the subframe, such as additional flashings or difficult fitting around openings.

Choose a compliant layout with a clear installation sequence. Agree the divisions with the structural designer and installer. If a door moves or the panel direction changes after ordering, recheck supports and fixings. Orientation forms part of the envelope design.