Survey the boundary and levels before excavation
Confirm the legal boundary, permits and underground utilities before breaking ground. Record the high and low points, sudden changes in grade, corners and gate positions with suitable levelling equipment. A string line controls alignment, but it is not a complete height plan on a slope. Lay out the actual panel modules on a drawing so the number and location of steps—and any need for longer posts—are known before ordering.
Choose stepping or a slope-compatible system
With stepped installation each rigid panel stays level and the next bay drops. A raked or cut-to-grade arrangement is acceptable only when the selected panel and fixing system explicitly permits it. Do not force a rigid welded panel to follow the ground. Adjustment increments quoted in one manual are product-specific, not universal; confirm permitted steps, cuts and fixing points in the current manufacturer documentation.
Work down from the high point
Set corners and gate posts as fixed references, then space intermediate posts using the measured panel width, fixings and tolerances. Starting at the high point often makes level control easier. Do not pull panels or twist clamps to compensate for a bad post centre. Recheck line, plumb and step height every few bays, and solve narrow end bays in the layout rather than with an improvised cut.
Match posts and foundations to the site
Steeper drops may require longer posts to retain the required embedment while supporting a lower panel fixing. Foundation size depends on fence height, bay width, wind, soil, frost and the approved design, so there is no safe universal hole size. Remove loose material, hold each post plumb while concrete is placed and manage surface water. For base-plated posts, verify the concrete and anchor design before drilling.
Control bottom gaps and erosion
Stepping can create triangular gaps beneath panels. If these conflict with security, animal control or maintenance needs, resolve them in the design. Do not simply bury coated panels. Use only compatible plinths, holders or infill details. Preserve drainage and inspect for scour around footings, exposed plinths or moving fill; major level differences and retaining work require separate engineering assessment.
Protect coatings and fixings
Site cutting and drilling breach protective coatings. Perform them only where allowed, with the specified tools and repair system. Keep grinding sparks away from finished surfaces. Install clamps and bolts in the prescribed sequence: over-tightening can damage wire, coating or polymer parts, while loose fixings can rattle. Check compatibility where different metals meet outdoors.
Complete a final line and safety inspection
Inspect post plumb, the top line, consistent steps, every fixing and all cut edges. Confirm gates clear the slope and latch at the correct level. Record products and level checks, then inspect the line again after heavy rain or seasonal ground movement. A sound sloping installation combines boundary control, system compatibility, soil, drainage and maintenance—not just a stepped appearance.