The price is primarily driven by the steel weight per square meter, the clear span width, and the cladding materials. A clear span design (no interior columns) is more expensive but offers maximum usable space. For roofing, 0.5mm color-coated steel sheets or Sandwich Panels (EPS, Rockwool, or PU) are standard; PU panels offer the best thermal insulation for Uganda's heat but come at a higher cost. Always request a detailed Bill of Quantities (BOQ) to compare unit prices for H-beams, C/Z purlins, and high-strength bolts.