Materials1 min read

CGI / Corrugated Sheet Roofing Calculator Guide for Nepal

Estimate CGI or corrugated roofing sheets, overlaps, ridge pieces and material cost for Nepal roofs—with pitch factor and local rates.

GharNaksa Team

Construction tracking for Nepal

CGI corrugated roofing sheet quantity planning for Nepal homes

CGI (corrugated galvanised iron) and similar profiled sheets are common on Nepal houses, extensions and temporary roofs. Searches for corrugated sheet calculator and CGI sheet size spike whenever a roof is priced.

Use the CGI / Corrugated Sheet Roofing Calculator: convert plan area to slope area with a pitch factor, deduct side and end laps, then add wastage and ridge pieces.

Measure cover width, not catalogue width

Manufacturers quote overall sheet width; the effective cover width after side lap is what determines sheet count. Confirm gauge, profile and cover width with your supplier before locking the order.

Do not forget the structure under the sheet

  • Purlins, trusses and fixings often cost as much as the sheets.
  • Insulation and false ceiling are separate line items.
  • Rainwater gutters connect to the rainwater harvesting calculator if you plan storage.
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