Materials
Roof Sheet (CGI) Calculator
Estimate the number of corrugated roof sheets and J-hook screws needed for any sloped or flat roof, plus total cost in NPR. Tuned for the standard CGI/CSC sheet sizes sold across Nepal.
Layout
3 × 8
Total sheets
24
Total screws
288
Total cost
NPR 37,104
Notes
We assume an effective sheet coverage width of 0.762 m (~30 inches) and a 150 mm endlap when sheets stack along the slope. Add extra for hip caps, ridge caps, and gable flashing — those aren't covered here. For very steep roofs, measure the actual slope length, not the horizontal projection.