| Wall area | 1,440 sq ft |
|---|---|
| Gable ends | 225 sq ft |
| Garage doors (half their area taken off) | − 56 sq ft |
| Area to side | 1,609 sq ft |
| With extra for cuts and waste | 1,770 sq ft = 17.7 squares |
| Starter strip | 13 pieces (160 ft around the base) |
| J-channel | 24 pieces around windows, doors and gable rakes |
| Utility (undersill) trim | 11 pieces for the top course under the eaves and under windows |
| Corner posts (10 ft) | 4 outside, 0 inside |
| Siding nails | about 16 lb of roofing nails, or 8 lb of aluminum nails |
Ordinary windows and doors aren't taken off the area: the cut-outs end up as waste anyway. The Vinyl Siding Institute only takes off half the area of big openings like garage doors.