Calculadora de revestimiento exterior (siding)

1. Muros
   wall length × wall height
   140' 0" × 9' 0" = 1,260.00 SF
2. Hastiales
   gables × width × height ÷ 2
   2 × 30' 0" × 7' 6" ÷ 2 = 225.00 SF
3. Ventanas y puertas
   count × width × height, each
   10 × 3' 0" × 4' 0" + 2 × 3' 0" × 6' 8" = 160.00 SF
4. Área neta
   walls + gables − openings
   1,260.00 SF + 225.00 SF − 160.00 SF = 1,325.00 SF
5. Cuadros
   net SF ÷ 100
   1,325.00 SF ÷ 100 = 13.25
6. Cada pieza cubre
   exposure × piece length
   8" × 12' 6" = 8.33 SF
7. Piezas
   net SF ÷ SF per piece, rounded up
   1,325.00 SF ÷ 8.33 SF = 159
8. Moldura en vanos (canal J)
   windows: 2 × (width + height); doors: 2 × height + width
   10 windows + 2 doors = 172.7
9. Bordes del hastial
   gables × 2 × √((width ÷ 2)² + height²)
   2 × 2 × √(( 30' 0" ÷ 2)² + 7' 6" ²) = 67.1

De dónde salen los números

• Exposure: Fiber-cement plank: plank width − 1¼" lap (8¼" plank = 7" exposure) · double 4" vinyl: 8" exposure, 12'6" panels (8.33 SF each, 24 = 2 squares)James Hardie HardiePlank instructions (and IRC R703.10.2) call for at least a 1¼" overlap, so the exposure is the plank width less 1¼" — 8¼" = 7", 6¼" = 5". Vinyl exposure is set by the panel: Owens Corning lists double 4" panels at 8" exposure, 12'6" long, 2 squares per carton, and double 5" at 12' long (https://sweets.construction.com/swts_content_files/40974/P26544.htm). Check your product's carton — lengths vary by brand.Fuente
• Board and batten: Boards = wall length ÷ (board width + gap), rounded up · one batten over each gapGeometry only. The last board of each wall meets a corner, so it gets corner trim instead of a batten. Boards run past windows and doors and are cut around them — openings are not deducted. Piece counts assume boards are not spliced up the wall more than needed (wall height ÷ piece length, rounded up).