DuctWrap Board

DuctWrap Board is an offline-first workbench for sheet-metal techs, insulation installers, mechanical contractors, and trade apprentices who need real HVAC duct wrap squares—not a generic construction calculator or lumber list. Cold start opens the duct-squares board. Enter rectangular duct width, height, length, and wrap thickness; the board maps each segment into labeled, measurable wrap faces, applies your waste factor, grows outside dimensions for insulation thickness, and shows clear net-versus-gross square footage. Lock a shop-ready material buy card in the same flow. Gross area converts into stock sheet or roll counts with selectable stock sizes and leftover callouts, so you can message the shop or supplier without rebuilding the takeoff in a spreadsheet. Key capabilities: • Fullscreen duct-squares board for face-by-face wrap layout from W×H×L and thickness • Live wrap-area engine with waste percent, OD growth, and net vs gross SF • HVAC buy card: sheet/roll counts, stock sizes, and leftover notes • Multi-segment jobs—supply and return runs, elbow equivalent-length notes, per-duct and job-total needs on one board • Seed library of common rectangular duct sizes, wrap thickness presets, and stock sheet/roll SKUs • Saved jobs with rename, duplicate, and archive in local storage • Inch/mm preferences and default waste factor restored on every launch • Share the buy card as a plain-text summary via the system share sheet • Fully offline core loop—no account and no cloud sync required Built for on-site and shop floor use: geometry to wrap squares to buy card, without spreading sheets or fighting a marketing home screen. Coach-mark hints appear on the board only. Privacy Policy and Terms are available in-app from settings and the first-run notice, covering local persistence only. DuctWrap Board stays honest about scope: rectangular duct wrap takeoff and material counts. It is not a full estimating suite, CAD package, or hang-lab replacement—and that focus is what keeps the board fast when you need numbers now.