VS309 COST COMPARISON CALCULATOR — OVERVIEW
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WHAT IT IS
A self-contained tool that compares VS309 (FST's day-of-pour moisture solution) against a
competitor MVE epoxy moisture-vapor barrier across cost, schedule, leveling, moisture
mitigation, and LEED/CO2, and generates a branded, multi-page PDF report. Runs as a desktop
app or in a browser at https://calc.fstoversite.cloud — fully offline, no cloud dependency.

TWO INDEPENDENT CALCULATION FLOWS

  1. Leveling solution — driven by the leveled/corrected area you set as a head-to-head:
     "With FST" (e.g. 15%) vs "Typical" (e.g. 70%). Covers shotblast prep, leveler material
     (cost scales with coat thickness), labor, install/prep energy, transport, blast-abrasive
     make-up, and total cradle-to-installed CO2.

  2. Moisture-mitigation solution — driven by its own mitigated area (independent of the
     leveling %). Compares VS309 vs MVE on cost, schedule, and CO2, and itemizes everything
     VS309 eliminates: MVE surface prep (shot-blast to CSP-3), epoxy material + transport, and
     any primer — because VS309 installs day-of-pour and needs none of it.

WHAT IT QUANTIFIES (THE DIFFERENTIATORS)
  - Money saved — VS309 vs MVE product cost on the mitigated area.
  - MVE prep eliminated — the CSP-3 shot-blast + disposal VS309 avoids entirely.
  - Localized-area days saved — leveling-crew days (the overall schedule keeps moving).
  - Schedule days saved — MVE mitigation delay avoided (MVE goes to 0 days).
  - CO2 avoided (LEED) — embodied (A1-A3) + transport (A4) for the epoxy and abrasive, itemized.
  - No Red List chemicals — VS309 uses no epoxy; the four competitor epoxies carry
    bisphenol-A/F (ILFI Red List). Flagged in the report for LEED MRc4 conversations.

SOURCING INTELLIGENCE
Enter the project ZIP and pick a product; the tool finds the nearest manufacturing plant and
auto-fills the haul distance (feeding transport CO2) for both the leveler and the MVE product.
Imported products (e.g. Koster) resolve to their US port-of-entry.

OUTPUTS
  - Live results — KPI tiles + two detailed breakdown tables (Leveling & LEED; Moisture
    mitigation VS309 vs MVE).
  - PDF report — FST-branded, header on every page: leveling summary, mitigation head-to-head
    (with charts), full component breakouts (material, transport, energy, abrasive, primer),
    a "no Red List" statement, and an assumptions page.

All formulas and default assumptions are documented in docs/MODEL-NOTES.md; every value in the
tool is editable per project.