Level-authored reproducibility analysis. This report makes the retained calculator inputs auditable. It is not an original college or agency document.
| Question | Calculation | Illustrative result |
|---|---|---|
| Recurring housekeeping | 25,000 × $0.14 per year | $3,500 per year |
| Replacement if commissioned | 25,000 × $22.12 per project | $553,000 once |
| Portfolio planning allowance | 25,000 × published $1.02 per year | $25,500 per year (rounded input) |
The planning roof is not an observed typical building. The illustration applies one schedule rate; it does not establish applicable minimum charges or site-specific contract terms. Annual housekeeping is the recurring headline. The allowance is a long-run planning scenario, not revenue a roofer can book this year. Known roof condition, scope and an actual contract still determine the bid.
Separate the recurring contract book from replacement pipeline. Track roof area, contract scope and scheduled work independently. A replacement backlog is not recurring revenue; spending allowances do not tell you which roof will fail next. Use your own bid and direct-cost records to estimate gross profit.
Canonical model version 2026-10-06.1. No source observation dates were refreshed. Canonical model and original source links.
Divide each retained award or base bid by its roof footprint. Take Helena's median first, then take the median of the three agency centers. This prevents three Helena projects from acting as three independent markets.
| Agency / listed project | Reported roof sqft | Award / base bid | Award / roof sqft |
|---|---|---|---|
| Waukesha County Technical College G and S roof replacement base bid, archived official memo / Listed project | Approx. 52,312 | $1,157,000 | $22.117296 |
| Henrico WRF / Listed project | 22,000 | $731,055 | $33.229773 |
| Helena Public Schools / Listed project 1 | 7,120 | $150,502 | $21.137921 |
| Helena Public Schools / Listed project 2 | 8,070 | $274,135 | $33.969641 |
| Helena Public Schools / Listed project 3 | 24,110 | $450,000 | $18.664455 |
| Agency | Projects | Within-agency median / roof sqft |
|---|---|---|
| Waukesha County Technical College G and S roof replacement base bid, archived official memo | 1 | $22.117296 |
| Henrico WRF | 1 | $33.229773 |
| Helena Public Schools | 3 | $21.137921 |
Median of unrounded agency centers = $22.117296; published center = $22.12. Observed project span = $18.66 to $33.97 per roof square foot. This span is not a measured market percentile or confidence interval.
The retained canonical numerator is the $1,157,000 base bid. The original memo recovery detail describes $58,000 contingency and $1,215,000 total authorization. Those two extra budget figures are separately described in the recovered original memo; check its verification and integrity notes. The memo reports approximately G 50,390 + S 1,922 = 52,312 square feet. The summed value preserves the printed approximate areas, not a measured precise footprint. The contingency and total authorization are excluded from the price-per-area numerator; the summed reported roof area is the denominator.
WCTC source status: Archived primary memo recovered; canonical verification metadata applies. Other rows are retained primary references, not newly refetched or reverified by this generator.
Replacement center = median(agency medians of award / roof area). Annual portfolio center = annual housekeeping + unrounded replacement center / assumed central cycle.
| Planning bound | Formula | Published $ / roof sqft / year |
|---|---|---|
| Low | 0.14 + minimum raw project ratio / 30 years | 0.76 |
| Central | 0.14 + median raw agency center / 25 years | 1.02 |
| High | 0.14 + maximum raw project ratio / 20 years | 1.84 |
The 20/25/30-year cycles are planning assumptions, not observed replacement hazards. The bound pairs intentionally combine different cycle assumptions with the observed project envelope. They are not statistical percentiles.
Evidence class: Level-authored reproducibility analysis of retained external references and explicit planning assumptions. Publisher: Level. Primary-source recovery and the website's citation checks remain separate from arithmetic reproducibility.
Item 47 publishes annual roof housekeeping at $0.14 per roof square foot. Item 46g and Item 47 also publish inspection, leak-investigation, and minor-repair day rates, which are not added without a measured productivity assumption.
https://www.seaportmanatee.com/agendas/agenda032426/agenda032426.html
The original live packet returned 404 on 2026-10-07. Archived bytes match the Internet Archive payload digest. The archived packet has missing-EOF and cross-reference/stream warnings; its complete roofing memo on page 36 is readable and is the evidence used. This is not a claim that the entire packet is intact.
https://web.archive.org/web/20260615113430id_/https://www.wctc.edu/Files/_site-pdfs/district-board/meeting-documents/2026-01/01132026-Board-Packet.pdf
Retained award and roof-area inputs; scope matching and primary provenance must be checked.
https://swagit-attachments.granicus.com/uploads/event/agenda_file/38994/052725ag.pdf
Retained award and roof-area inputs; scope matching and primary provenance must be checked.
https://helenaschools.org/wp-content/uploads/2024/03/Board-of-Trustees-Agenda-04.09.24.pdf
Base contractor bid, excluding contingency. The legacy award field does not mean total board-authorized project cost.
Document date: 2026-01-13
Archive capture: 20260615113430
Verified: 2026-10-07
Verified scope: Exact printed page36 roofing memo content, checked in extracted text and actual visual render. No certification of complete content on all other packet pages.
Integrity limitation: The archived packet has missing-EOF and cross-reference/stream warnings. The complete roofing memo on page 36 is readable; this record does not certify the entire packet as intact.
Archived original SHA256: 732d381a3bc8cb928fc231c17d206b1f1f839fee4feeac0d963bca238c801608
Verification record SHA256: 4740788ad9d4f2cb5eadda6bf44ed69a3a24b9e155e70b3b09ed760cb5a0c3e5
Signed minutes: Signed minutes corroborate approval and contractor identity, not the exact area or bid amount.
Canonical model version: 2026-10-06.1
Canonical content digest: 64e5031dc4cd50cb
SHA256 of canonical file bytes: 47b18378c16633748614317bb3fac966b5cf4485a66f0dfc98f4f3890c98aa07
Canonical model
Machine-readable reproduction report
Interactive calculator
The report is reproducible from the canonical JSON using scripts/generate-roofing-reproducibility-report.mjs. Its source URLs identify the original records; the Level-authored PDF does not certify a missing institution document.