Uniformat B3010
Roof, metal standing seam
Also called metal roof, standing seam
Service life
Years in service. The band runs from the shortest to the longest life the sources state, so it shows how much they disagree, not how long 80% of units last. The line is the median of the stated lives.
Basis
- 50 years · CNA e-Tool Estimated Useful Life Table, p8 · HUD CNA 3.3.4.1.2 “Metal” — U.S. Department of Housing and Urban Development (planning life)Same life for family and elderly properties. US multifamily housing. None of the sources says standing seam specifically.
- 30 years · The Blue Mountains: POL.COR.19.04 Tangible Capital Assets Policy, p11 · “Roofing - Metal” (accounting life)Capital asset policy (amortization period). Approved on text check: the label and value were found on the cited page.
- 25 years · Grey Highlands: By-law No. 2026-052, Tangible Capital Asset Policy A09-F-03, p11 · “Metal Roof” (accounting life)Capital asset policy (amortization period). Approved on text check: the label and value were found on the cited page.
- 40–50 years · Meaford: By-law 2020-83, Tangible Capital Asset Policy, Appendix A Estimated Useful Lives, p17 · “Roof - Metal” (accounting life)Capital asset policy (amortization period). Approved on text check: the label and value were found on the cited page.
- 40 years · Trent Lakes: 5.17 Capital Asset Policy, p10 · “Roofing - Steel” (accounting life)Capital asset policy (amortization period). Approved on text check: the label and value were found on the cited page.
How sources are chosen and recorded: sourcing policy.
Municipal accounting lives for roofing (B30)
20 municipal policies from Ontario set a life for roofing as a whole, from 16 distinct tables: 15–50 years, median 25. These are amortization periods chosen for accounting, not measured lives, and they describe the system rather than this component.
Years. Each dot is one stated life and each bar a stated range; equal values stack. The dashed line is the median. Policies that copy the same table count once.
All 28 stated lives
| Municipality | As written | Years | Source |
|---|---|---|---|
| Rainy River | Building Improvements - Roofs | 15 | p11 · 2010 |
| Trent Lakes | Roofing - Asphalt | 15 | p10 · 2009 |
| Trent Lakes | Roofing - Tar & Gravel | 15 | p10 · 2009 |
| Greater Madawaska, Quinte West · same table | Shell - Roof | 15–35 | p17, p38 · 2025 |
| Chapple | Building Improvements - Roofs | 20 | p1 |
| Grey Highlands | Flat Roof | 20 | p11 · 2026 |
| Grey Highlands | Asphalt Shingles | 20 | p11 · 2026 |
| Kapuskasing | Roofs | 20 | p14 · 2009 |
| London | Building Components - Shell (siding, windows, roofing) | 20 | p2 · 2023 |
| Orillia | Roof | 20 | p19 |
| Prince Edward | Buildings - Roof | 20 | p34 · 2022 |
| Trent Lakes | Roofing - EPDM | 20 | p10 · 2009 |
| Welland | Roof | 20 | p8 · 2021 |
| Bancroft, Centre Hastings, Hastings Highlands, Wollaston · same table | Roofing | 20–25 | p5, p4, p6, p5 |
| Greater Napanee | B25 Roof, Storage Domes | 25 | p16 · 2012 |
| Grey Highlands | Metal Roof | 25 | p11 · 2026 |
| Kirkland Lake | Buildings and Improvements - Roof | 25 | p10 · 2020 |
| Meaford | Roof - Asphalt Shingles | 25 | p17 · 2020 |
| Sarnia | Roof | 25 | p1 |
| The Blue Mountains | Roofing - Flat | 25 | p11 · 2019 |
| The Blue Mountains | Roofing - Asphalt Shingles | 25 | p11 · 2019 |
| Meaford | Roof - Soffit & Fascia | 25–50 | p17 · 2020 |
| Meaford | Roof - Flat | 30 | p17 · 2020 |
| Meaford | Roof - Tile | 30 | p17 · 2020 |
| The Blue Mountains | Roofing - Metal | 30 | p11 · 2019 |
| The Blue Mountains | Roofing - Tile | 30 | p11 · 2019 |
| Trent Lakes | Roofing - Steel | 40 | p10 · 2009 |
| Meaford | Roof - Metal | 40–50 | p17 · 2020 |
Each row was matched to its page automatically: the label and the number appear in the text of the cited page. An editor has not yet compared every row with the table, so follow the page link before relying on one. About the policies · All approved rows as JSON
Preventive maintenance
No maintenance tasks are sourced for this component yet.
Open questions
- The sources range from 25 to 50 years. Does panel type (standing seam or exposed fastener) explain the difference?
- HUD gives planning lives for US multifamily housing; the municipal rows are Ontario accounting lives. Neither is observed replacement data.
- No preventive maintenance tasks are sourced yet.
Know the answer? Send it with a source to [email protected].
Cite this
Citation
unfinished.one (2026). Roof, metal standing seam, v0.1.0. https://unfinished.one/c/roof-metal/v/0.1.0BibTeX
@misc{unfinished_roof_metal_0_1_0,
title = {Roof, metal standing seam},
author = {{unfinished.one}},
year = {2026},
version = {0.1.0},
url = {https://unfinished.one/c/roof-metal/v/0.1.0},
note = {CC BY 4.0}
}Licence CC BY 4.0 · How to cite · JSON · Versions: 0.1.0