Uniformat B3010 · Envelope
Roof, modified bitumen
Also called mod bit, SBS roof, 2-ply roof
Municipal lives for roofing (B30)
36 municipalities in British Columbia, Ontario and Alberta state a life for roofing as a whole, in 27 distinct tables: 10–50 years, median 25. 50 rows come from capital asset policies (accounting lives, used for amortization) and 1 from asset management plans (planning lives, used to forecast replacement). They describe the system rather than this component, and none is a measured life.
Years. Each dot is one stated life and each bar a stated range; equal values stack. Hollow marks are planning lives from asset management plans; filled marks are accounting lives from policies. The dashed line is the median. Policies that copy the same table count once.
All 42 stated lives
| Municipality | As written | Years | Kind | Source |
|---|---|---|---|---|
| Okanagan-Similkameen | Roofs | 10–20 | accounting | p11 · 2023 |
| Rainy River | Building Improvements - Roofs | 15 | accounting | p11 · 2010 |
| Rainy River | Building Improvements - Roofs | 15 | planning | p17 · 2026 |
| Trent Lakes | Roofing - Asphalt | 15 | accounting | p10 · 2009 |
| Trent Lakes | Roofing - Tar & Gravel | 15 | accounting | p10 · 2009 |
| Fort St. James, Revelstoke, Rossland, Sicamous, Tumbler Ridge · same table | Roofs | 15–20 | accounting | p5, p9, p7, p9, p5 · 2010 |
| Salmo | Roofs | 15–20 | accounting | p6 · 2016 |
| Greater Madawaska, Quinte West · same table | Shell - Roof | 15–35 | accounting | p17, p38 · 2025 |
| Duncan, North Cowichan · same table | Building Roof | 20 | accounting | p17, p9 · 2011 |
| Lantzville | Building Roof | 20 | accounting | p11 · 2019 |
| Telkwa | Roofs | 20 | accounting | p8 |
| Chapple | Building Improvements - Roofs | 20 | accounting | p1 |
| Grey Highlands | Flat Roof | 20 | accounting | p11 · 2026 |
| Grey Highlands | Asphalt Shingles | 20 | accounting | p11 · 2026 |
| Kapuskasing | Roofs | 20 | accounting | p14 · 2009 |
| London | Building Components - Shell (siding, windows, roofing) | 20 | accounting | p2 · 2023 |
| Orillia | Roof | 20 | accounting | p19 |
| Prince Edward | Buildings - Roof | 20 | accounting | p34 · 2022 |
| Trent Lakes | Roofing - EPDM | 20 | accounting | p10 · 2009 |
| Welland | Roof | 20 | accounting | p8 · 2021 |
| Bancroft, Centre Hastings, Hastings Highlands, Wollaston · same table | Roofing | 20–25 | accounting | p5, p4, p6, p5 |
| Parksville | Roof Finish | 20–30 | accounting | p9 · 2023 |
| Canmore | Roof | 25 | accounting | p10 · 2025 |
| Parksville | Asphalt Shingles | 25 | accounting | p9 · 2023 |
| Tofino | Roof | 25 | accounting | p12 · 2009 |
| Greater Napanee | B25 Roof, Storage Domes | 25 | accounting | p16 · 2012 |
| Grey Highlands | Metal Roof | 25 | accounting | p11 · 2026 |
| Kirkland Lake | Buildings and Improvements - Roof | 25 | accounting | p10 · 2020 |
| Meaford | Roof - Asphalt Shingles | 25 | accounting | p17 · 2020 |
| Sarnia | Roof | 25 | accounting | p1 |
| The Blue Mountains | Roofing - Flat | 25 | accounting | p11 · 2019 |
| The Blue Mountains | Roofing - Asphalt Shingles | 25 | accounting | p11 · 2019 |
| Westlock | Roof | 25–30 | accounting | p9 · 2021 |
| Meaford | Roof - Soffit & Fascia | 25–50 | accounting | p17 · 2020 |
| Vulcan County | Roof | 30 | accounting | p5 · 2024 |
| Meaford | Roof - Flat | 30 | accounting | p17 · 2020 |
| Meaford | Roof - Tile | 30 | accounting | p17 · 2020 |
| The Blue Mountains | Roofing - Metal | 30 | accounting | p11 · 2019 |
| The Blue Mountains | Roofing - Tile | 30 | accounting | p11 · 2019 |
| Trent Lakes | Roofing - Steel | 40 | accounting | p10 · 2009 |
| Meaford | Roof - Metal | 40–50 | accounting | p17 · 2020 |
| Parksville | Roof Structure | 50 | accounting | p9 · 2023 |
Of 51 rows, 3 were compared with an image of their page; 48 were matched to their page automatically (the label and number appear in the page text). Follow the page link before relying on an automatically matched row. About the policies · All approved rows as JSON
What this entry needs
- Service life sources: municipal asset management plans and capital asset policies that state a life for it, manufacturer literature, or open research.
- Maintenance tasks: manufacturer manual requirements, and standards referenced by clause number.
- Replacement records: install and removal dates from real buildings. These are what eventually earn an entry grade A.
Have a source? Send it to [email protected]. Read the sourcing policy first: paywalled tables can't be used.
For agents
map_classification on the MCP server already matches asset register names like “mod bit” to roof-modified-bitumen, and returns entry_published: false until an entry exists.