{"id":"roof-asphalt-shingle","version":"0.5.0","classification":{"uniformat":"B3010"},"names":["Roof, asphalt shingles"],"aliases":["shingles","shingle roof"],"service_life":{"median_years":25,"range_years":[20,25],"range_basis":"source_spread"},"pm_tasks":[{"task":"Check ceilings and underside of roof deck for signs of leaks","frequency":"P6M","reference":"Public Buildings Service Preventive Maintenance Guide (Public Buildings Maintenance Standards)","url":"https://web.archive.org/web/20231003141600/https://origin-www.gsa.gov/system/files/GSA%20PBS%20Preventive%20Maintenance%20Guide%202022-01302023_0.pdf","page":51,"checklist":"ARCS-RFS-02-06M Roof Inspection - Shingle Type"},{"task":"Walk the building perimeter; check walls, gutters, scuppers and downspouts for leaks","frequency":"P6M","reference":"Public Buildings Service Preventive Maintenance Guide (Public Buildings Maintenance Standards)","url":"https://web.archive.org/web/20231003141600/https://origin-www.gsa.gov/system/files/GSA%20PBS%20Preventive%20Maintenance%20Guide%202022-01302023_0.pdf","page":51,"checklist":"ARCS-RFS-02-06M Roof Inspection - Shingle Type"},{"task":"Check for punctures, patches and debris near drains","frequency":"P6M","reference":"Public Buildings Service Preventive Maintenance Guide (Public Buildings Maintenance Standards)","url":"https://web.archive.org/web/20231003141600/https://origin-www.gsa.gov/system/files/GSA%20PBS%20Preventive%20Maintenance%20Guide%202022-01302023_0.pdf","page":51,"checklist":"ARCS-RFS-02-06M Roof Inspection - Shingle Type"},{"task":"Check for wrinkles, buckles and soft spots","frequency":"P6M","reference":"Public Buildings Service Preventive Maintenance Guide (Public Buildings Maintenance Standards)","url":"https://web.archive.org/web/20231003141600/https://origin-www.gsa.gov/system/files/GSA%20PBS%20Preventive%20Maintenance%20Guide%202022-01302023_0.pdf","page":51,"checklist":"ARCS-RFS-02-06M Roof Inspection - Shingle Type"},{"task":"Check flashing for wind damage, missing caulking and loose fasteners","frequency":"P6M","reference":"Public Buildings Service Preventive Maintenance Guide (Public Buildings Maintenance Standards)","url":"https://web.archive.org/web/20231003141600/https://origin-www.gsa.gov/system/files/GSA%20PBS%20Preventive%20Maintenance%20Guide%202022-01302023_0.pdf","page":51,"checklist":"ARCS-RFS-02-06M Roof Inspection - Shingle Type"},{"task":"Check roof-to-wall and expansion joints","frequency":"P6M","reference":"Public Buildings Service Preventive Maintenance Guide (Public Buildings Maintenance Standards)","url":"https://web.archive.org/web/20231003141600/https://origin-www.gsa.gov/system/files/GSA%20PBS%20Preventive%20Maintenance%20Guide%202022-01302023_0.pdf","page":52,"checklist":"ARCS-RFS-02-06M Roof Inspection - Shingle Type"},{"task":"Check coping for rust, open seams and cracks","frequency":"P6M","reference":"Public Buildings Service Preventive Maintenance Guide (Public Buildings Maintenance Standards)","url":"https://web.archive.org/web/20231003141600/https://origin-www.gsa.gov/system/files/GSA%20PBS%20Preventive%20Maintenance%20Guide%202022-01302023_0.pdf","page":52,"checklist":"ARCS-RFS-02-06M Roof Inspection - Shingle Type"},{"task":"Check rooftop equipment is supported, flashed and secured","frequency":"P6M","reference":"Public Buildings Service Preventive Maintenance Guide (Public Buildings Maintenance Standards)","url":"https://web.archive.org/web/20231003141600/https://origin-www.gsa.gov/system/files/GSA%20PBS%20Preventive%20Maintenance%20Guide%202022-01302023_0.pdf","page":52,"checklist":"ARCS-RFS-02-06M Roof Inspection - Shingle Type"},{"task":"Remove trash and loose material from roof","frequency":"P6M","reference":"Public Buildings Service Preventive Maintenance Guide (Public Buildings Maintenance Standards)","url":"https://web.archive.org/web/20231003141600/https://origin-www.gsa.gov/system/files/GSA%20PBS%20Preventive%20Maintenance%20Guide%202022-01302023_0.pdf","page":52,"checklist":"ARCS-RFS-02-06M Roof Inspection - Shingle Type"},{"task":"Check gutters, roof drains and downspouts are attached, sealed and clear","frequency":"P1Y","reference":"Public Buildings Service Preventive Maintenance Guide (Public Buildings Maintenance Standards)","url":"https://web.archive.org/web/20231003141600/https://origin-www.gsa.gov/system/files/GSA%20PBS%20Preventive%20Maintenance%20Guide%202022-01302023_0.pdf","page":547,"checklist":"PLMB-DRN-01-01Y Roof Drains, Downspout, and Gutter Inspection"},{"task":"Check drain grates, strainers and screens; replace missing ones","frequency":"P1Y","reference":"Public Buildings Service Preventive Maintenance Guide (Public Buildings Maintenance Standards)","url":"https://web.archive.org/web/20231003141600/https://origin-www.gsa.gov/system/files/GSA%20PBS%20Preventive%20Maintenance%20Guide%202022-01302023_0.pdf","page":547,"checklist":"PLMB-DRN-01-01Y Roof Drains, Downspout, and Gutter Inspection"},{"task":"Test downspout heaters, if fitted","frequency":"P1Y","reference":"Public Buildings Service Preventive Maintenance Guide (Public Buildings Maintenance Standards)","url":"https://web.archive.org/web/20231003141600/https://origin-www.gsa.gov/system/files/GSA%20PBS%20Preventive%20Maintenance%20Guide%202022-01302023_0.pdf","page":547,"checklist":"PLMB-DRN-01-01Y Roof Drains, Downspout, and Gutter Inspection"},{"task":"Check for scouring where downspouts discharge onto lower roofs","frequency":"P1Y","reference":"Public Buildings Service Preventive Maintenance Guide (Public Buildings Maintenance Standards)","url":"https://web.archive.org/web/20231003141600/https://origin-www.gsa.gov/system/files/GSA%20PBS%20Preventive%20Maintenance%20Guide%202022-01302023_0.pdf","page":547,"checklist":"PLMB-DRN-01-01Y Roof Drains, Downspout, and Gutter Inspection"}],"basis":[{"type":"public_document","life_type":"planning","title":"CNA e-Tool Estimated Useful Life Table","by":"U.S. Department of Housing and Urban Development","url":"https://www.hud.gov/sites/documents/eul_for_cna_e_tool.pdf","page":8,"code":"HUD CNA 3.3.4.1.1","label":"Asphalt Shingle","years":20,"note":"Same life for family and elderly properties. US multifamily housing."},{"type":"public_document","life_type":"accounting","title":"The Blue Mountains: POL.COR.19.04 Tangible Capital Assets Policy","url":"https://www.thebluemountains.ca/sites/default/files/2022-01/POL-COR-19-04-Tangible-Capital-Assets-Policy.pdf","page":11,"years":25,"note":"Capital asset policy (amortization period). Approved on text check: the label and value were found on the cited page."},{"type":"public_document","life_type":"accounting","title":"Grey Highlands: By-law No. 2026-052, Tangible Capital Asset Policy A09-F-03","url":"https://greyhighlands.civicweb.net/document/406218/","page":11,"years":20,"note":"Capital asset policy (amortization period). Approved on text check: the label and value were found on the cited page."},{"type":"public_document","life_type":"accounting","title":"Meaford: By-law 2020-83, Tangible Capital Asset Policy, Appendix A Estimated Useful Lives","url":"https://meaford.civicweb.net/document/103944/","page":17,"years":25,"note":"Capital asset policy (amortization period). Approved on text check: the label and value were found on the cited page."},{"type":"public_document","life_type":"accounting","title":"Parksville: Policy No. 6.16 Tangible Capital Assets","url":"https://parksville.civicweb.net/document/27036","page":9,"years":25,"note":"Capital asset policy (amortization period). Approved on text check: the label and value were found on the cited page."}],"confidence":{"grade":"B","sample_size":null},"open_questions":["HUD gives planning lives for US multifamily housing; the municipal rows are Ontario accounting lives. Neither is observed replacement data.","Written for GSA contracted O&M in US federal buildings; job plans are generic and defer to manufacturer instructions, and the fire extinguisher plans only point to NFPA 10."],"contributors":["unfinished.one editors"],"last_reviewed":"2026-10-22","canonical_url":"https://unfinished.one/c/roof-asphalt-shingle","versioned_url":"https://unfinished.one/c/roof-asphalt-shingle/v/0.5.0","licence":"CC-BY-4.0","citation":"unfinished.one (2026). Roof, asphalt shingles, v0.5.0. https://unfinished.one/c/roof-asphalt-shingle/v/0.5.0"}