{"id":"roof-epdm","version":"0.2.0","classification":{"uniformat":"B3010"},"names":["Roof, EPDM single-ply"],"aliases":["EPDM","rubber roof"],"service_life":{"median_years":17.5,"range_years":[15,20],"range_basis":"source_spread"},"pm_tasks":[{"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 3.3.4.2.3","label":"Low slope-Adhered rubber membrane, (EPDM)","years":15,"note":"Same life for family and elderly properties. US multifamily housing. HUD's row is for adhered EPDM."},{"type":"public_document","life_type":"accounting","title":"Trent Lakes: 5.17 Capital Asset Policy","url":"https://www.trentlakes.ca/media/fjaduus0/517_capital-asset-policy.pdf","page":10,"label":"Roofing - EPDM","years":20,"note":"Capital asset policy (amortization period). Approved on text check: the label and value were found on the cited page."}],"confidence":{"grade":"C","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-epdm","versioned_url":"https://unfinished.one/c/roof-epdm/v/0.2.0","licence":"CC-BY-4.0","citation":"unfinished.one (2026). Roof, EPDM single-ply, v0.2.0. https://unfinished.one/c/roof-epdm/v/0.2.0"}