Conshohocken, Pennsylvania

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Repair or replace

Feature Slate roofs

The Park Service gives Pennsylvania slate a life of more than 60 years to at least 200, depending on the quarry

Soft-vein slate lasts more than 60 years and Peach Bottom slate at least 200, so a slate roof laid in 1925 can be worn out or have a century left.

200 Years, Peach Bottom · +14.3% on the period

Peach Bottom slate is given at least 200 years and soft-vein slate more than 60

Expected life of a slate roof by the slate's source, years

Peach Bottom slate is given at least 200 years and soft-vein slate more than 60Bar chart with 5 points from Pennsylvania soft-vein to Peach Bottom, in Years. Series: Life span (years). Values range from 0 to 200.050100150200Pennsylvania soft-veinPennsylvania hard-veinVermont and New YorkBuckingham VirginiaPeach BottomPennsylvania soft-vein: 60Pennsylvania hard-vein: 100Vermont and New York: 125Buckingham Virginia: 175Peach Bottom: 200200
Peach Bottom slate is given at least 200 years and soft-vein slate more than 60Bar chart with 5 points from Pennsylvania soft-vein to Peach Bottom, in Years. Series: Life span (years). Values range from 0 to 200.0100200Pennsylvania soft-veinVermont and New YorkPeach BottomPennsylvania soft-vein: 60Pennsylvania hard-vein: 100Vermont and New York: 125Buckingham Virginia: 175Peach Bottom: 200200
National Park Service, Preservation Brief 29 (1993). The brief gives soft-vein slate more than 60 years, hard-vein roughly 100, Vermont and New York about 125, Buckingham 175 or more and Peach Bottom at least 200, and calls the figures a general guide. Source: nps.gov

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Guide notesThe Park Service gives Pennsylvania slate a life of more than 60 years to at least 200, depending on the quarry FeatureSoft-vein slate lasts more than 60 years and Peach Bottom slate at least 200, so a slate roof laid in 1925 can be worn out or have a century left.