The median home in Shrewsbury Township was built in 1983; there are 2,802 of them. What the code requires when that roof is replaced, and who signs off, is below.
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This number connects homeowners who are planning a new roof or a full roof replacement with independent local roofing contractors. It is not for leak repairs or patch jobs. The call must come from the homeowner who decides on the roof. Calls may be recorded.
Permit
The state code does not cover a reroof that changes no structure (34 Pa. Code § 403.1(b)(8)). So the township code office in Shrewsbury Township is the one to ask before work starts.
Source: 34 Pa. Code § 403.1(b)
Layers
IRC R908.3.1.1 forbids roofing over two existing layers, over slate or tile, or over a water-soaked roof. With 45% of Shrewsbury Township’s homes were built before 1980, ask what is under the newest layer.
Ice barrier
IRC R905.1.2 calls for an ice barrier where Table R301.2 says so; in Pennsylvania the municipality completes that table. Shrewsbury Township’s answer is with the township code office.
Checked against the code text on October 24, 2026. Code edition, permit and contract rules for the whole state: roof replacement in Pennsylvania.
Of 2,685 occupied homes in Shrewsbury Township, 2,314 (86%) are owner-occupied. Counting by decade, 7% before 1940, 14% before 1960, 45% before 1980 of the housing was in place, and 24% dates from 2000 on. (ACS 2020–2024.)
The housing is 83% detached houses, 8% attached single-family houses (rowhouses, twins and townhouses), 4% manufactured homes.
Of the 57 York County municipalities on this site, Shrewsbury Township has the 36th largest share of homes built before 1980: 45%, against a county range of 25% to 98%.
ZIP codes: 17327 · 17349 · 17361
| Place | Median built | Before 1980 | Owners | Row, twin | Hail days |
|---|---|---|---|---|---|
| Shrewsbury Township | 1983 | 45% | 86% | 8% | 13 |
| New Freedom | 1989 | 25% | 91% | 10% | 12 |
| Shrewsbury Borough | 1986 | 38% | 80% | 8% | 14 |
| Glen Rock | 1955 | 71% | 55% | 16% | 14 |
| Codorus | 1975 | 65% | 85% | 3% | 13 |
| Springfield Township, York County | 1987 | 38% | 91% | 14% | 16 |
Median built: median year the homes were built. Before 1980: share of homes built then. Owners: share of homes that are owner-occupied. Row, twin: share of homes that are rowhouses, twins or townhouses. Census ACS 2020–2024. Hail days: days with hail of 1 inch or larger within 10 miles, 2006–2025, NOAA Storm Prediction Center.
Within 10 miles of Shrewsbury Township, hail of an inch or more was reported on 13 days between 2006 and 2025, the biggest stones 2 in on August 2, 2008. The most recent was April 15, 2024.
At the county level, Shrewsbury Township shares York County’s record of 3 storm disaster declarations since 2006, the newest DR-4618 (Remnants of Hurricane Ida, September 2021). (OpenFEMA.)
Storm reports are what observers logged, not a measure of damage to any roof. When wind or hail damage means a new roof.
Lifespans come from HUD’s capital-needs table, not from a brochure. More in the guides to shingles, metal, slate and flat roofs.
| Material | HUD useful life | Fits a house like | Watch for |
|---|---|---|---|
| Asphalt shingles | 20 years | Most pitched roofs; 83% of homes here are detached | Wind class set by the design wind speed (IRC Table R905.2.4.1) |
| Metal (standing seam, panels) | 50 years | Simple roofs with long, unbroken slopes | A complete standing-seam system may go over the old roof (R908.3.1) |
| Slate | 75 years | Older houses; 7% here predate 1940 | Sound slate can be reused (R908.5); broken slate cannot |
| Flat roof: EPDM or TPO | 15 years | Additions and porch roofs | Where the roof meets a wall or parapet |
A contractor who does $5,000 or more of home improvement work a year must be registered with the Pennsylvania Attorney General, and the number has to be on every contract and estimate (HICPA § 3, § 6). Ask for it before anyone starts on a roof in Shrewsbury Township, and search it.
Contracts, deposits and the right to cancel: checking a roofing contractor. What moves the price: new roof cost in Pennsylvania.
Local ordinance, not the state. The state code does not cover a reroof that changes no structure (34 Pa. Code § 403.1(b)(8)). So the township code office in Shrewsbury Township is the one to ask before work starts.
IRC R908.3.1.1 forbids roofing over two existing layers, over slate or tile, or over a water-soaked roof. With 45% of Shrewsbury Township’s homes were built before 1980, ask what is under the newest layer.
By the Census Bureau’s American Community Survey (2020–2024), the median home in Shrewsbury Township was built in 1983, 45% of homes were built before 1980, 86% are owner-occupied.
Hail of 1 inch or larger was reported on 13 days within 10 miles of Shrewsbury Township from 2006 through 2025 (NOAA Storm Prediction Center). A report means hail fell nearby, not that a roof was damaged.
A contractor who does $5,000 or more of home improvement work a year must be registered with the Pennsylvania Attorney General, and the number has to be on every contract and estimate (HICPA § 3, § 6). Ask for it before anyone starts on a roof in Shrewsbury Township, and search it.
The full list: before you call.
Checked October 24, 2026. Laws and code editions change; the date says when these were last read at the source.