Union Township has 1,269 homes, and half of them were standing by 1984. The rules below decide how much of the old roof has to come off and what goes under the new one.
New Roofing Costs connects homeowners with independent local roofing contractors. We do not perform roofing work.
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)). Whether Union Township wants a permit is in its own ordinance; ask the township code office before the old roof comes off.
Source: 34 Pa. Code § 403.1(b)
Layers
On a roof that already carries two layers, or slate or tile, the code allows no recover: it is a tear-off (IRC R908.3.1.1). 41% of Union Township’s homes were built before 1980, so count the layers before comparing quotes.
Ice barrier
The code requires an ice barrier where the local climate table (Table R301.2) says so, and each Pennsylvania municipality fills that table in. The contractor or the township code office in Union Township will know.
Rules as read on October 24, 2026. Everything else the state requires: roof replacement in Pennsylvania.
Of 1,236 occupied homes in Union Township, 1,115 (90%) are owner-occupied. By year built, 8% before 1940, 14% before 1960, 41% before 1980; 15% went up in 2000 or later. (ACS 2020–2024.)
By building type: 98% detached houses.
Of the 28 Adams County municipalities on this site, Union Township has the 22nd largest share of homes built before 1980: 41%, against a county range of 26% to 87%.
ZIP codes: 17340
| Place | Median built | Before 1980 | Owners | Row, twin | Hail days |
|---|---|---|---|---|---|
| Union Township, Adams County | 1984 | 41% | 90% | 0% | 18 |
| Littlestown | 1966 | 54% | 72% | 19% | 19 |
| Conewago Township, Adams County | 1989 | 37% | 87% | 21% | 17 |
| Germany | 1983 | 47% | 94% | 3% | 17 |
| McSherrystown | 1973 | 70% | 48% | 22% | 18 |
| Hanover Borough | 1956 | 77% | 53% | 22% | 18 |
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.
Since 2006 the National Weather Service has logged hail of 1 inch or larger on 18 separate days within 10 miles of Union Township; the largest was 1.75 in on September 21, 2024. The most recent was March 16, 2025.
That is more hail days than 85% of the places in the state on this site.
Federal major-disaster declarations for storms in Adams County since 2006: 3, most recently DR-4267, Severe Winter Storm and Snowstorm, declared March 2016. (OpenFEMA.)
A report says hail fell near Union Township, not that it damaged a roof. When wind or hail damage means a new roof.
Useful life is HUD’s planning figure, not a warranty. 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; 98% 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 | Low pitches and long runs | Standing seam that carries its own loads can skip the tear-off (R908.3.1) |
| Slate | 75 years | Older houses; 8% here predate 1940 | Sound slate can be reused (R908.5); broken slate cannot |
| Flat roof: EPDM or TPO | 15 years | Porches, additions, low-slope rears | Coating is not a replacement |
Pennsylvania’s home improvement law (HICPA § 3, § 6) requires registration with the Attorney General from $5,000 a year of such work and puts the number on every estimate; ask for it in Union Township and look it up.
The price side is in what a new roof costs in Pennsylvania; the paperwork side in checking a roofing contractor.
Local ordinance, not the state. The state code does not cover a reroof that changes no structure (34 Pa. Code § 403.1(b)(8)). Whether Union Township wants a permit is in its own ordinance; ask the township code office before the old roof comes off.
On a roof that already carries two layers, or slate or tile, the code allows no recover: it is a tear-off (IRC R908.3.1.1). 41% of Union Township’s homes were built before 1980, so count the layers before comparing quotes.
By the Census Bureau’s American Community Survey (2020–2024), the median home in Union Township was built in 1984, 41% of homes were built before 1980, 90% are owner-occupied.
Hail of 1 inch or larger was reported on 18 days within 10 miles of Union Township from 2006 through 2025 (NOAA Storm Prediction Center). A report means hail fell nearby, not that a roof was damaged.
Pennsylvania’s home improvement law (HICPA § 3, § 6) requires registration with the Attorney General from $5,000 a year of such work and puts the number on every estimate; ask for it in Union Township and look it up.
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.