Permit
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 Porter Township is the one to ask before work starts.
Source: 34 Pa. Code § 403.1(b)
Porter Township has 697 homes, and half of them were standing by 1977. Below: what the code asks of a replacement here, the permit, and the town’s own records.
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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 Porter Township is the one to ask before work starts.
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). 58% of Porter Township’s homes were built before 1980; many have been reroofed before.
Ice barrier
Whether an eave membrane is a code item depends on the climate table the municipality filled in when it adopted the code (IRC R905.1.2, Table R301.2). The contractor or the township code office in Porter Township will know.
Checked against the code text on October 24, 2026. The state’s code edition and the rest of its rules: roof replacement in Pennsylvania.
Of 641 occupied homes in Porter Township, 521 (81%) are owner-occupied. Counting by decade, 16% before 1940, 23% before 1960, 58% before 1980 of the housing was in place, and 18% dates from 2000 on. (ACS 2020–2024.)
The housing is 83% detached houses, 6% manufactured homes.
Of the 26 Lycoming County municipalities on this site, Porter Township has the 18th largest share of homes built before 1980: 58%, against a county range of 42% to 93%.
| Place | Median built | Before 1980 | Owners | Row, twin | Hail days |
|---|---|---|---|---|---|
| Porter Township, Lycoming County | 1977 | 58% | 81% | 2% | 5 |
| Jersey Shore | 1938 | 93% | 70% | 2% | 6 |
| Pine Creek | 1974 | 59% | 98% | 3% | 5 |
| Mifflin Township, Lycoming County | 1985 | 42% | 78% | 1% | 3 |
| Woodward | 1981 | 48% | 84% | 1% | 9 |
| Susquehanna Township, Lycoming County | 1971 | 71% | 92% | 0% | 9 |
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 5 separate days within 10 miles of Porter Township; the largest was 3 in on May 28, 2019.
That is fewer than most places in the state on this site (median 12 days).
At the county level, Porter Township shares Lycoming County’s record of 3 storm disaster declarations since 2006, the newest DR-4815 (Tropical Storm Debby, September 2024). (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 | Low pitches and long runs | A complete standing-seam system may go over the old roof (R908.3.1) |
| Slate | 75 years | Older houses; 16% here predate 1940 | Never a base for a new layer (R908.3.1.1); heavy |
| Flat roof: EPDM or TPO | 15 years | Additions and porch roofs | Seams at walls and drainage |
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 Porter Township and look it up.
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 Porter Township is the one to ask before work starts.
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). 58% of Porter Township’s homes were built before 1980; many have been reroofed before.
By the Census Bureau’s American Community Survey (2020–2024), the median home in Porter Township was built in 1977, 58% of homes were built before 1980, 81% are owner-occupied.
Hail of 1 inch or larger was reported on 5 days within 10 miles of Porter 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 Porter 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.