Half of the 4,519 homes in Lehigh Township were built before 1979. What the code requires when that roof is replaced, and who signs off, is below.
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
Under 34 Pa. Code § 403.1(b)(8), alterations to a house that make no structural change are outside the state code. So the township code office in Lehigh Township is the one to ask before work starts.
Source: 34 Pa. Code § 403.1(b)
Layers
A new roof may go over one existing layer; with two or more, or over slate, clay or cement tile, everything comes off to the deck (IRC R908.3.1.1). With 51% of Lehigh 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. Ask the township code office or the contractor what Lehigh Township’s says.
Rules as read on October 24, 2026. Code edition, permit and contract rules for the whole state: roof replacement in Pennsylvania.
Owners live in 4,041 of Lehigh Township’s occupied homes, or 94%. By year built, 9% before 1940, 27% before 1960, 51% before 1980; 22% went up in 2000 or later. (ACS 2020–2024.)
By building type: 82% detached houses, 3% attached single-family houses (rowhouses, twins and townhouses), 14% manufactured homes.
Of the 34 Northampton County municipalities on this site, Lehigh Township has the 21st largest share of homes built before 1980: 51%, against a county range of 20% to 91%.
ZIP codes: 18035 · 18038 · 18067 · 18086 · 18088
| Place | Median built | Before 1980 | Owners | Row, twin | Hail days |
|---|---|---|---|---|---|
| Lehigh Township, Northampton County | 1979 | 51% | 94% | 3% | 18 |
| Walnutport | 1962 | 75% | 74% | 29% | 18 |
| Slatington | 1938 | 90% | 59% | 29% | 18 |
| Lower Towamensing | 1968 | 65% | 79% | 3% | 12 |
| Palmerton | 1947 | 79% | 58% | 24% | 13 |
| Allen | 2001 | 36% | 81% | 32% | 23 |
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 Lehigh Township, hail of an inch or more was reported on 18 days between 2006 and 2025, the biggest stones 2.75 in on August 17, 2007. The most recent was May 6, 2025.
That is more hail days than 85% of the places in the state on this site.
Federal major-disaster declarations for storms in Northampton County since 2006: 6, most recently DR-4618, Remnants of Hurricane Ida, declared September 2021. (OpenFEMA.)
A report says hail fell near Lehigh Township, not that it damaged a 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; 82% 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 | Roofs that will carry solar later | Standing seam that carries its own loads can skip the tear-off (R908.3.1) |
| Slate | 75 years | Older houses; 9% here predate 1940 | Never a base for a new layer (R908.3.1.1); heavy |
| Flat roof: EPDM or TPO | 15 years | Porches, additions, low-slope rears | Where the roof meets a wall or parapet |
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 Lehigh 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.
Lehigh Township’s ordinance decides. Under 34 Pa. Code § 403.1(b)(8), alterations to a house that make no structural change are outside the state code. So the township code office in Lehigh Township is the one to ask before work starts.
A new roof may go over one existing layer; with two or more, or over slate, clay or cement tile, everything comes off to the deck (IRC R908.3.1.1). With 51% of Lehigh 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 Lehigh Township was built in 1979, 51% of homes were built before 1980, 94% are owner-occupied.
Hail of 1 inch or larger was reported on 18 days within 10 miles of Lehigh 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 Lehigh 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.