Roof Replacement in Bethlehem City, Lehigh County, PA

The median home in Bethlehem City was built in 1957; there are 23,239 of them. 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.

Call (833) 781-1806 Replacement and new roofs only · homeowners

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.

A Pennsylvania stone-and-brick house with a new shingle roof

The rules for a reroof in Bethlehem City

Permit

Ask Bethlehem City first

Under 34 Pa. Code § 403.1(b)(8), alterations to a house that make no structural change are outside the state code. The city code office can say what Bethlehem City requires.

Source: 34 Pa. Code § 403.1(b)

Layers

Two layers means a tear-off

IRC R908.3.1.1 forbids roofing over two existing layers, over slate or tile, or over a water-soaked roof. With 79% of Bethlehem City’s homes were built before 1980, ask what is under the newest layer.

Source: IRC 2021, Chapter 9 (Pennsylvania edition, UpCodes)

Ice barrier

Set by the local climate table

IRC R905.1.2 calls for an ice barrier where Table R301.2 says so; in Pennsylvania the municipality completes that table. Bethlehem City’s answer is with the city code office.

Source: IRC 2021, Chapter 9 (Pennsylvania edition, UpCodes)

Checked against the code text on October 24, 2026. Everything else the state requires: roof replacement in Pennsylvania.

Homes and roofs in Bethlehem City

48% of the occupied homes in Bethlehem City are lived in by their owners: 10,606 households, the people this line is for. Counting by decade, 33% before 1940, 55% before 1960, 79% before 1980 of the housing was in place, and 9% dates from 2000 on. (ACS 2020–2024.)

The housing is 35% detached houses, 30% attached single-family houses (rowhouses, twins and townhouses), 12% buildings of two to four units.

Older houses hide their history: ask the contractor to confirm the deck (board or sheet) and every layer above it before pricing, because slate or two layers mean a full tear-off.

Of the 25 Lehigh County municipalities on this site, Bethlehem City has the 6th largest share of homes built before 1980: 79%, against a county range of 22% to 90%.

ZIP codes: 18018

Bethlehem City and the towns around it

Place	Median built	Before 1980	Owners	Row, twin	Hail days
Bethlehem City, Lehigh County	1957	79%	48%	30%	23
Bethlehem City, Northampton County	1957	79%	48%	30%	23
Freemansburg	1981	49%	56%	44%	26
Fountain Hill	1947	89%	58%	35%	24
Hellertown	1952	87%	67%	18%	22
Lower Saucon	1979	51%	88%	14%	20

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.

Hail and storms near Bethlehem City

Since 2006 the National Weather Service has logged hail of 1 inch or larger on 23 separate days within 10 miles of Bethlehem City; the largest was 2 in on May 29, 2019. The most recent was July 3, 2025.

That is more hail days than 98% of the places in the state on this site.

At the county level, Bethlehem City shares Lehigh County’s record of 2 storm disaster declarations since 2006, the newest DR-4267 (Severe Winter Storm and Snowstorm, March 2016). (OpenFEMA.)

Storm reports are what observers logged, not a measure of damage to any roof. When wind or hail damage means a new roof.

What goes on the roof next

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; 35% 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; 33% here predate 1940	Sound slate can be reused (R908.5); broken slate cannot
Flat roof: EPDM or TPO	15 years	Low-slope roofs and rear sections (30% of homes here are attached)	Where the roof meets a wall or parapet

Checking a contractor in Pennsylvania

Before signing for a roof in Bethlehem City, get the contractor’s PA registration number: the home improvement law requires registration with the Attorney General above $5,000 a year of such work, and the number on contracts and estimates (HICPA § 3, § 6).

Contracts, deposits and the right to cancel: checking a roofing contractor. What moves the price: new roof cost in Pennsylvania.

Questions about a new roof in Bethlehem City

Is a permit required for a new roof in Bethlehem City, PA?

Ask Bethlehem City first. Under 34 Pa. Code § 403.1(b)(8), alterations to a house that make no structural change are outside the state code. The city code office can say what Bethlehem City requires.

Do the old shingles have to come off in Bethlehem City?

When were most homes in Bethlehem City built?

By the Census Bureau’s American Community Survey (2020–2024), the median home in Bethlehem City was built in 1957, 79% of homes were built before 1980, 48% are owner-occupied.

Does Bethlehem City get hail that damages roofs?

Hail of 1 inch or larger was reported on 23 days within 10 miles of Bethlehem City from 2006 through 2025 (NOAA Storm Prediction Center). A report means hail fell nearby, not that a roof was damaged.

What license or registration should a roofer in Bethlehem City have?

What they will ask on the phone

Your address or ZIP code in Bethlehem City
How many stories the house has, and whether it is detached or attached
What covers the roof now and about when it went on
Whether there is one layer or more, if you know
That the job is a full replacement or a new roof, and your timing
Whether the house is in a historic district or an HOA
That you own the home and decide on the roof

The full list: before you call.