Roof Replacement in Gregg, PA

The median home in Gregg was built in 1972; there are 295 of them. Below: what the code asks of a replacement here, the permit, and the town’s own records.

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 Gregg

Permit

Ask Gregg first

Pennsylvania’s code leaves residential alterations without structural change to local ordinance (34 Pa. Code § 403.1(b)(8)). The township code office can say what Gregg requires.

Source: 34 Pa. Code § 403.1(b)

Layers

One old layer can stay; two cannot

IRC R908.3.1.1 forbids roofing over two existing layers, over slate or tile, or over a water-soaked roof. 68% of Gregg’s homes were built before 1980; many have been reroofed before.

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

Ice barrier

Gregg’s climate table decides

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 Gregg’s says.

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

Rules as read on October 24, 2026. Code edition, permit and contract rules for the whole state: roof replacement in Pennsylvania.

Homes and roofs in Gregg

Owners live in 212 of Gregg’s occupied homes, or 80%. By year built, 28% before 1940, 39% before 1960, 68% before 1980; 13% went up in 2000 or later. (ACS 2020–2024.)

By building type: 80% detached houses, 5% attached single-family houses (rowhouses, twins and townhouses), 14% manufactured homes.

Of the 12 Union County municipalities on this site, Gregg has the 3rd largest share of homes built before 1980: 68%, against a county range of 35% to 90%.

ZIP codes: 17810

Gregg and the towns around it

Place	Median built	Before 1980	Owners	Row, twin	Hail days
Gregg	1972	68%	80%	5%	12
Watsontown	1952	87%	54%	11%	9
White Deer	1979	52%	92%	3%	7
Delaware Township, Northumberland County	1979	52%	88%	1%	10
Montgomery Borough	1938	90%	65%	4%	13
Washington Township, Lycoming County	1978	58%	90%	1%	5

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.

Storm record around Gregg

NOAA’s storm reports show 12 days since 2006 with hail of at least 1 inch inside a 10-mile circle around Gregg, topping out at 1.75 in on July 18, 2016. The most recent was July 24, 2023.

Federal major-disaster declarations for storms in Union County since 2006: 1, most recently DR-4815, Tropical Storm Debby, declared September 2024. (OpenFEMA.)

A report says hail fell near Gregg, not that it damaged a roof. When wind or hail damage means a new roof.

What goes on the roof next

HUD’s useful-life figures are for planning; a warranty is a separate promise. For Gregg’s houses: 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; 80% 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	Standing seam that carries its own loads can skip the tear-off (R908.3.1)
Slate	75 years	Older houses; 28% 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

Checking a contractor in Pennsylvania

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 Gregg, and search it.

The price side is in what a new roof costs in Pennsylvania; the paperwork side in checking a roofing contractor.

Questions about a new roof in Gregg

Does a roof replacement in Gregg need a permit?

Ask Gregg first. Pennsylvania’s code leaves residential alterations without structural change to local ordinance (34 Pa. Code § 403.1(b)(8)). The township code office can say what Gregg requires.

Is a roof-over allowed in Gregg, or is it a tear-off?

IRC R908.3.1.1 forbids roofing over two existing layers, over slate or tile, or over a water-soaked roof. 68% of Gregg’s homes were built before 1980; many have been reroofed before.

How old are the houses in Gregg?

By the Census Bureau’s American Community Survey (2020–2024), the median home in Gregg was built in 1972, 68% of homes were built before 1980, 80% are owner-occupied.

How many hail days has Gregg had?

Hail of 1 inch or larger was reported on 12 days within 10 miles of Gregg from 2006 through 2025 (NOAA Storm Prediction Center). A report means hail fell nearby, not that a roof was damaged.

How do I check a roofing contractor in Gregg?

What they will ask on the phone

Your address or ZIP code in Gregg
The number of stories, and whether the house stands alone
What covers the roof now and about when it went on
How many layers are on it, if you know
That the job is a full replacement or a new roof, and your timing
Any historic-district or HOA rules on the house in Gregg
That you own the home and decide on the roof

The full list: before you call.