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 Warwick Township is the one to ask before work starts.
Source: 34 Pa. Code § 403.1(b)
Roof Replacement in Warwick Township, Lancaster County, PA
Half of the 7,480 homes in Warwick Township were built before 1991. 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.
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.
The rules for a reroof in Warwick Township
Layers
One old layer can stay; two cannot
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). 27% of Warwick Township’s homes were built before 1980, so count the layers before comparing quotes.
Ice barrier
Warwick Township’s climate table decides
The code requires an ice barrier where the local climate table (Table R301.2) says so, and each Pennsylvania municipality fills that table in. Ask the township code office or the contractor what Warwick Township’s says.
Rules as read on October 24, 2026. Everything else the state requires: roof replacement in Pennsylvania.
Homes and roofs in Warwick Township
Of 7,362 occupied homes in Warwick Township, 5,804 (79%) are owner-occupied. By year built, 9% before 1940, 14% before 1960, 27% before 1980; 26% went up in 2000 or later. (ACS 2020–2024.)
By building type: 60% detached houses, 23% attached single-family houses (rowhouses, twins and townhouses), 3% manufactured homes.
Of the 59 Lancaster County municipalities on this site, Warwick Township has the smallest share of homes built before 1980: 27%, against a county range of 27% to 87%.
ZIP codes: 17543
Warwick Township and the towns around it
| Place | Median built | Before 1980 | Owners | Row, twin | Hail days |
|---|---|---|---|---|---|
| Warwick Township, Lancaster County | 1991 | 27% | 79% | 23% | 22 |
| Lititz | 1962 | 68% | 64% | 29% | 20 |
| Akron | 1971 | 72% | 63% | 11% | 24 |
| Manheim Township, Lancaster County | 1979 | 51% | 71% | 17% | 26 |
| Elizabeth | 1974 | 59% | 86% | 4% | 16 |
| East Petersburg | 1964 | 79% | 92% | 24% | 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.
Storm record around Warwick Township
Within 10 miles of Warwick Township, hail of an inch or more was reported on 22 days between 2006 and 2025, the biggest stones 1.75 in on June 10, 2008. The most recent was July 16, 2024.
That is more hail days than 96% of the places in the state on this site.
Severe Winter Storm and Snowstorm (DR-4267, March 2016) is the latest of 3 federal storm declarations covering Lancaster County since 2006. (OpenFEMA.)
A report says hail fell near Warwick Township, not that it damaged a roof. When wind or hail damage means a new roof.
What goes on the roof next
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; 60% 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 | Can’t be roofed over; check the framing for the weight |
| Flat roof: EPDM or TPO | 15 years | Low-slope roofs and rear sections (23% of homes here are attached) | Coating is not a replacement |
Checking a contractor in Pennsylvania
Before signing for a roof in Warwick Township, 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).
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 Warwick Township
Does a roof replacement in Warwick Township need a 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 Warwick Township is the one to ask before work starts.
Can a new roof go over the old one in Warwick Township?
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). 27% of Warwick Township’s homes were built before 1980, so count the layers before comparing quotes.
How old are the houses in Warwick Township?
By the Census Bureau’s American Community Survey (2020–2024), the median home in Warwick Township was built in 1991, 27% of homes were built before 1980, 79% are owner-occupied.
How many hail days has Warwick Township had?
Hail of 1 inch or larger was reported on 22 days within 10 miles of Warwick Township 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 Warwick Township?
Before signing for a roof in Warwick Township, 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).
What they will ask on the phone
- Your address or ZIP code in Warwick Township
- How many stories the house has, and whether it is detached or attached
- The roof you have today, shingle, metal, slate, tile or flat, and its rough age
- The number of layers, if anyone has counted
- Your timing for a complete replacement
- Any historic-district or HOA rules on the house in Warwick Township
- That you own the home and decide on the roof
The full list: before you call.