Permit
Local ordinance, not the state
Under 34 Pa. Code § 403.1(b)(8), alterations to a house that make no structural change are outside the state code. The township code office can say what West Cornwall requires.
Source: 34 Pa. Code § 403.1(b)
Roof Replacement in West Cornwall, PA
Half of the 962 homes in West Cornwall were built before 1977. 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 West Cornwall
Layers
No third layer
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). 54% of West Cornwall’s homes were built before 1980, so count the layers before comparing quotes.
Ice barrier
West Cornwall’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 West Cornwall’s says.
Rules as read on October 24, 2026. The state’s code edition and the rest of its rules: roof replacement in Pennsylvania.
Homes and roofs in West Cornwall
Of 837 occupied homes in West Cornwall, 759 (91%) are owner-occupied. By year built, 23% before 1940, 39% before 1960, 54% before 1980; 14% went up in 2000 or later. (ACS 2020–2024.)
By building type: 75% detached houses, 12% attached single-family houses (rowhouses, twins and townhouses), 12% manufactured homes.
Of the 23 Lebanon County municipalities on this site, West Cornwall has the 13th largest share of homes built before 1980: 54%, against a county range of 31% to 88%.
ZIP codes: 17064
West Cornwall and the towns around it
| Place | Median built | Before 1980 | Owners | Row, twin | Hail days |
|---|---|---|---|---|---|
| West Cornwall | 1977 | 54% | 91% | 12% | 16 |
| Cornwall | 1986 | 40% | 77% | 22% | 15 |
| North Cornwall | 1980 | 50% | 67% | 23% | 16 |
| South Annville | 1978 | 57% | 91% | 3% | 17 |
| South Lebanon | 1973 | 56% | 77% | 16% | 15 |
| Cleona | 1957 | 68% | 69% | 28% | 17 |
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 West Cornwall
Since 2006 the National Weather Service has logged hail of 1 inch or larger on 16 separate days within 10 miles of West Cornwall; the largest was 1.75 in on March 29, 2009. The most recent was June 30, 2024.
Severe Winter Storm and Snowstorm (DR-4267, March 2016) is the latest of 3 federal storm declarations covering Lebanon County since 2006. (OpenFEMA.)
A report says hail fell near West Cornwall, 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; 75% 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; 23% 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 |
Checking a contractor in Pennsylvania
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 West Cornwall and look it up.
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 West Cornwall
Do I need a permit to replace a roof in West Cornwall?
Local ordinance, not the state. Under 34 Pa. Code § 403.1(b)(8), alterations to a house that make no structural change are outside the state code. The township code office can say what West Cornwall requires.
Do the old shingles have to come off in West Cornwall?
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). 54% of West Cornwall’s homes were built before 1980, so count the layers before comparing quotes.
How old are the houses in West Cornwall?
By the Census Bureau’s American Community Survey (2020–2024), the median home in West Cornwall was built in 1977, 54% of homes were built before 1980, 91% are owner-occupied.
Does West Cornwall get hail that damages roofs?
Hail of 1 inch or larger was reported on 16 days within 10 miles of West Cornwall 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 West Cornwall?
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 West Cornwall and look it up.
What they will ask on the phone
- Where the house is: the West Cornwall address or ZIP
- One story or two (or more), detached or attached
- What is on the roof now (asphalt shingles, metal, slate, tile, or a flat membrane) and roughly how old it is
- Whether there is one layer or more, if you know
- That you want a new roof or a full replacement, and when you want the work done
- Any historic-district or HOA rules on the house in West Cornwall
- That you are the owner and the one who decides
The full list: before you call.