Permit
Columbia’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. The borough code office can say what Columbia requires.
Source: 34 Pa. Code § 403.1(b)
Roof Replacement in Columbia, PA
Half of the 4,936 homes in Columbia were built before 1938. 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 Columbia
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). 85% of Columbia’s homes were built before 1980, so count the layers before comparing quotes.
Ice barrier
Columbia’s climate table decides
Whether an eave membrane is a code item depends on the climate table the municipality filled in when it adopted the code (IRC R905.1.2, Table R301.2). The contractor or the borough code office in Columbia will know.
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 Columbia
Owners live in 2,411 of Columbia’s occupied homes, or 53%. By year built, 52% before 1940, 69% before 1960, 85% before 1980; 2% went up in 2000 or later. (ACS 2020–2024.)
By building type: 30% detached houses, 31% attached single-family houses (rowhouses, twins and townhouses), 18% buildings of two to four units.
With about one in three of homes attached, many roofs here meet a neighbor’s roof at a party wall. Say so on the call, and ask the contractor how the new roof will be tied in where it meets the house next door.
On a house built before 1940, ask what the deck is (boards or plywood) and whether slate sits under the later layers: slate can’t be roofed over.
Of the 59 Lancaster County municipalities on this site, Columbia has the 3rd largest share of homes built before 1980: 85%, against a county range of 27% to 87%.
Columbia and the towns around it
| Place | Median built | Before 1980 | Owners | Row, twin | Hail days |
|---|---|---|---|---|---|
| Columbia | 1938 | 85% | 53% | 31% | 17 |
| West Hempfield | 1985 | 36% | 86% | 13% | 22 |
| Wrightsville | 1944 | 86% | 68% | 23% | 19 |
| Mountville | 1982 | 44% | 77% | 39% | 22 |
| Marietta | 1938 | 82% | 62% | 36% | 17 |
| East Donegal | 1994 | 31% | 77% | 24% | 16 |
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 Columbia
Within 10 miles of Columbia, hail of an inch or more was reported on 17 days between 2006 and 2025, the biggest stones 2 in on May 14, 2010. The most recent was June 28, 2025.
That is more hail days than 79% 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 Columbia, 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; 30% 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; 52% 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 (31% of homes here are attached) | 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 Columbia, 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 Columbia
Does a roof replacement in Columbia need a permit?
Columbia’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. The borough code office can say what Columbia requires.
Can a new roof go over the old one in Columbia?
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). 85% of Columbia’s homes were built before 1980, so count the layers before comparing quotes.
How old are the houses in Columbia?
By the Census Bureau’s American Community Survey (2020–2024), the median home in Columbia was built in 1938, 85% of homes were built before 1980, 53% are owner-occupied.
How many hail days has Columbia had?
Hail of 1 inch or larger was reported on 17 days within 10 miles of Columbia 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 Columbia?
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 Columbia, and search it.
What they will ask on the phone
- The street address in Columbia, or at least the ZIP code
- Detached, twin or rowhouse, and the number of stories
- What covers the roof now and about when it went on
- 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 Columbia
- That you are the owner and the one who decides
The full list: before you call.