Half of the 3,968 homes in Collingdale were built before 1951. 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.
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.
Permit
Under 34 Pa. Code § 403.1(b)(8), alterations to a house that make no structural change are outside the state code. So the borough code office in Collingdale is the one to ask before work starts.
Source: 34 Pa. Code § 403.1(b)
Layers
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). With 92% of Collingdale’s homes were built before 1980, ask what is under the newest layer.
Ice barrier
The code requires an ice barrier where the local climate table (Table R301.2) says so, and each Pennsylvania municipality fills that table in. The contractor or the borough code office in Collingdale will know.
Rules as read on October 24, 2026. Everything else the state requires: roof replacement in Pennsylvania.
Of 3,739 occupied homes in Collingdale, 2,184 (58%) are owner-occupied. By year built, 37% before 1940, 77% before 1960, 92% before 1980; 2% went up in 2000 or later. (ACS 2020–2024.)
By building type: 19% detached houses, 57% attached single-family houses (rowhouses, twins and townhouses), 23% buildings of two to four units.
With 57% 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 48 Delaware County municipalities on this site, Collingdale has the 9th largest share of homes built before 1980: 92%, against a county range of 20% to 98%.
ZIP codes: 19023
| Place | Median built | Before 1980 | Owners | Row, twin | Hail days |
|---|---|---|---|---|---|
| Collingdale | 1951 | 92% | 58% | 57% | 15 |
| Sharon Hill | 1954 | 83% | 58% | 63% | 15 |
| Aldan | 1954 | 84% | 74% | 25% | 15 |
| Darby Borough | 1949 | 93% | 50% | 64% | 15 |
| Glenolden | 1954 | 88% | 77% | 29% | 17 |
| Colwyn | 1951 | 82% | 45% | 61% | 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.
Within 10 miles of Collingdale, hail of an inch or more was reported on 15 days between 2006 and 2025, the biggest stones 1.75 in on June 24, 2010. The most recent was April 4, 2025.
Federal major-disaster declarations for storms in Delaware County since 2006: 3, most recently DR-4618, Remnants of Hurricane Ida, declared September 2021. (OpenFEMA.)
A report says hail fell near Collingdale, not that it damaged a roof. When wind or hail damage means a new roof.
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; 19% 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; 37% 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 (57% of homes here are attached) | Where the roof meets a wall or parapet |
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 Collingdale and look it up.
The price side is in what a new roof costs in Pennsylvania; the paperwork side in checking a roofing contractor.
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. So the borough code office in Collingdale is the one to ask before work starts.
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). With 92% of Collingdale’s homes were built before 1980, ask what is under the newest layer.
By the Census Bureau’s American Community Survey (2020–2024), the median home in Collingdale was built in 1951, 92% of homes were built before 1980, 58% are owner-occupied.
Hail of 1 inch or larger was reported on 15 days within 10 miles of Collingdale from 2006 through 2025 (NOAA Storm Prediction Center). A report means hail fell nearby, not that a roof was damaged.
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 Collingdale and look it up.
The full list: before you call.
Checked October 24, 2026. Laws and code editions change; the date says when these were last read at the source.