West Conshohocken has 765 homes, and half of them were standing by 1949. What the code requires when that roof is replaced, and who signs off, is below.
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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
Pennsylvania’s code leaves residential alterations without structural change to local ordinance (34 Pa. Code § 403.1(b)(8)). The borough code office can say what West Conshohocken requires.
Source: 34 Pa. Code § 403.1(b)
Layers
On a roof that already carries two layers, or slate or tile, the code allows no recover: it is a tear-off (IRC R908.3.1.1). With 63% of West Conshohocken’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 West Conshohocken will know.
Rules as read on October 24, 2026. Code edition, permit and contract rules for the whole state: roof replacement in Pennsylvania.
Of 728 occupied homes in West Conshohocken, 545 (75%) are owner-occupied. By year built, 46% before 1940, 55% before 1960, 63% before 1980; 23% went up in 2000 or later. (ACS 2020–2024.)
By building type: 40% detached houses, 54% attached single-family houses (rowhouses, twins and townhouses), 6% buildings of two to four units.
With 54% 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 61 Montgomery County municipalities on this site, West Conshohocken has the 26th largest share of homes built before 1980: 63%, against a county range of 17% to 98%.
| Place | Median built | Before 1980 | Owners | Row, twin | Hail days |
|---|---|---|---|---|---|
| West Conshohocken | 1949 | 63% | 75% | 54% | 14 |
| Conshohocken | 1964 | 59% | 49% | 44% | 13 |
| Bridgeport | 1964 | 79% | 43% | 38% | 15 |
| Plymouth Township, Montgomery County | 1966 | 68% | 67% | 14% | 16 |
| Lower Merion | 1955 | 81% | 75% | 12% | 18 |
| Upper Merion | 1977 | 55% | 55% | 14% | 14 |
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.
NOAA’s storm reports show 14 days since 2006 with hail of at least 1 inch inside a 10-mile circle around West Conshohocken, topping out at 1.75 in on June 6, 2023. The most recent was June 16, 2023.
Federal major-disaster declarations for storms in Montgomery County since 2006: 6, most recently DR-4618, Remnants of Hurricane Ida, declared September 2021. (OpenFEMA.)
A report says hail fell near West Conshohocken, 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; 40% 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 | Low pitches and long runs | Standing seam that carries its own loads can skip the tear-off (R908.3.1) |
| Slate | 75 years | Older houses; 46% 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 (54% of homes here are attached) | Coating is not a replacement |
Before signing for a roof in West Conshohocken, 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.
Local ordinance, not the state. Pennsylvania’s code leaves residential alterations without structural change to local ordinance (34 Pa. Code § 403.1(b)(8)). The borough code office can say what West Conshohocken requires.
On a roof that already carries two layers, or slate or tile, the code allows no recover: it is a tear-off (IRC R908.3.1.1). With 63% of West Conshohocken’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 West Conshohocken was built in 1949, 63% of homes were built before 1980, 75% are owner-occupied.
Hail of 1 inch or larger was reported on 14 days within 10 miles of West Conshohocken from 2006 through 2025 (NOAA Storm Prediction Center). A report means hail fell nearby, not that a roof was damaged.
Before signing for a roof in West Conshohocken, 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 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.