The median home in East Norriton was built in 1974; there are 6,542 of them. 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.
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)). So the township code office in East Norriton is the one to ask before work starts.
Source: 34 Pa. Code § 403.1(b)
Layers
IRC R908.3.1.1 forbids roofing over two existing layers, over slate or tile, or over a water-soaked roof. 59% of East Norriton’s homes were built before 1980, so count the layers before comparing quotes.
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. East Norriton’s answer is with the township code office.
Checked against the code text on October 24, 2026. The state’s code edition and the rest of its rules: roof replacement in Pennsylvania.
Owners live in 4,248 of East Norriton’s occupied homes, or 70%. Counting by decade, 27% before 1960, 59% before 1980 of the housing was in place, and 19% dates from 2000 on. (ACS 2020–2024.)
The housing is 58% detached houses, 13% attached single-family houses (rowhouses, twins and townhouses).
Of the 61 Montgomery County municipalities on this site, East Norriton has the 30th largest share of homes built before 1980: 59%, against a county range of 17% to 98%.
ZIP codes: 19401
| Place | Median built | Before 1980 | Owners | Row, twin | Hail days |
|---|---|---|---|---|---|
| East Norriton | 1974 | 59% | 70% | 13% | 15 |
| Norristown | 1957 | 81% | 43% | 47% | 17 |
| West Norriton | 1979 | 52% | 68% | 31% | 16 |
| Worcester | 1993 | 27% | 85% | 27% | 18 |
| Whitpain | 1983 | 41% | 77% | 24% | 15 |
| Bridgeport | 1964 | 79% | 43% | 38% | 15 |
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.
Since 2006 the National Weather Service has logged hail of 1 inch or larger on 15 separate days within 10 miles of East Norriton; the largest was 1.75 in on June 6, 2023. The most recent was August 18, 2024.
Montgomery County has had 6 federal major-disaster declarations for storms since 2006; the latest was DR-4618, Remnants of Hurricane Ida (September 2021). (OpenFEMA.)
Storm reports are what observers logged, not a measure of damage to any 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; 58% 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 | A complete standing-seam system may go over the old roof (R908.3.1) |
| Slate | 75 years | Older and historic houses | Sound slate can be reused (R908.5); broken slate cannot |
| Flat roof: EPDM or TPO | 15 years | Additions and porch roofs | Coating is not a replacement |
Before signing for a roof in East Norriton, 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).
Contracts, deposits and the right to cancel: checking a roofing contractor. What moves the price: new roof cost in Pennsylvania.
East Norriton’s ordinance decides. Pennsylvania’s code leaves residential alterations without structural change to local ordinance (34 Pa. Code § 403.1(b)(8)). So the township code office in East Norriton is the one to ask before work starts.
IRC R908.3.1.1 forbids roofing over two existing layers, over slate or tile, or over a water-soaked roof. 59% of East Norriton’s homes were built before 1980, so count the layers before comparing quotes.
By the Census Bureau’s American Community Survey (2020–2024), the median home in East Norriton was built in 1974, 59% of homes were built before 1980, 70% are owner-occupied.
Hail of 1 inch or larger was reported on 15 days within 10 miles of East Norriton 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 East Norriton, 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.