Permit
Local ordinance, not the state
The state code does not cover a reroof that changes no structure (34 Pa. Code § 403.1(b)(8)). So the township code office in Whitemarsh is the one to ask before work starts.
Source: 34 Pa. Code § 403.1(b)
Roof Replacement in Whitemarsh, PA
Half of the 8,236 homes in Whitemarsh were built before 1973. 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 Whitemarsh
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). 58% of Whitemarsh’s homes were built before 1980, so count the layers before comparing quotes.
Ice barrier
Whitemarsh’s climate table decides
IRC R905.1.2 calls for an ice barrier where Table R301.2 says so; in Pennsylvania the municipality completes that table. Whitemarsh’s answer is with the township code office.
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 Whitemarsh
Owners live in 5,850 of Whitemarsh’s occupied homes, or 74%. By year built, 9% before 1940, 35% before 1960, 58% before 1980; 21% went up in 2000 or later. (ACS 2020–2024.)
By building type: 59% detached houses, 15% attached single-family houses (rowhouses, twins and townhouses).
Of the 61 Montgomery County municipalities on this site, Whitemarsh has the 32nd largest share of homes built before 1980: 58%, against a county range of 17% to 98%.
ZIP codes: 19031 · 19034 · 19428 · 19444 · 19462
Whitemarsh and the towns around it
| Place | Median built | Before 1980 | Owners | Row, twin | Hail days |
|---|---|---|---|---|---|
| Whitemarsh | 1973 | 58% | 74% | 15% | 16 |
| Springfield Township, Montgomery County | 1954 | 83% | 83% | 14% | 16 |
| Plymouth Township, Montgomery County | 1966 | 68% | 67% | 14% | 16 |
| Conshohocken | 1964 | 59% | 49% | 44% | 13 |
| Ambler | 1954 | 84% | 50% | 29% | 17 |
| Whitpain | 1983 | 41% | 77% | 24% | 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.
Storm record around Whitemarsh
Within 10 miles of Whitemarsh, hail of an inch or more was reported on 16 days between 2006 and 2025, the biggest stones 1.75 in on June 6, 2023. The most recent was May 3, 2025.
Remnants of Hurricane Ida (DR-4618, September 2021) is the latest of 6 federal storm declarations covering Montgomery County since 2006. (OpenFEMA.)
A report says hail fell near Whitemarsh, not that it damaged a roof. When wind or hail damage means a new roof.
What goes on the roof next
Useful life is HUD’s planning figure, not a warranty. 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; 59% 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; 9% 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 (15% of homes here are attached) | Coating is not a replacement |
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 Whitemarsh 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 Whitemarsh
Does a roof replacement in Whitemarsh need a permit?
Local ordinance, not the state. The state code does not cover a reroof that changes no structure (34 Pa. Code § 403.1(b)(8)). So the township code office in Whitemarsh is the one to ask before work starts.
Can a new roof go over the old one in Whitemarsh?
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). 58% of Whitemarsh’s homes were built before 1980, so count the layers before comparing quotes.
How old are the houses in Whitemarsh?
By the Census Bureau’s American Community Survey (2020–2024), the median home in Whitemarsh was built in 1973, 58% of homes were built before 1980, 74% are owner-occupied.
How often does hail hit Whitemarsh?
Hail of 1 inch or larger was reported on 16 days within 10 miles of Whitemarsh 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 Whitemarsh?
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 Whitemarsh and look it up.
What they will ask on the phone
- Your address or ZIP code in Whitemarsh
- How many stories the house has, and whether it is detached or attached
- The roof you have today, shingle, metal, slate, tile or flat, and its rough age
- How many layers are on it, if you know
- That the job is a full replacement or a new roof, and your timing
- Any historic-district or HOA rules on the house in Whitemarsh
- That the house is yours and the decision is yours
The full list: before you call.