Adopted building code
The 2021 International Residential Code, as adopted by the State in the Pennsylvania Uniform Construction Code (UCC). 34 Pa. Code 403.21(a)(7) adopts "The 'International Residential Code of 2021,' except that:" followed by the State's list of exclusions and modifications, effective January 1, 2026 (55 Pa.B. 7701). None of the State's changes touches Chapter 9, Roof Assemblies, or Section R803, Roof Sheathing, so those apply as the International Code Council publishes them. Work on existing buildings is also pointed to the State's existing-building code: "The repair, alteration, change of occupancy, addition and relocation of existing buildings must comply with Chapter 34 of the 'International Building Code of 2021' or with the 'International Existing Building Code of 2021'" (34 Pa. Code 403.21(f)). The UCC is the minimum everywhere in the state: "no municipality may propose or enact any ordinance which is less than the minimum requirement of the Uniform Construction Code" (Pennsylvania Construction Code Act, Act 45 of 1999, section 503(b)). The Act also lists work it "shall not apply to", including "Alterations to residential buildings which do not make structural changes or changes to means of egress" or to "Repairs to residential buildings," in each case "except as might be required by ordinances" kept in force under section 303(b)(1) or adopted under section 503 (Act 45 section 104(b)(5) and (6); 34 Pa. Code 403.1(b)(8) and (9)). The Act defines a repair as "The reconstruction or renewal of any part of an existing building for the purpose of its maintenance." So whether the code's roofing rules reach a given house reroof depends on the municipality's own ordinances. Everything above is Pennsylvania state law, the same in every municipality. Locally, The City of Carbondale issues its own City permits at City Hall, 1 North Main Street, and the City's permit packet names Northeast Inspection Consultants (NEIC), 209 Main Street, Childs, for "Building, Electrical, Plumbing, Mechanical, and Fire" subcode applications under the Uniform Construction Code. The City's codified ordinances were not found published online, and this record has not read the City's Uniform Construction Code adoption ordinance or any City ordinance on permits for residential repairs. The City pages read for this record name no code edition.
Permit process
The City of Carbondale requires its own Roof Permit for removal and replacement of roofing materials, a local permit separate from a UCC building permit. The City's Roof Permit form, posted on its Applications and Permits page as "Roofing Permit Fees" (2026, read October 9, 2026; a scanned document, transcribed from the rendered page image), says "This permit is issued for removal & replacement of roofing materials exempted from the Uniform Construction Code. Any work on rafters, trusses or complete sheathing replacement requires a UCC building permit," with a "BASE ROOFING PERMIT COST $75.00 plus Fees." Its fee table adds $10.00 for a project cost up to $2,500.00 and $10.00 more for each further $2,500.00 up to $50,000.00 (a total of $275.00 at $50,000.00), and "For every $5,000.00 above $50,000.00 the fee increases $15.00," based on "total cost of the job, Labor and Materials." The City's permit packet (its Building Permit form and FAQ) says "Almost everything requires a permit within the City of Carbondale," answers "What work does not require a permit?" with "Painting and carpeting," and lists "UCC Permits" and "City of Carbondale Permit Fees - $30 per $1,000 worth of work cost" as separate fees. So the permit the City's pages name for a house reroof that leaves the rafters, trusses and most of the sheathing alone is the City's own Roof Permit, a local permit the form itself describes as for work exempted from the Uniform Construction Code; work on rafters, trusses or a complete sheathing replacement is outside that line and needs a UCC building permit. The City's codified ordinances were not found published online, and this record has not read the City's Uniform Construction Code adoption ordinance or any City ordinance on permits for residential repairs. Under state law, Act 45 section 104(b)(5) and (6) list "Alterations to residential buildings which do not make structural changes or changes to means of egress" and "Repairs to residential buildings" among work the Act does not apply to, "except as might be required by ordinances in effect pursuant to section 303(b)(1) or adopted pursuant to section 503," and 34 Pa. Code 403.62(c) says "A permit is not required for the exceptions listed in § 403.1(b) (relating to scope) and the following, if the work does not violate a law or ordinance." This record does not decide whether a UCC building permit is needed for a house reroof here. In practice, expect the City to require its Roof Permit before a house is reroofed, and a UCC building permit through NEIC where rafters, trusses or the whole sheathing are replaced. The form says "PERMIT MUST BE POSTED ON / IN 1ST FLOOR DOOR or WINDOW"; the City pages read for this record state no penalty for roof work done without a permit. UCC subcode applications go to NEIC by its online form, and the City's Roofing Permit Fees sheet gives City Hall's number as 570-282-4632, extension 130; City Hall is open weekdays, 9 a.m. to 4 p.m. Read for this answer: the City's Applications and Permits page; the Roof Permit form and Roofing Permit Fees table; the City's permit packet (Building Permit form and FAQ); the City's Neighborhood Preservation Ordinance as posted on its site; and the NEIC subcode applications page.