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, Dunmore Borough sends building permit applicants to Northeast Inspection Consultants (NEIC): the Borough's Find A Form page, under "Northeast Inspection Consultant Forms," says "Most permits/applications can be found on NEIC’s website www.neic.us," and NEIC describes itself as providing "Uniform Construction Code inspection services for the cities and municipalities throughout the Commonwealth." NEIC's office is at 209 Main Street, Childs, telephone 570-280-2111; the Borough's Code & Zoning Department is at the Borough building, 400 S. Blakely Street, Dunmore. The Borough's codified ordinances were not found published online: its Borough Ordinances page lists zoning, rental registration, floodplain, the 2018 International Property Maintenance Code and other ordinances but no ordinance adopting the Uniform Construction Code, and no online code library for the Borough was found. So the Borough's Uniform Construction Code ordinance, any permit or exemption section in it, and any older building ordinance it keeps in force were not read. The Borough's and NEIC's pages name no code edition.
Permit process
No Dunmore Borough text read names reroofing as permit work or as exempt. The Borough's Code & Zoning Department page (read October 7, 2026) sets a zoning permit fee "In addition to inspection and plan review fees" and names no roof work. NEIC's Building Subcode application, posted on its Subcode Applications page, lists "ROOFING" among its types of work beside new building, addition, alteration, fence, sign, pool and demolition; that form is NEIC's own general form, does not name Dunmore, and leaves the municipality blank. The Borough's codified ordinances were not found published online: its Borough Ordinances page lists zoning, rental registration, floodplain, the 2018 International Property Maintenance Code and other ordinances but no ordinance adopting the Uniform Construction Code, and no online code library for the Borough was found. So the Borough's Uniform Construction Code ordinance, any permit or exemption section in it, and any older building ordinance it keeps in force were not read. 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." Neither the Borough's pages nor NEIC's general application names reroofing in Dunmore as permit work or as exempt, and the Borough's code could not be read, so this record does not decide whether the Borough requires a permit for an ordinary reroof. Ask NEIC at 570-280-2111 before work starts. NEIC's Subcode Applications page says to download the form, fill it out, save it and send it to NEIC's office, and NEIC's Building Subcode application asks for the owner, the contractor, the description of work and the estimated cost of building work. The Borough's Find A Form page also posts a Borough contractor license application, at a license fee of $100.00 per calendar year with certificates of insurance required. Read for this answer: the Borough's Code & Zoning Department, Find A Form, Borough Ordinances, FAQ and Contact pages; NEIC's home, Subcode Applications and Important Forms pages; and NEIC's Building Subcode application. The Borough's codified ordinances were not found published online.