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Permitting Authorities / Radnor Township - Department of Community Development

Do you need a permit to replace a roof in Township of Radnor, PA?

Adopted code

Radnor Township - Department of Community Development

Yes, a permit is required to replace a roof in Township of Radnor, PA, issued by Radnor Township - Department of Community Development. Radnor Township requires a permit for a reroof over a quarter of the roof. Section 125-4 of the Radnor Township Code (Ordinance No. 2022-21, adopted January 3, 2023) replaces the opening paragraph of the residential code's Section R105.2, Work exempt from permit, adding "In addition, a zoning/use permit shall be required for any of the exempt work listed in this section as determined by the Building Official," and adds to its exemption list "Replacement of existing roof material that does not exceed 25% of the total roof area performed within any twelve-month period" and "Replacement of existing siding." The Department's Frequently Asked Questions page, read October 6, 2026, answers "What do I need a permit for?" with "You will need a permit for:" a list that includes "roof replacement." Its Construction Permits page says "Construction permits are required for most types of work and all contractors must be licensed with Radnor Township. Please contact the Department of Community Development to find out which types of work need permits." Under state law, Act 45 says the Act "shall not apply to" "Alterations to residential buildings which do not make structural changes or changes to means of egress, except as might be required by ordinances in effect pursuant to section 303(b)(1) or adopted pursuant to section 503" or to "Repairs to residential buildings, except as might be required by ordinances in effect pursuant to section 303(b)(1) or adopted pursuant to section 503" (section 104(b)(5) and (6)), and of a municipal ordinance that adds to the code, section 503(c) says "An ordinance under this subsection shall not be effective nor enforceable unless subsections (d), (e), (f), (g), (h) and (i) have been satisfied." This record does not decide whether the municipality's requirement is one adopted under section 503 or kept in effect by section 303(b)(1). In practice, expect the Township to require a permit for any full reroof, and to ask about a zoning/use permit for a smaller one. The page says "If work is done without permits 1st being obtained, administrative actions may be taken," the 2026 Consolidated Fee Schedule (Ordinance 2026-04) lists a "Fee for work without permits" of 50% of the permit fee, and Section 125-4 sets a fine of "not more than $1,000 per violation." Residential "Additions, alterations, repairs, demolition, etc." are charged $20.00 per $1,000 of cost, plus a $4.50 state surcharge, and two sets of permit applications are required on all submittals. Section 145-3 of the Township Code makes it "unlawful for any person, firm or corporation to engage in the business as a contractor within the Township of Radnor without first having obtained a license from the Department of Community Development," with a certificate of insurance filed before any permit is issued; the 2026 fee schedule lists the annual General Contractor's License at $50.00. "All permits issued are required to have field inspections by a Code Official," the contractor must accompany the Code Official, and the Department is reached at 610-688-5600, 301 Iven Avenue, Wayne.

Roof code checklist: Township of Radnor, PA

ItemAnswerCode citeSourceVerified
Permit to replace a roofYesecode360.com2026-10-06
Repair permit thresholdPublishedR105.2pacodeandbulletin.gov2026-10-06
Layer limit / roof-overPublishedR908.3.1.1pacodeandbulletin.gov2026-10-06
Deck & sheathingPublishedR905.2.1pacodeandbulletin.gov2026-10-06
Drip edgeNot published
Ice & water shieldNot published
Mid-roof inspectionNot published
Impact-resistant (Class 4) roofingNopacodeandbulletin.gov2026-10-06
Wind design criteriaNot published
Adopted codePublishedSec. 125-4pacodeandbulletin.gov2026-10-06
Contractor license / registrationYespalegis.us2026-10-06
Sales & use taxPublishedpa.gov2026-10-06

Each row comes from the sourced record on this page; full wording is in the table below. "Not published" means no official source for that item was found when the record was last verified.

Jurisdiction
Township of Radnor, Pennsylvania
Jurisdiction type
city
Address
301 Iven Avenue, Wayne, PA 19087
Contact
  • url: https://www.radnor.com/government/departments/community-development/construction-permits
  • phone: 610-688-5600
Roofing permit required
Required
Contractor registration required
Required
Permit process note
Radnor Township requires a permit for a reroof over a quarter of the roof. Section 125-4 of the Radnor Township Code (Ordinance No. 2022-21, adopted January 3, 2023) replaces the opening paragraph of the residential code's Section R105.2, Work exempt from permit, adding "In addition, a zoning/use permit shall be required for any of the exempt work listed in this section as determined by the Building Official," and adds to its exemption list "Replacement of existing roof material that does not exceed 25% of the total roof area performed within any twelve-month period" and "Replacement of existing siding." The Department's Frequently Asked Questions page, read October 6, 2026, answers "What do I need a permit for?" with "You will need a permit for:" a list that includes "roof replacement." Its Construction Permits page says "Construction permits are required for most types of work and all contractors must be licensed with Radnor Township. Please contact the Department of Community Development to find out which types of work need permits." Under state law, Act 45 says the Act "shall not apply to" "Alterations to residential buildings which do not make structural changes or changes to means of egress, except as might be required by ordinances in effect pursuant to section 303(b)(1) or adopted pursuant to section 503" or to "Repairs to residential buildings, except as might be required by ordinances in effect pursuant to section 303(b)(1) or adopted pursuant to section 503" (section 104(b)(5) and (6)), and of a municipal ordinance that adds to the code, section 503(c) says "An ordinance under this subsection shall not be effective nor enforceable unless subsections (d), (e), (f), (g), (h) and (i) have been satisfied." This record does not decide whether the municipality's requirement is one adopted under section 503 or kept in effect by section 303(b)(1). In practice, expect the Township to require a permit for any full reroof, and to ask about a zoning/use permit for a smaller one. The page says "If work is done without permits 1st being obtained, administrative actions may be taken," the 2026 Consolidated Fee Schedule (Ordinance 2026-04) lists a "Fee for work without permits" of 50% of the permit fee, and Section 125-4 sets a fine of "not more than $1,000 per violation." Residential "Additions, alterations, repairs, demolition, etc." are charged $20.00 per $1,000 of cost, plus a $4.50 state surcharge, and two sets of permit applications are required on all submittals. Section 145-3 of the Township Code makes it "unlawful for any person, firm or corporation to engage in the business as a contractor within the Township of Radnor without first having obtained a license from the Department of Community Development," with a certificate of insurance filed before any permit is issued; the 2026 fee schedule lists the annual General Contractor's License at $50.00. "All permits issued are required to have field inspections by a Code Official," the contractor must accompany the Code Official, and the Department is reached at 610-688-5600, 301 Iven Avenue, Wayne.
Adopted 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, Radnor Township administers the code through its own Department of Community Development: its Construction Permits page says "All inspections, with exception of electrical work, will be done be a Radnor Township Code Official," and Section 125-4 of the Township Code makes the Director of Community Development the Building Official. Section 144A-1 adopts the Uniform Construction Code, "as amended through February 14, 2022, and as further amended from time to time," as the "Radnor Building Code," and Chapter 125 adopts the model codes with local amendments. Section 125-3 adopts the "International Residential Code, 2018 Edition," as the Township's One- and Two-Family Dwelling Code, and Section 125-4's amendments, including the roof exemption, are written against that edition; the Department's Construction Permits page lists the "2021 International Residential Code" among the codes "currently in effect for Radnor Township." This record has not read the 2018 edition's text. Section 125-4 of the Radnor Township Code (Ordinance No. 2022-21, adopted January 3, 2023) replaces the opening paragraph of the residential code's Section R105.2, Work exempt from permit, adding "In addition, a zoning/use permit shall be required for any of the exempt work listed in this section as determined by the Building Official," and adds to its exemption list "Replacement of existing roof material that does not exceed 25% of the total roof area performed within any twelve-month period" and "Replacement of existing siding." Section 125-4 also fills in Table R301.2(1) and sets a fine of "not more than $1,000 per violation." Chapter 144A (Construction Codes, Uniform), Chapter 125 (Building Construction, Sections 125-1 to 125-4) and Chapter 145 (Contractors) of the Township Code, and a search of the whole Code for roof provisions, were read for this record.
Impact-resistant roofing
Not required — No impact-resistance requirement under state law. The State's adoption of the 2021 International Residential Code (34 Pa. Code 403.21) contains no hail or impact rule, and it makes no change to the code's roof assemblies chapter, which itself has no UL 2218, Class 4 or hail-impact requirement for roof coverings. A municipality could add one only by an ordinance that equals or exceeds the Uniform Construction Code under Act 45 section 503, filed with the Department of Labor and Industry; none of the filings on the Department's register of municipal code change ordinances mentions hail or impact resistance. An owner may still choose an impact-rated roof covering. Everything above is Pennsylvania state law, the same in every municipality. Locally, Radnor Township administers the code through its own Department of Community Development: its Construction Permits page says "All inspections, with exception of electrical work, will be done be a Radnor Township Code Official," and Section 125-4 of the Township Code makes the Director of Community Development the Building Official. Its permit pages and fee schedule set no UL 2218, Class 4 or hail-impact requirement, and Chapter 125 of the Township Code changes nothing in the roof covering provisions. Section 125-3 adopts the "International Residential Code, 2018 Edition," as the Township's One- and Two-Family Dwelling Code, and Section 125-4's amendments, including the roof exemption, are written against that edition; the Department's Construction Permits page lists the "2021 International Residential Code" among the codes "currently in effect for Radnor Township." This record has not read the 2018 edition's text. Chapter 144A (Construction Codes, Uniform), Chapter 125 (Building Construction, Sections 125-1 to 125-4) and Chapter 145 (Contractors) of the Township Code, and a search of the whole Code for roof provisions, were read for this record.
Repair permit threshold
Radnor Township exempts only a partial reroof from its permit: Section 125-4 of the Radnor Township Code (Ordinance No. 2022-21, adopted January 3, 2023) replaces the opening paragraph of the residential code's Section R105.2, Work exempt from permit, adding "In addition, a zoning/use permit shall be required for any of the exempt work listed in this section as determined by the Building Official," and adds to its exemption list "Replacement of existing roof material that does not exceed 25% of the total roof area performed within any twelve-month period" and "Replacement of existing siding." So a reroof over 25% of the roof area in twelve months is not on the exempt list. The Department's Frequently Asked Questions page, read October 6, 2026, answers "What do I need a permit for?" with "You will need a permit for:" a list that includes "roof replacement." Under state law, Act 45 says the Act "shall not apply to" "Alterations to residential buildings which do not make structural changes or changes to means of egress, except as might be required by ordinances in effect pursuant to section 303(b)(1) or adopted pursuant to section 503" or to "Repairs to residential buildings, except as might be required by ordinances in effect pursuant to section 303(b)(1) or adopted pursuant to section 503" (section 104(b)(5) and (6)), and of a municipal ordinance that adds to the code, section 503(c) says "An ordinance under this subsection shall not be effective nor enforceable unless subsections (d), (e), (f), (g), (h) and (i) have been satisfied." This record does not decide whether the municipality's requirement is one adopted under section 503 or kept in effect by section 303(b)(1). State law sets no square-footage or percentage threshold for roof work; any threshold is set locally. The Uniform Construction Code "does not apply to" "Alterations to residential buildings which do not make structural changes or changes to means of egress, except as required by ordinances in effect under sections 303(b)(1) or 503 of the act" or to "Repairs to residential buildings, except as required by ordinances in effect under sections 303(b)(1) and 503 of the act" (34 Pa. Code 403.1(b)(8) and (9)), and "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" (34 Pa. Code 403.62(c)). For houses the regulation adds: "An ordinary repair does not require a permit." Its list of work that is not an ordinary repair names cutting away a load-bearing wall, "The removal or cutting of any structural beam or load-bearing support," changes to a required means of egress, and new or relocated piping, wiring or mechanical work (34 Pa. Code 403.62(d)); roofing is not named. A municipality may require more: under Act 45 section 503(c) it "may enact ordinances pursuant to this section which adopt additional code requirements for alterations or repairs to residential buildings," after a public hearing and after filing the proposed ordinance with the Department of Labor and Industry. These rules concern a "Residential building," which the regulation defines as "Detached one-family and two-family dwellings and townhouses which are not more than three stories above grade plane in height with a separate means of egress and their accessory structures" (34 Pa. Code 401.1). Everything above is Pennsylvania state law, the same in every municipality. Locally, Radnor Township administers the code through its own Department of Community Development: its Construction Permits page says "All inspections, with exception of electrical work, will be done be a Radnor Township Code Official," and Section 125-4 of the Township Code makes the Director of Community Development the Building Official. Its code exemption and permit list are quoted at the start of this entry. Section 125-3 adopts the "International Residential Code, 2018 Edition," as the Township's One- and Two-Family Dwelling Code, and Section 125-4's amendments, including the roof exemption, are written against that edition; the Department's Construction Permits page lists the "2021 International Residential Code" among the codes "currently in effect for Radnor Township." This record has not read the 2018 edition's text. Chapter 144A (Construction Codes, Uniform), Chapter 125 (Building Construction, Sections 125-1 to 125-4) and Chapter 145 (Contractors) of the Township Code, and a search of the whole Code for roof provisions, were read for this record.
Roof layer limit / recover
Two layers at most where the state code reaches the job. Pennsylvania adopts the 2021 International Residential Code without changing its reroofing section, R908 (34 Pa. Code 403.21(a)(7); the State's list of changes names no Chapter 9 section). Section R908.3.1.1 says "A roof recover shall not be permitted where any of the following conditions occur," and the third condition is "Where the existing roof has two or more applications of any type of roof covering." So one existing layer may be covered once, and a roof that already has two layers is torn off to the deck. The same section also bars a recover "Where the existing roof or roof covering is water soaked or has deteriorated to the point that the existing roof or roof covering is not adequate as a base for additional roofing" and "Where the existing roof covering is slate, clay, cement or asbestos-cement tile." The existing-building code the State also adopts, the 2021 International Existing Building Code (34 Pa. Code 403.21(f)), carries the same three conditions in Section 705.2.1.1. These rules bind work the Uniform Construction Code reaches. The Act does not apply to "Repairs to residential buildings" or to alterations that make no structural change, "except as might be required by ordinances" (Act 45 section 104(b)(5) and (6)), so whether R908 binds a particular house reroof turns on that exclusion and on the municipality's own ordinances. Everything above is Pennsylvania state law, the same in every municipality. Locally, Radnor Township administers the code through its own Department of Community Development: its Construction Permits page says "All inspections, with exception of electrical work, will be done be a Radnor Township Code Official," and Section 125-4 of the Township Code makes the Director of Community Development the Building Official. Its permit pages and fee schedule say nothing on roof layers, and Chapter 125 of the Township Code changes nothing in the code's reroofing section. Section 125-3 adopts the "International Residential Code, 2018 Edition," as the Township's One- and Two-Family Dwelling Code, and Section 125-4's amendments, including the roof exemption, are written against that edition; the Department's Construction Permits page lists the "2021 International Residential Code" among the codes "currently in effect for Radnor Township." This record has not read the 2018 edition's text. Chapter 144A (Construction Codes, Uniform), Chapter 125 (Building Construction, Sections 125-1 to 125-4) and Chapter 145 (Contractors) of the Township Code, and a search of the whole Code for roof provisions, were read for this record.
Deck & sheathing requirements
State rules from the base code, where the state code reaches the job. Pennsylvania adopts the 2021 International Residential Code without changing Section R803, Roof Sheathing (34 Pa. Code 403.21(a)(7); the State's changes to Chapter 8 are to ridge framing and attic ventilation). Lumber roof sheathing follows Table R803.1: over rafters or beams 24 inches apart it must be at least 5/8 inch net thick. Wood structural panels "shall be identified for grade, bond classification and performance category by a grade mark or certificate of inspection issued by an approved agency," and their spans "shall not exceed the values set forth in Table R503.2.1.1(1) or APA E30." For shingles, "Asphalt shingles shall be fastened to solidly sheathed decks" (R905.2.1), and on any reroof "The structural roof components shall be capable of supporting the roof covering system and the material and equipment loads that will be encountered during installation of the roof covering system" (R908.2). These rules bind work the Uniform Construction Code reaches; the Act does not apply to "Repairs to residential buildings" or to alterations that make no structural change, "except as might be required by ordinances" (Act 45 section 104(b)(5) and (6)). Act 45 section 104(b)(5) excludes alterations "which do not make structural changes or changes to means of egress" and says only that "a structural change does not include a minor framing change needed to replace existing windows or doors"; 34 Pa. Code 403.62(d)(2) lists "The removal or cutting of any structural beam or load-bearing support" as not an ordinary repair. Neither names roof sheathing; this record does not decide whether replacing it is either. Everything above is Pennsylvania state law, the same in every municipality. Locally, Radnor Township administers the code through its own Department of Community Development: its Construction Permits page says "All inspections, with exception of electrical work, will be done be a Radnor Township Code Official," and Section 125-4 of the Township Code makes the Director of Community Development the Building Official. Its permit pages and fee schedule say nothing on roof sheathing, and Chapter 125 of the Township Code states no roof sheathing rule of its own. Section 125-3 adopts the "International Residential Code, 2018 Edition," as the Township's One- and Two-Family Dwelling Code, and Section 125-4's amendments, including the roof exemption, are written against that edition; the Department's Construction Permits page lists the "2021 International Residential Code" among the codes "currently in effect for Radnor Township." This record has not read the 2018 edition's text. Chapter 144A (Construction Codes, Uniform), Chapter 125 (Building Construction, Sections 125-1 to 125-4) and Chapter 145 (Contractors) of the Township Code, and a search of the whole Code for roof provisions, were read for this record.
Sales & use tax
6% Pennsylvania sales and use tax, with a local tax added on purchases made in Allegheny County (1%) and Philadelphia (2%). On a reroof the roofer pays the tax on the materials and does not add it to the homeowner's bill. The Department of Revenue says: "The Pennsylvania sales tax rate is 6 percent. By law, a 1 percent local tax is added to purchases made in Allegheny County, and 2 percent local tax is added to purchases made in Philadelphia." Roof work is a construction activity: the rule's list of items "presumed to become a permanent part of real estate" includes "Roofing (repairs)" (61 Pa. Code 31.11). For construction activities, "A contractor shall pay tax upon the purchase price ... of all property, including materials, equipment, components and supplies, which he furnishes and installs" (61 Pa. Code 31.12(a)(1)), and the rule's example says the contractor "does not charge sales tax on this transaction to his customer. The contractor may include the tax he must pay in his bid proposal but not as a separately stated item." Apart from limited exceptions set out in the rule, the same holds on jobs for tax-exempt owners: "a contractor erecting a building, repairing a roof, replacing a door for a governmental agency, ... school district, charitable or religious organization, and the like, shall pay tax upon the property which he consumes" (61 Pa. Code 31.13(a)). Everything above is Pennsylvania state law, the same in every municipality. Radnor Township is in Delaware County. Its Department of Community Development, which administers the Uniform Construction Code there, states nothing on sales tax on the permit pages and fee schedule read for this record.

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Radnor Township's Department of Community Development, at the Township Building, 301 Iven Avenue in Wayne, issues construction permits and licenses contractors in the Township, and lists roof replacement among the work that needs a permit. The Pennsylvania Uniform Construction Code applies statewide, but the Pennsylvania Construction Code Act (Act 45 of 1999) says the Act "shall not apply to" "Repairs to residential buildings, except as might be required by ordinances in effect pursuant to section 303(b)(1) or adopted pursuant to section 503" (section 104(b)(6)).

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Roofing questions: Township of Radnor, PA

Do you need a permit to replace a roof in Township of Radnor, PA?

Yes, a permit is required to replace a roof in Township of Radnor, PA. Radnor Township exempts only a partial reroof from its permit: Section 125-4 of the Radnor Township Code (Ordinance No. 2022-21, adopted January 3, 2023) replaces the opening paragraph of the residential code's Section R105.2, Work exempt from permit, adding "In addition, a zoning/use permit shall be required for any of the exempt work listed in this section as determined by the Building Official," and adds to its exemption list "Replacement of existing roof material that does not exceed 25% of the total roof area performed within any twelve-month period" and "Replacement of existing siding." So a reroof over 25% of the roof area in twelve months is not on the exempt list. The Department's Frequently Asked Questions page, read October 6, 2026, answers "What do I need a permit for?" with "You will need a permit for:" a list that includes "roof replacement." Under state law, Act 45 says the Act "shall not apply to" "Alterations to residential buildings which do not make structural changes or changes to means of egress, except as might be required by ordinances in effect pursuant to section 303(b)(1) or adopted pursuant to section 503" or to "Repairs to residential buildings, except as might be required by ordinances in effect pursuant to section 303(b)(1) or adopted pursuant to section 503" (section 104(b)(5) and (6)), and of a municipal ordinance that adds to the code, section 503(c) says "An ordinance under this subsection shall not be effective nor enforceable unless subsections (d), (e), (f), (g), (h) and (i) have been satisfied." This record does not decide whether the municipality's requirement is one adopted under section 503 or kept in effect by section 303(b)(1). State law sets no square-footage or percentage threshold for roof work; any threshold is set locally. The Uniform Construction Code "does not apply to" "Alterations to residential buildings which do not make structural changes or changes to means of egress, except as required by ordinances in effect under sections 303(b)(1) or 503 of the act" or to "Repairs to residential buildings, except as required by ordinances in effect under sections 303(b)(1) and 503 of the act" (34 Pa. Code 403.1(b)(8) and (9)), and "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" (34 Pa. Code 403.62(c)). For houses the regulation adds: "An ordinary repair does not require a permit." Its list of work that is not an ordinary repair names cutting away a load-bearing wall, "The removal or cutting of any structural beam or load-bearing support," changes to a required means of egress, and new or relocated piping, wiring or mechanical work (34 Pa. Code 403.62(d)); roofing is not named. A municipality may require more: under Act 45 section 503(c) it "may enact ordinances pursuant to this section which adopt additional code requirements for alterations or repairs to residential buildings," after a public hearing and after filing the proposed ordinance with the Department of Labor and Industry. These rules concern a "Residential building," which the regulation defines as "Detached one-family and two-family dwellings and townhouses which are not more than three stories above grade plane in height with a separate means of egress and their accessory structures" (34 Pa. Code 401.1). Everything above is Pennsylvania state law, the same in every municipality. Locally, Radnor Township administers the code through its own Department of Community Development: its Construction Permits page says "All inspections, with exception of electrical work, will be done be a Radnor Township Code Official," and Section 125-4 of the Township Code makes the Director of Community Development the Building Official. Its code exemption and permit list are quoted at the start of this entry. Section 125-3 adopts the "International Residential Code, 2018 Edition," as the Township's One- and Two-Family Dwelling Code, and Section 125-4's amendments, including the roof exemption, are written against that edition; the Department's Construction Permits page lists the "2021 International Residential Code" among the codes "currently in effect for Radnor Township." This record has not read the 2018 edition's text. Chapter 144A (Construction Codes, Uniform), Chapter 125 (Building Construction, Sections 125-1 to 125-4) and Chapter 145 (Contractors) of the Township Code, and a search of the whole Code for roof provisions, were read for this record.

Can you roof over an existing roof in Township of Radnor, PA?

Two layers at most where the state code reaches the job. Pennsylvania adopts the 2021 International Residential Code without changing its reroofing section, R908 (34 Pa. Code 403.21(a)(7); the State's list of changes names no Chapter 9 section). Section R908.3.1.1 says "A roof recover shall not be permitted where any of the following conditions occur," and the third condition is "Where the existing roof has two or more applications of any type of roof covering." So one existing layer may be covered once, and a roof that already has two layers is torn off to the deck. The same section also bars a recover "Where the existing roof or roof covering is water soaked or has deteriorated to the point that the existing roof or roof covering is not adequate as a base for additional roofing" and "Where the existing roof covering is slate, clay, cement or asbestos-cement tile." The existing-building code the State also adopts, the 2021 International Existing Building Code (34 Pa. Code 403.21(f)), carries the same three conditions in Section 705.2.1.1. These rules bind work the Uniform Construction Code reaches. The Act does not apply to "Repairs to residential buildings" or to alterations that make no structural change, "except as might be required by ordinances" (Act 45 section 104(b)(5) and (6)), so whether R908 binds a particular house reroof turns on that exclusion and on the municipality's own ordinances. Everything above is Pennsylvania state law, the same in every municipality. Locally, Radnor Township administers the code through its own Department of Community Development: its Construction Permits page says "All inspections, with exception of electrical work, will be done be a Radnor Township Code Official," and Section 125-4 of the Township Code makes the Director of Community Development the Building Official. Its permit pages and fee schedule say nothing on roof layers, and Chapter 125 of the Township Code changes nothing in the code's reroofing section. Section 125-3 adopts the "International Residential Code, 2018 Edition," as the Township's One- and Two-Family Dwelling Code, and Section 125-4's amendments, including the roof exemption, are written against that edition; the Department's Construction Permits page lists the "2021 International Residential Code" among the codes "currently in effect for Radnor Township." This record has not read the 2018 edition's text. Chapter 144A (Construction Codes, Uniform), Chapter 125 (Building Construction, Sections 125-1 to 125-4) and Chapter 145 (Contractors) of the Township Code, and a search of the whole Code for roof provisions, were read for this record.

Do roofing contractors need a license or registration in Township of Radnor, PA?

Yes.

What building code does Township of Radnor, PA use?

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, Radnor Township administers the code through its own Department of Community Development: its Construction Permits page says "All inspections, with exception of electrical work, will be done be a Radnor Township Code Official," and Section 125-4 of the Township Code makes the Director of Community Development the Building Official. Section 144A-1 adopts the Uniform Construction Code, "as amended through February 14, 2022, and as further amended from time to time," as the "Radnor Building Code," and Chapter 125 adopts the model codes with local amendments. Section 125-3 adopts the "International Residential Code, 2018 Edition," as the Township's One- and Two-Family Dwelling Code, and Section 125-4's amendments, including the roof exemption, are written against that edition; the Department's Construction Permits page lists the "2021 International Residential Code" among the codes "currently in effect for Radnor Township." This record has not read the 2018 edition's text. Section 125-4 of the Radnor Township Code (Ordinance No. 2022-21, adopted January 3, 2023) replaces the opening paragraph of the residential code's Section R105.2, Work exempt from permit, adding "In addition, a zoning/use permit shall be required for any of the exempt work listed in this section as determined by the Building Official," and adds to its exemption list "Replacement of existing roof material that does not exceed 25% of the total roof area performed within any twelve-month period" and "Replacement of existing siding." Section 125-4 also fills in Table R301.2(1) and sets a fine of "not more than $1,000 per violation." Chapter 144A (Construction Codes, Uniform), Chapter 125 (Building Construction, Sections 125-1 to 125-4) and Chapter 145 (Contractors) of the Township Code, and a search of the whole Code for roof provisions, were read for this record.