North Carolina Roofing Estimate Justification Manual

North Carolina Roofing Estimate Justification Manual 1. NC Building Code Compliance All roofing work in North Carolina must comply with the NC State Building Code (2018 Residential Code with Amendments). Per Section R113.1, it is unlawful to execute or estimate work contrary to code. Insurance estimates must include all code-required items regardless of prior construction. Source: NC State Building Code: https://www.ncosfm.gov/building-codes 2. Decking Replacement Standards Per R905.2.1, asphalt shingles must be applied to solid sheathing. APA and Owens Corning specify maximum deflection of 1/180 span. Unsupported, rotted, or spaced decking must be replaced. APA nailing patterns: 6 O.C. edges, 12 in field. Minimum: 3/8 plywood or 7/16 OSB. Sources: - NC Code R905.2.1: https://codes.iccsafe.org/content/NCRC2018 - APA Installation Guide: https://www.apawood.org/roof-sheathing 3. Valley Protection (ASTM D1970) Closed valley systems require Ice & Water barrier compliant with ASTM D1970. Required in all regions to prevent water intrusion. Warranties also require this protection. Source: ASTM D1970: https://www.astm.org/d1970 4. Ice & Water Barrier by Zone For areas of NC where average January temps fall below 25F (mountains and foothills), an eave barrier is required extending 24 inside the warm wall line. Required for warranty in all valleys and low-slope sections. Source: NC Climate Data Maps: https://www.weather.gov/media/iln/climate/Normals/NCNormals.pdf 5. Underlayment Requirements Per R905.1.1 and R905.2.7, all shingles must have underlayment. Slopes from 2:12 to 4:12 require two layers. Slopes below 2:12 require membrane roof systems. Installation must follow ASTM D226 or D4869 (Type I or II). Sources: - Code R905.2.7: https://codes.iccsafe.org/content/NCRC2018 - ASTM Underlayment: https://www.astm.org/d226 6. Drip Edge Installation Code R905.2.8.5 requires drip edge at eaves and rakes, installed under underlayment at eaves and over on North Carolina Roofing Estimate Justification Manual rakes. Fastened every 12 and overlapped 2. Required for code and manufacturer warranty. Code Reference: https://codes.iccsafe.org/content/NCRC2018/chapter-9-roof-assemblies 7. Starter Strip Requirement Starter strips are not optional. Manufacturer specs (Owens Corning, GAF) require proprietary starter course at eaves and rakes for wind warranty. Cutting field shingles violates warranty. Example: Owens Corning Starter Shingles: https://www.owenscorning.com/en-us/roofing/shingles/starter-shingle-roll 8. Flashing Requirements Per R903.2.1, all transitions must be flashed: sidewalls, step flashing, headwalls, kickout flashings. Flashing must be replaced if rusted, damaged, or improperly installed. Reuse is not compliant with code or warranty. Code Reference: https://codes.iccsafe.org/content/NCRC2018/chapter-9-roof-assemblies 9. Chimney Cricket & Saddle Code requires crickets behind chimneys wider than 30. This prevents ponding and directs water away. Required per R1003.20. Code Reference: https://codes.iccsafe.org/content/NCRC2018 10. OSHA Compliance OSHA 29 CFR 1926 applies to all NC worksites. Fall protection, safety monitors, ladders, and sanitation must be included. Violations can result in citations or injuries. Supplements must include associated labor or O&P. OSHA Standards: https://www.osha.gov/laws-regs/regulations/standardnumber/1926 11. Nail Type & Fastening Code R905.2.5 mandates nails to be corrosion-resistant, minimum 12-gauge shank, and 3/8 head, penetrating the roof sheathing by at least 3/4. Proper fastening prevents uplift and wind-related failures. https://codes.iccsafe.org/content/NCRC2018/chapter-9-roof-assemblies 12. Ridge Cap Justification Ridge caps differ in labor and material from field shingles and should be estimated as separate line items. Xactimate recognizes cost/labor differentials due to shingle modification, fastening, and layout. North Carolina Roofing Estimate Justification Manual https://www.xactware.com/solutions/claims-estimating/xactimate/ 13. Steep & High Roof Charges Xactimate recognizes steep (>7/12) and high (>2 stories) roofs as requiring additional labor and safety precautions. These are approved line items in Xactimate under RFG+HIGH or RFG+STEEP. https://www.xactware.com/solutions/pricing-data/price-lists-and-product-updates/ 14. Shingle Waste Calculation Waste percentages vary depending on layout (racking, diagonal), structure complexity (valleys, hips, dormers), and packaging. Manufacturer waste guidelines must be adhered to. https://www.owenscorning.com/en-us/roofing/tools/shingle-calculator 15. No Reuse of Flashing Flashing may have pre-existing holes, corrosion, or be non-compliant with new system components. Code R907.5 prohibits reusing old materials. https://codes.iccsafe.org/content/NCRC2018/chapter-9-roof-assemblies 16. Counterflashing/Reglet Standards Chimneys and masonry require counterflashing or reglet flashings cut into the mortar joint. Surface mounting is non-compliant. IRC R1003.20. https://codes.iccsafe.org/content/NCRC2018 17. Wall Flashing Behind Siding Step flashing must be properly installed behind cladding. Siding may need partial removal to comply. Foam insulation (ZIP) must be sealed with compatible tapes. https://www.jameshardiepros.com/~/media/Publication%20Files/Installation%20Instructions/HardiePlankLapS iding/hz10/hardieplank-hz10-us-en.pdf 18. Pipe Boot & Vent Caps Roof penetrations must be flashed with boots of correct size and UV resistance. Rubber collars fail after 810 years. Replacement aligns with IRC R903.2. https://codes.iccsafe.org/content/NCRC2018/chapter-9-roof-assemblies North Carolina Roofing Estimate Justification Manual 19. Roof Exhaust Clearance Exhaust vents must terminate 12 above roof surface (dryer, bath). Short stacks can recirculate moisture and are code violations. Ref: IRC M1501. https://codes.iccsafe.org/content/IRC2018 20. Sealant Quantities Sealants should be quantified by application (per vent, corner, pipe). 1 tube typically covers 510 applications depending on nozzle size. https://www.ge.com/buildingsealants 21. Paint / Stain of Metal Trim Metal vents, flashing, drip edge often require paint to match HOA or color specs. This includes masking, drying time, and multiple coats. https://www.homedepot.com/p/Rust-Oleum-Professional-15-oz-Flat-White-Primer-Spray-6-Pack-7582838/10 22. Permit & Inspection Fees Most NC counties require permits for roofing work. Some require inspection on redecking, insulation, or sheathing exposure. https://www.ncosfm.gov/building-codes/inspection-departments 23. Labor Trade Classification Demolition labor (DMO) is often applied incorrectly to roofing tear-offs. Roof labor requires higher insurance and pay scale. Switch line items from DMO to RFG. https://www.xactware.com/solutions/pricing-data/ 24. Sanitation & Safety Facilities OSHA 1926.51 and 1910.141 require on-site toilet, potable water, and handwashing. Porta-johns and coolers must be estimated. https://www.osha.gov/laws-regs/regulations/standardnumber/1926/1926.51 25.