Roofing isn’t cheap. The national average for a full roof replacement on a standard 2,000-square-foot home can range from $8,500 to over $14,000, depending on materials and complexity (source: U.S. Census Bureau). So it’s no surprise that many homeowners in Asheville and across the U.S. ask:
“Can I just replace the damaged half of my roof?”
The short answer is: yes, you can replace half of your roof — but should you?
In this article, we’ll dive into the costs, risks, and regulations associated with partial roof replacement. We’ll also explore when it’s truly the best option and when you’re better off investing in a full roof replacement. Backed by building codes, manufacturer recommendations, and real-world roofing experience from Asheville’s Litespeed Construction, this article is your go-to resource.
Key Takeaways
💡Yes, you can replace half of a roof, but it comes with serious risks.
💡Local building codes in North Carolina and manufacturer warranties often require a full replacement.
💡Partial roof replacements may save money short-term, but are often more expensive long-term.
💡Consulting a certified roofing contractor like Litespeed Construction ensures legal compliance, code adherence, and a safer roofing system.
What Does "Replace Half of a Roof" Mean?
“Replacing half a roof” typically refers to removing and replacing shingles, underlayment, and flashing on one slope or one side of a pitched roof. This can occur:
- After storm damage
- Due to tree impact
- For budget reasons
- When the back side deteriorates faster due to sun exposure
However, the roof is a system, and splitting that system often introduces vulnerabilities.
Pros and Cons of Replacing Half a Roof
| Pros | Cons |
|---|---|
| Lower upfront cost | Material mismatch |
| Faster installation time | Voided manufacturer warranty |
| Immediate fix for visible damage | Uneven aging and future repairs |
| May be allowed for insurance claims | Non-compliance with building codes |
| Useful for flat roofs or additions | Often more costly long-term |
Legal and Code Considerations in North Carolina
The North Carolina Residential Building Code (based on the 2018 IRC) provides guidelines on when you can perform partial replacements.
According to Section R908.3, if more than 25% of the total roof area is replaced within a 12-month period, the entire roofing system must be upgraded to current code.
🛑 This means:
- You can replace less than 25% in theory
- Replacing half a roof could trigger full replacement requirements
- Improperly split roofs may not pass inspection or insurance certification
Cost Analysis – Partial vs. Full Roof Replacement
| Roof Type | Partial Replacement (Half) | Full Replacement | Notes |
|---|---|---|---|
| Asphalt Shingle Roof | $3,000 – $5,500 | $8,500 – $14,000 | Cost depends on size and pitch |
| Metal Roof | $5,000 – $8,000 | $12,000 – $20,000 | Complex installation |
| Flat Roof | $4,000 – $6,000 | $8,000 – $12,000 | Common for commercial buildings |
(Source: National Roofing Contractors Association & Local NC Contractors Data)
🔎 Important: You may pay less upfront for partial roof work, but if the other half fails within 2–5 years, you’ll pay again for mobilization, labor, and material costs — often at higher prices due to inflation or material shortages.
Roofing Manufacturer Warranties & Partial Replacements
Shingle manufacturers like GAF, CertainTeed, and Owens Corning often void warranties if a roof is not replaced as a whole system. They require:
- Matching underlayment and ventilation
- Proper nailing techniques
- Certified installer practices
If you replace half of a roof with new shingles, but leave the old ventilation and flashing, you risk:
- Water intrusion
- Ice damming
- Accelerated wear
🏷️ Result: No warranty coverage. You’re on your own if a problem arises.
Insurance Claims – When Partial Replacement Applies
After a storm, hail event, or falling tree, your insurance provider may approve partial replacement — especially if only one side of the roof is visibly damaged.
✅ Accepted by Insurers If:
- Damage is confined and documented
- The material is still available
- No code upgrade is triggered
However, some adjusters will offer partial coverage to reduce their payout, even when the damage logically requires a full replacement. That’s where a contractor like Litespeed Construction can advocate for you and negotiate fair coverage.
When It Makes Sense to Replace Half a Roof
✅ Situations where replacing half a roof may be logical:
- New addition or expansion to your home
- Flat commercial roofs with separated systems
- Confirmed localized damage with available matching materials
- You plan to sell the home soon and want to boost curb appeal temporarily
⛔ But be cautious: Every case should be reviewed by a licensed roofing contractor.
Web Ratings: National Roofing Authority Benchmarks
| Authority / Org | Rating on Partial Roof Replacements |
|---|---|
| National Roofing Contractors Assoc. | Caution advised — full systems recommended |
| North Carolina Licensing Board | Emphasizes code compliance and permit requirements |
| Better Business Bureau (Roofing Sector) | Full replacement preferred for long-term integrity |
| Consumer Reports | Notes mismatch, resale value risk with partials |
FAQs About Replacing Half a Roof
Yes, but if it exceeds 25% of the total surface, NC code may require a full replacement.
It depends on your policy and damage type. Insurers may push for partial, but that doesn’t mean it’s best.
Yes. Shingle color fades over time. Even the same product may not match due to wear and UV exposure.
You can — but if the front fails later, you’ll have to redo the process at a higher cost.
Often, yes. Most manufacturers require full-system installs to honor warranties.
The new side may last 20–25 years, but the old side may fail much sooner, leading to premature replacement.
Yes. The City of Asheville requires permits for roofing jobs over $5,000 or that involve structural changes.
Initially yes — but potential rework, mismatches, and code upgrades may make it costlier over time.
Yes. Litespeed Construction offers flexible financing options for both partial and full replacements.
Schedule a free roof inspection with Litespeed Construction to evaluate damage, cost, and code compliance.
Why You Should Hire a Licensed Roofer (Like Litespeed Construction)
Hiring the right contractor is the most critical step in determining whether to replace half of a roof or commit to a full system upgrade. Here’s why Litespeed Construction is trusted across Asheville:
⭐ Company Highlights:
- 14+ years of roofing expertise in Western NC
- Licensed & insured
- 5-star ratings on Google & Yelp
- Certified by top shingle manufacturers
- Expert in navigating insurance claims
- Transparent pricing & photo-documented inspections
📞 Call Litespeed Construction for a free roofing inspection before making any decision about your roof.
