Complete Roof ShingleReplacement Guide
Everything you need to know about replacing your roof shingles - from recognizing warning signs to selecting materials and finding the right contractor.
Written by GAF Master Elite Certified Roofing Professionals
What is Roof Shingle Replacement?
Roof shingle replacement is the process of removing your existing worn or damaged shingles and installing new ones to restore your roof's protective capabilities. Unlike simple repairs that address isolated damage, replacement involves the entire roof surface.
A complete shingle replacement typically includes removing all old roofing materials down to the deck, inspecting and repairing the underlying structure, installing new underlayment and flashing, and applying new shingles according to manufacturer specifications and local building codes.
Replacement vs. Repair: When Does Each Make Sense?
Choose Repair When:
- Damage is isolated to a small area
- Roof is less than 10-15 years old
- Less than 30% of shingles affected
- No structural damage present
Choose Replacement When:
- Roof is 20+ years old
- Widespread damage or wear
- Multiple leaks occurring
- Planning to sell your home
For a detailed comparison, see our guide: Roof Replacement vs Repair: Making the Right Choice
Signs You Need Roof Shingle Replacement
Recognizing these warning signs early can prevent costly water damage and structural issues.
Age Over 20 Years
Most asphalt shingles last 20-30 years. If your roof is approaching or past this age, it's time for a professional inspection.
Curling or Buckling Shingles
Shingles that curl at edges or buckle in the middle have lost their weatherproofing ability and are vulnerable to wind damage.
Missing Shingles
Missing shingles expose your roof deck to water infiltration. If you see bare spots, replacement may be necessary.
Granules in Gutters
Excessive granule loss (the sandpaper-like coating) indicates shingles are deteriorating and losing UV protection.
Water Stains on Ceilings
Brown water stains or bubbling paint on interior ceilings often indicate roof leaks that may require replacement.
Daylight Through Roof Boards
If you can see light through your roof boards from the attic, your roof has serious structural issues requiring immediate attention.
Sagging Roof Deck
A sagging roofline indicates structural damage from moisture. This is a serious issue requiring professional assessment.
Moss or Algae Growth
While not immediately critical, moss and algae retain moisture and can accelerate shingle deterioration over time.
High Energy Bills
Sudden increases in heating/cooling costs may indicate poor roof ventilation or insulation due to deteriorating shingles.
Not sure if you need replacement? Get a professional assessment.
Schedule Free Roof InspectionTypes of Replacement Shingles (2025)
Modern shingles offer improved durability, energy efficiency, and aesthetics. Here are your options:
Architectural Shingles
Also called "dimensional" or "laminate" shingles
Multi-layered construction creates a dimensional look that mimics wood shakes or slate. The most popular choice for residential roofing.
Top Brands:
GAF Timberline HDZ, CertainTeed Landmark, Owens Corning Duration
3-Tab Shingles
Traditional flat asphalt shingles
Single-layer construction with a flat appearance. Most economical option but less durable than architectural shingles.
Note: Not recommended for hurricane-prone or high-wind areas.
Designer/Luxury Shingles
High-end aesthetic options
Premium shingles that authentically replicate slate, cedar shake, or tile appearance with superior performance.
Top Brands:
GAF Grand Canyon, CertainTeed Grand Manor, Owens Corning Berkshire
2025 Shingle Innovations
Impact Resistance
Class 4 rated shingles withstand 2-inch hailstones. May qualify for insurance discounts.
Algae Resistance
Copper-infused granules prevent black streaks for 25+ years. Essential for humid climates.
Cool Roof Technology
Reflective granules reduce attic temperatures by up to 20°F, lowering cooling costs.
Enhanced Wind Ratings
New adhesive strips provide 130-150 MPH wind resistance for coastal protection.
The Roof Shingle Replacement Process
Understanding what happens during replacement helps you prepare and ensures quality results.
Pre-Project Preparation
Before work begins, your contractor will:
- Obtain necessary permits from local building department
- Order materials and schedule delivery
- Review job scope and timeline with you
- Set up material staging area and dumpster
Tear-Off Old Roofing
The crew removes all existing roofing materials:
- Shingles stripped down to roof deck
- Old flashing, vents, and penetrations removed
- Debris collected in tarps and disposed
- Typical time: 2-4 hours for average home
Deck Inspection & Repair
Critical step for long-term performance:
- Inspect plywood/OSB decking for rot or damage
- Replace any compromised sections
- Verify proper nailing and structural integrity
- Additional cost may apply for deck repairs
Install Underlayment & Components
Critical waterproofing layer installation:
- New drip edge installed at eaves and rakes
- Ice and water shield at vulnerable areas (valleys, eaves)
- Synthetic underlayment across entire deck
- New flashing at chimneys, vents, and walls
Install New Shingles
The main installation phase:
- Starter strip shingles along eaves
- Field shingles installed from bottom up
- Proper nail placement per manufacturer specs
- Valleys, hips, and ridges receive special treatment
Finishing & Ventilation
Complete the installation:
- Ridge cap shingles installed
- Ridge vents for proper attic ventilation
- Pipe boots and penetration sealing
- Final nail sealing as needed
Cleanup & Final Inspection
Project completion:
- All debris removed from property
- Magnetic nail sweep of yard and driveway
- Final walkthrough with homeowner
- Warranty documentation provided
Typical Timeline
Most residential shingle replacements are completed in 1-3 days depending on size, complexity, and weather conditions.
Roof Shingle Replacement Costs
Understanding cost factors helps you budget accurately and avoid surprises.
Average Cost Ranges (2025)
Small Home (1,000-1,500 sq ft)
$5,000-$8,000
Average Home (1,500-2,500 sq ft)
$8,000-$15,000
National Average: ~$10,000
Large Home (2,500-3,500 sq ft)
$15,000-$25,000
Key Cost Factors
Roof Size
Largest factor. Measured in "squares" (100 sq ft each). Most homes are 15-35 squares.
Shingle Type
3-tab vs architectural vs designer. Architectural adds $20-40/square over 3-tab.
Roof Pitch
Steeper roofs (above 6/12) require safety equipment and more labor time.
Roof Complexity
Multiple valleys, dormers, skylights, and chimneys increase labor and materials.
Deck Repairs
Replacing rotted plywood/OSB adds cost. Typically $50-100 per 4x8 sheet installed.
Geographic Location
Labor rates and material costs vary by region. Coastal areas may require higher-rated materials.
Get an accurate estimate for your specific home:
View Detailed Cost Guide for Myrtle Beach →DIY vs Professional Installation
While some homeowners consider DIY, roof replacement presents significant challenges.
⚠️ Why DIY Roof Replacement is Risky
- ✗Safety Hazards
Falls from roofs cause thousands of injuries annually. Professional crews have safety training and equipment.
- ✗Voided Warranties
Most manufacturer warranties require professional installation. DIY voids these protections.
- ✗Code Compliance
Building codes require permits and inspections. Improper work can affect home sales and insurance.
- ✗Hidden Damage
Professionals know how to identify and address underlying issues you might miss.
- ✗Time Investment
A crew completes in 1-2 days what takes DIYers multiple weekends.
✓ Benefits of Professional Installation
- ✓Full Warranty Protection
Material AND workmanship warranties. GAF Master Elite contractors offer 25-year labor coverage.
- ✓Insurance Protection
Licensed contractors carry liability insurance. You're protected if anything goes wrong.
- ✓Proper Installation
Certified installers follow manufacturer specifications ensuring maximum shingle life.
- ✓Permit Handling
Contractors manage permits, inspections, and code compliance.
- ✓Complete Cleanup
Debris removal, nail sweeps, and property protection included.
When Minor Shingle Repairs Are Okay for DIY:
Replacing 1-3 damaged shingles on a low-pitch roof with safe access, using matching shingles, for a roof under 10 years old. For anything more extensive, professional installation is strongly recommended.
How to Choose a Roofing Contractor
Selecting the right contractor is as important as choosing the right shingles.
✓ What to Look For
- ✓Valid License & Insurance
Verify state contractor license and liability insurance. Ask for certificates.
- ✓Manufacturer Certifications
GAF Master Elite, CertainTeed SELECT, or Owens Corning Preferred certification indicates quality commitment.
- ✓Local Presence
Established local business with physical address. Avoid "storm chasers" from out of state.
- ✓Written Estimate & Contract
Detailed scope of work, materials specified, total price, and payment terms in writing.
- ✓Workmanship Warranty
Labor warranty in addition to manufacturer material warranty. Look for 5+ years minimum.
✗ Red Flags to Avoid
- ✗Demanding Full Payment Upfront
Standard practice is deposit at signing, balance upon completion. Never pay 100% upfront.
- ✗No Written Contract
Verbal agreements leave you unprotected. Always get everything in writing.
- ✗High-Pressure Sales Tactics
"Sign today or lose this price" is a warning sign. Reputable contractors give you time to decide.
- ✗Door-to-Door After Storms
"Storm chasers" often do poor work and disappear. Work with established local companies.
- ✗No Physical Address
Contractors with only cell phones and P.O. boxes may be fly-by-night operations.
Frequently Asked Questions
Common questions about roof shingle replacement
How long does roof shingle replacement take?
Most residential roof shingle replacements take 1-3 days depending on roof size, complexity, and weather conditions. A typical 2,000 square foot home can often be completed in 1-2 days by an experienced crew.
How much does roof shingle replacement cost?
Roof shingle replacement costs typically range from $8,000 to $15,000 for most homes, depending on size, materials, and location. The national average is around $10,000. Factors like roof complexity, shingle type, and regional labor rates affect final pricing.
How often should roof shingles be replaced?
Asphalt shingles typically last 20-30 years depending on quality. 3-tab shingles last 15-20 years, while architectural shingles last 25-30 years. Climate, maintenance, and installation quality affect lifespan.
Can I put new shingles over old ones?
While technically possible in some cases, "overlay" or "re-roof" is not recommended. It adds weight, hides underlying damage, voids some warranties, and doesn't last as long. Most professionals recommend full tear-off.
What is the best type of shingle for roof replacement?
Architectural (dimensional) shingles are the best choice for most homeowners. They offer superior durability (25-30 year lifespan), better wind resistance (up to 130 MPH), and enhanced curb appeal compared to 3-tab shingles.
Does homeowners insurance cover roof replacement?
Homeowners insurance typically covers roof replacement if damage is caused by covered perils like storms, hail, fire, or falling trees. Normal wear and aging are not covered. Document damage promptly and work with a contractor experienced in insurance claims.
What is the best time of year to replace roof shingles?
Late spring through early fall offers the best conditions for roof replacement. Moderate temperatures (40-85°F) allow proper shingle sealing. However, professional contractors can work year-round with appropriate precautions.
Should I be home during roof replacement?
You don't need to be home for the entire project. However, it's recommended to be present for the initial walkthrough and final inspection. Notify the contractor how to reach you if questions arise.
Will roof replacement increase my home value?
Yes, a new roof can increase home value and makes selling easier. Studies show homeowners recover 60-70% of roof replacement costs at sale. More importantly, a failing roof can be a deal-breaker for buyers.
How do I prepare for roof shingle replacement?
Move vehicles away from the house, remove or secure items in the attic, take down wall decorations that might shake loose, trim tree branches near the roof, and ensure clear access to the work area.
Need Roof Shingle Replacement in South Carolina?
WeatherShield Roofing is a GAF Master Elite certified contractor serving Myrtle Beach and the Grand Strand region. Get a free inspection and estimate today.