Roof Warranty Guide: What South Carolina Homeowners Should Know

By Dubya Roofing & Gutters | January 05, 2026 | 7 min read

A new roof is one of the biggest investments you will make in your home, and the warranty that comes with it is your protection against defects and failures. But roof warranties can be confusing, with different types, terms, and exclusions that vary by manufacturer and contractor. Here is what every South Carolina homeowner needs to understand about roof warranties.

Types of Roof Warranties

Manufacturer Warranty (Materials)

The manufacturer warranty covers defects in the roofing materials themselves. If shingles crack, lose granules prematurely, or fail to perform as specified due to a manufacturing defect, this warranty provides coverage. Most asphalt shingle manufacturers offer warranties ranging from 25 years to lifetime, though the terms and coverage levels vary significantly.

Workmanship Warranty (Installation)

The workmanship warranty comes from your roofing contractor and covers errors in the installation process. If a leak develops because flashing was installed incorrectly or nails were placed improperly, the workmanship warranty covers the repair. These warranties typically range from 2 to 25 years depending on the contractor. At Dubya Roofing and Gutters, we stand behind our installation with comprehensive workmanship coverage.

Extended or Enhanced Warranties

Some manufacturers offer enhanced warranties that combine material and workmanship coverage when certified contractors install their products. These premium warranties often cover both materials and labor for the full warranty period and may include non-prorated coverage. Ask your contractor about certification programs from major shingle manufacturers.

What Can Void Your Roof Warranty

Several common actions can void your roof warranty. Inadequate attic ventilation is the most frequent warranty voider in South Carolina. Walking on the roof, installing satellite dishes or solar panels without proper procedures, having unlicensed contractors perform repairs, applying coatings not approved by the manufacturer, and failing to perform basic maintenance can all void coverage.

Prorated vs Non-Prorated Coverage

Understanding proration is critical. A prorated warranty reduces the coverage amount as the roof ages. A 30-year prorated warranty might cover 100 percent of costs in year 5 but only 30 percent in year 20. Non-prorated warranties cover the full cost regardless of age, making them significantly more valuable. Always read the fine print to understand how proration affects your specific warranty.

How to Protect Your Warranty

Keep all warranty documents and receipts in a safe place. Schedule annual roof inspections and keep records of maintenance. Use only licensed contractors for any repairs. Ensure your attic ventilation meets manufacturer requirements. Document any storm damage promptly and file insurance claims in a timely manner. Following these practices protects both your warranty and your investment.

Questions to Ask Before Signing

Before agreeing to a roof replacement, ask your contractor: What manufacturer warranty comes with these materials? What is your workmanship warranty period? Is the coverage prorated or non-prorated? What actions could void the warranty? Are you certified by the shingle manufacturer for enhanced warranty coverage? Get all answers in writing. Call Dubya Roofing at (803) 855-1850 for transparent warranty information.