What Are Roof Warranties and What Do They Cover in Louisville?
Understanding Roof Warranties
Roof warranties are the most misunderstood aspect of a roofing project. Here's a plain-English guide to what you're actually getting.
The Two Types of Roof Warranties
1. Manufacturer's Material Warranty
This warranty comes from the company that made the shingles (TAMKO, GAF, Owens Corning, etc.). It covers manufacturing defects — problems with the shingles themselves, not how they were installed.
What it typically covers:
- Premature granule loss
- Cracking or splitting due to manufacturing defects
- Algae staining (if shingles have algae-resistant technology)
- Wind blow-off up to the rated speed (if shingles were properly installed)
What it does NOT cover:
- Normal wear and tear
- Storm damage (that's insurance)
- Installation errors (that's the workmanship warranty)
- Damage from foot traffic, falling branches, or external causes
- Cosmetic issues that don't affect performance
Duration: 25 years to "lifetime" depending on the product line.
Important detail: "Lifetime" doesn't mean forever. Most manufacturer lifetime warranties are prorated after 10–15 years, meaning the manufacturer's payout decreases over time.
2. Contractor's Workmanship Warranty
This warranty comes from the company that installed your roof. It covers installation errors — leaks, failures, or damage caused by improper installation technique.
What it typically covers:
- Leaks caused by improper nail placement
- Flashing failures
- Improper underlayment installation
- Poor valley construction
- Any defect traceable to how the work was done
Duration: Varies wildly. Some contractors offer 1 year. Some offer 5 years. Some offer 10 years or more. The length of the workmanship warranty is one of the most important differentiators between contractors.
Enhanced Warranties Through Certified Installers
Here's where manufacturer certifications pay off. Certified installers (TAMKO Pro, GAF Master Elite, etc.) can offer enhanced warranty packages that combine material and workmanship coverage:
- TAMKO Pro: Extended workmanship coverage through the manufacturer
- GAF Golden Pledge: 50-year material + 25-year workmanship backed by GAF
- Owens Corning Platinum: Lifetime material + lifetime workmanship
These enhanced warranties are only available through certified contractors. A non-certified installer using the same shingles can only offer the basic material warranty.
What Voids Your Warranty
- Improper installation — high nailing, wrong fasteners, insufficient overlap
- Lack of ventilation — inadequate attic airflow causes premature shingle failure
- Unauthorized modifications — satellite dish installation, skylights added without proper flashing
- Failure to maintain — clogged gutters, overhanging branches, moss accumulation
- Walking on the roof — foot traffic can crack and damage shingles
Questions to Ask About Your Warranty
- Is the material warranty prorated or non-prorated?
- How long is the workmanship warranty?
- Is the workmanship warranty transferable if I sell my home?
- What specifically is excluded?
- How do I file a warranty claim?
Homestretch Roofing offers industry-leading warranty protection as a TAMKO Pro Certified installer. Call (502) 208-5432 for details.
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About Michael Nielsen
Michael Nielsen is the owner of Homestretch Roofing, serving Louisville, Kentucky, and surrounding communities for over 15 years. A TAMKO Pro Certified contractor, BBB A+-rated business owner, and Leo Weekly Readers' Choice Award winner, Mike personally oversees every project — from the initial inspection to the final walk-through. He's passionate about transparency, education, and helping Louisville homeowners make confident roofing decisions.
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