What a Roof Warranty Actually Covers | Wannamaker

Somewhere in a drawer or a filing cabinet, you probably have a roof warranty. Maybe two of them. Most San Antonio homeowners don't pull those documents out until a leak shows up or a storm rolls through — and that's exactly when the unpleasant surprises hit. The warranty you assumed covered everything might cover almost nothing. Let's fix that right now by breaking down what roof warranties actually do, what they exclude, and the one mistake that voids nearly all of them.

Two Warranties, Two Very Different Things

When you get a roof replacement, you should receive two separate warranties. They come from different sources, cover different problems, and have different lifespans. Confusing them is the number-one reason homeowners get frustrated during a warranty claim.

1. Manufacturer's Material Warranty

This warranty comes from the company that made your shingles, tiles, or metal panels — think GAF, Owens Corning, CertainTeed, or similar. It covers defects in the roofing material itself. If a shingle cracks, curls, or loses granules prematurely because of a manufacturing flaw, the manufacturer will typically cover material replacement costs.

Here's what catches people off guard:

• Coverage is usually prorated. A "30-year warranty" doesn't mean free materials for 30 years. After the initial non-prorated period (often 10 years), you'll pay an increasing share of the cost.
• Labor is rarely included. The standard manufacturer warranty covers materials only. Someone still has to tear off the old roof and install the new one — and that's on you unless you have an enhanced warranty.
• Enhanced or system warranties exist — but they require specific installation. GAF's Golden Pledge and Owens Corning's Platinum Protection, for example, include labor coverage. But they require your contractor to be factory-certified and to install a complete system of that manufacturer's products (underlayment, starter strips, ridge caps, ventilation). Miss one component and you're back to the basic warranty.
• Transferability varies. Some warranties transfer to a new homeowner if you sell, some don't, and some only transfer once within a limited window.

2. Workmanship (Contractor) Warranty

This warranty comes from the roofing company that did the installation. It covers installation errors — things like improper flashing, poor nail placement, inadequate ventilation setup, or incorrectly sealed valleys. If your roof leaks because something was installed wrong, the workmanship warranty is what protects you.

Workmanship warranties vary wildly across contractors. Some San Antonio roofers offer 2 years. Others offer 10. A few offer lifetime coverage. The duration matters less than the stability of the company behind it. A lifetime warranty from a company that folds in 18 months is worth exactly nothing.

At Wannamaker Roofing, we've been in San Antonio since 2012. We stand behind our work because we plan to be here when you call — whether that's next month or next decade.

What Roof Warranties Do NOT Cover

This is where most of the frustration lives. Both manufacturer and workmanship warranties have exclusions, and they're longer than you'd expect.

• Storm damage. Hail, wind, tornadoes, flying debris — none of this is covered by your roof warranty. That's what your homeowner's insurance is for. If you've taken hail damage, you'll want to file an insurance claim, not a warranty claim.
• Damage from foot traffic. Satellite dish installers, HVAC techs, holiday light crews — anyone walking on your roof can cause damage that voids coverage in that area.
• Improper ventilation (on material warranties). If your attic ventilation doesn't meet manufacturer specs, the material warranty can be voided entirely. This is a huge issue in San Antonio where summer attic temps can exceed 150°F. Trapped heat accelerates shingle degradation, and manufacturers will point to inadequate ventilation as the cause.
• Additions or modifications. Had a skylight added? Solar panels installed? A new vent cut? If a different contractor did that work and compromised the roof system, your original warranties may not cover the resulting damage.
• Neglect and lack of maintenance. Clogged gutters, moss growth, accumulated debris — if the manufacturer or contractor can argue that basic maintenance would have prevented the issue, they can deny the claim.
• Acts of God. Earthquakes, floods, and other catastrophic events are excluded from virtually every roof warranty.

The One Thing That Voids Almost Every Warranty

Hiring an unauthorized contractor to do work on your roof after installation. It sounds simple, but it happens constantly. A homeowner notices a small leak, calls a handyman or a different roofer for a quick patch, and that repair — however well-intentioned — voids the workmanship warranty and potentially the manufacturer warranty too.

If you need a roof repair, always call the contractor who installed the roof first. If that company no longer exists (a real risk with fly-by-night storm chasers), contact the manufacturer to ask about approved contractors who can perform repairs without voiding coverage.

How to Protect Your Warranty in the San Antonio Climate

San Antonio's combination of intense UV exposure, severe hailstorms, and occasional heavy rain makes roof maintenance more important here than in milder climates. A few practical steps will keep your warranty intact and your roof performing longer:

• Schedule regular inspections. A professional roof inspection every 1-2 years creates a documented maintenance history — exactly what you'd need to support a warranty claim.
• Keep your attic properly ventilated. Ensure intake and exhaust vents are unobstructed. This is non-negotiable for warranty compliance on asphalt shingle roofs.
• Document everything. Save your installation contract, warranty certificates, inspection reports, and any correspondence with your contractor or manufacturer. Digital copies are fine.
• Don't let just anyone on your roof. Coordinate with your roofing contractor before allowing other trades to access the roof surface.
• Address problems early. A minor flashing issue that goes unrepaired for two years becomes a "lack of maintenance" argument for a warranty denial.

What to Look for When Comparing Warranties

If you're shopping for a new roof in the San Antonio, Stone Oak, Alamo Heights, or Boerne area, don't just compare shingle colors and price quotes. Ask these specific warranty questions:

• How long is the non-prorated period? This is the window where you get full material coverage with no depreciation.
• Does the warranty include labor? If not, ask what an enhanced warranty upgrade costs. It's often worth it.
• How long is the workmanship warranty? And is it backed by a company with a real track record in the area?
• What are the specific exclusions? Get them in writing before you sign.
• Is the warranty transferable? This matters for resale value.

The Bottom Line

A roof warranty is only as good as your understanding of it. The manufacturer covers material defects. The contractor covers installation errors. Nobody covers storm damage, neglect, or unauthorized modifications. Keep your paperwork, maintain your roof, and choose a contractor who'll still be answering the phone when you need them. That's the real warranty.