Manufacturer vs Workmanship Warranty | Wannamaker

You just got a new roof, and someone hands you a warranty. Maybe two. You file them away and assume you're covered for the next 25 years. Then a leak shows up four years later, and you find out neither warranty applies to your specific problem. This happens constantly in San Antonio — and it's almost always because nobody explained what each warranty actually covers. Let's fix that.

Two Warranties, Two Completely Different Things

Every professional roof replacement comes with two separate warranties. They cover different problems, come from different sources, and have different expiration dates. Mixing them up — or assuming one covers what the other doesn't — is where homeowners get burned.

The Manufacturer Warranty

This comes from the company that made your shingles, tiles, or metal panels — GAF, Owens Corning, CertainTeed, etc. It covers defects in the roofing material itself. If a shingle cracks, curls, or fails prematurely under normal conditions because of a manufacturing flaw, this is the warranty that's supposed to kick in.

Manufacturer warranties typically range from 25 years to "lifetime" for asphalt shingles, and 30-50 years for metal roofing. But here's what they don't tell you on the sales pitch:

• "Lifetime" doesn't mean your lifetime. Most manufacturers define it as the "reasonable useful life" of the product — which they determine. Many cap material reimbursement at the original cost of the shingles, prorated over time.
• Labor is usually excluded. A standard manufacturer warranty covers the cost of replacement materials. It does not cover the labor to tear off the failed shingles and install new ones. That labor cost is often 60-70% of the total job.
• Proration reduces your payout over time. A 30-year warranty that's prorated means you might get 50% of material cost covered at year 15, and almost nothing at year 25.
• Enhanced or "system" warranties are different. Some manufacturers offer upgraded warranties when a certified contractor installs a full system of their products (shingles, underlayment, ridge caps, starter strips — all same brand). These enhanced warranties sometimes include labor coverage for 10-25 years. They cost more, but the coverage is substantially better.

The Workmanship Warranty

This comes from your roofing contractor — the company that actually installed the roof. It covers installation errors: improper nailing patterns, bad flashing work, poor ventilation setup, incorrectly sealed valleys, underlayment mistakes. Basically, if the materials were fine but the installation was wrong, the workmanship warranty is what protects you.

Workmanship warranties vary wildly in the roofing industry. Some contractors offer 2 years. Some offer 10. Some say "lifetime" but won't be in business in 5 years. The warranty is only as good as the company standing behind it.

The Gap That Costs Homeowners Money

Here's the scenario we see regularly: A homeowner has a leak at a pipe boot or along a wall flashing. They call the manufacturer. The manufacturer sends an inspector who determines the shingles are performing as designed — the leak is an installation issue. Not covered.

The homeowner then calls their installer. The installer either went out of business, won't return calls, or points to a 2-year workmanship warranty that expired. The homeowner is stuck paying out of pocket for a problem that should have been covered.

This is why the workmanship warranty matters more than most people realize — and why choosing a contractor based solely on the lowest bid is risky. The cheapest bid often comes with the shortest workmanship warranty from the least established company.

What Voids Each Warranty

Manufacturer Warranty Killers

• Improper ventilation. If your attic doesn't have adequate intake and exhaust ventilation, most manufacturers will deny a claim. Heat buildup in a San Antonio attic can cook shingles from below — and the manufacturer will say that's not their fault.
• Pressure washing. Cleaning granulated shingles with a pressure washer voids most warranties immediately.
• Unauthorized modifications. Adding a satellite dish, solar panels, or a new penetration without following the manufacturer's guidelines can void coverage.
• Acts of God. Hail, hurricanes, and tornadoes are not manufacturing defects. That's what your homeowner's insurance is for — and we can help with your insurance claim if storm damage hits.

Workmanship Warranty Killers

• Hiring another contractor to work on the roof. If someone else modifies the installation, the original contractor's workmanship warranty is typically voided.
• Neglecting maintenance. Letting debris pile up in valleys, ignoring clogged gutters, or failing to address minor issues can give a contractor grounds to deny a claim.
• The company closes. No company, no warranty. Period. This is the single biggest risk with workmanship warranties from fly-by-night storm chasers who roll through San Antonio after every hail event.

How to Protect Yourself on Both Sides

Here's what we tell every homeowner who's comparing roof replacement cost estimates:

• Ask for the workmanship warranty in writing before signing. Not a verbal promise — a written document that spells out duration, what's covered, and what's excluded.
• Check how long the contractor has been in business. A 10-year workmanship warranty from a company that's been operating for 12 years is far more credible than a "lifetime" warranty from a crew that started last spring.
• Ask about enhanced manufacturer warranties. A certified contractor can often register your roof for an upgraded warranty that includes labor coverage. This closes the gap between the two warranties significantly.
• Schedule periodic inspections. A free roof inspection every couple of years catches small issues before they become warranty-voiding neglect.
• Keep your paperwork. Store both warranties, your installation contract, and any inspection reports. You'll need them if you ever file a claim with either party.

The Bottom Line on Roof Warranties

The manufacturer warranty protects you from bad materials. The workmanship warranty protects you from bad installation. You need both, and you need both to be strong. The manufacturer warranty is largely determined by the product you choose. The workmanship warranty is entirely determined by the contractor you hire. Choose accordingly.

Most roof failures we see across San Antonio, Stone Oak, and the surrounding Hill Country aren't material defects — they're installation problems. Nails in the wrong spot, flashing that wasn't sealed properly, ventilation that was never balanced. The materials were fine. The labor wasn't. That's why we believe the workmanship warranty is the single most important document in your roofing contract.