A roofing warranty isn't a single document — it's two separate protections from two different parties. Understanding the difference between them, what each one actually covers, and what can void them is essential before signing any roofing contract in Chicagoland.
A Chicagoland roof replacement comes with two separate warranties: a manufacturer's material warranty (from the shingle company — covers product defects, typically 25 years to lifetime) and a contractor's workmanship warranty (from the installer — covers installation errors, typically 1–10 years). They cover different things and are issued by different parties. Neither covers storm damage, which is a homeowner's insurance claim.
Warranty language in roofing sales conversations is frequently oversimplified. "Lifetime warranty" is probably the most overused phrase in the industry — it sounds comprehensive, but it describes a product warranty on the shingles themselves, not a guarantee that your roof will perform without problems for as long as you own the house. The two warranties that matter for a roof replacement are the manufacturer's material warranty and the contractor's workmanship warranty. They cover different things, have different terms, and are issued by different parties.
The distinction matters practically. When a roof fails early, the question of which warranty applies — and whether either party will honor a claim — depends on understanding exactly what went wrong and who was responsible for it. We've seen homeowners surprised to learn that a "50-year warranty" shingle had a valid claim denied because the attic ventilation didn't meet the manufacturer's requirements. Understanding these terms before the job goes on is far better than discovering the limitations after a problem develops.
This warranty comes from the company that made the shingles — GAF, Owens Corning, CertainTeed, Atlas, and others. It covers manufacturing defects in the product: shingles that crack, delaminate, or lose granules prematurely due to a flaw in the material itself. The duration ranges from 25 years (entry-level products) to "lifetime" (premium architectural shingles), though "lifetime" in manufacturer terms typically means the expected useful life of the product — often defined in the warranty document as a set number of years for coverage purposes.
The critical point about manufacturer warranties: they don't cover installation errors. If shingles were improperly nailed, installed without adequate underlayment, or put on a deck with inadequate ventilation, and those shingles fail, the manufacturer's warranty generally does not apply. The manufacturer will inspect and will ask about installation conditions. This is why installation quality matters enormously regardless of the warranty on the box.
Premium manufacturer warranty programs — GAF's System Plus or Golden Pledge, for example — require installation by a certified contractor and cover a broader range of conditions, including some installation-related issues. These are worth asking about for a major replacement project.
This warranty comes from the contractor who installed the roof. It covers errors in installation — improper flashing, incorrect nailing, missed penetrations, inadequate underlayment application — and is your primary protection against the roof failing because of something that was done wrong during installation rather than a product defect.
Workmanship warranties range from 1 year to 25 years depending on the contractor. The duration is a meaningful signal: a contractor offering a 1-year workmanship warranty is either not confident in their installation or not planning to be in business long enough to honor anything longer. We consider 10 years a reasonable baseline for a contractor who stands behind their work. A workmanship warranty is only as valuable as the company that issued it — a warranty from a contractor who goes out of business in year 3 is not enforceable.
Ask specifically: what does the workmanship warranty cover, and what doesn't it cover? Some contractors use broad language that sounds comprehensive but excludes common failure modes. Read the actual document, not just the marketing language around it.
The three dominant manufacturers in the Chicagoland market each have tiered warranty programs. Here's how their flagship programs compare at a glance.
| Feature | GAF System Plus | Owens Corning Platinum | CertainTeed SureStart Plus |
|---|---|---|---|
| Coverage period | Lifetime (non-prorated 50 yrs) | Lifetime (non-prorated 50 yrs) | Lifetime (SureStart 10 yrs) |
| Wind coverage | Up to 130 mph | Up to 130 mph | Up to 110 mph (standard) |
| Algae resistance | 10-year StainGuard Plus | 10-year StreakGuard | 10-year (with StreakFighter) |
| Transferable? | Yes — one time, fee applies | Yes — one time, fee applies | Yes — one time, fee applies |
| Certified installer required? | Yes — GAF Master Elite | Yes — Owens Corning Preferred | Yes — CertainTeed SELECT |
Warranty terms vary by product line and are updated periodically. Always request the current warranty document — not just the marketing summary — before signing a contract.
Most manufacturer warranty voidances come down to a few recurring factors. Understanding them before installation is far more useful than discovering them during a claim.
This is the most frequently cited warranty denial factor we're aware of in the industry. GAF, Owens Corning, and CertainTeed all require a minimum ventilation ratio — typically 1:150 (one square foot of net free ventilation per 150 square feet of attic floor area) or 1:300 when a vapor retarder is present. If an inspector determines the attic ventilation was inadequate at the time of installation, the claim can be denied even if the shingles themselves appear to have failed. See our attic ventilation page for more on why this matters and what proper ventilation looks like.
Shingles installed outside of the manufacturer's specifications — wrong nail size, wrong nailing zone, improper overlap, wrong starter strip application — give the manufacturer grounds to dispute a claim. This is why it matters that your contractor actually knows and follows the installation instructions for the specific product being installed, not just a general "how to shingle a roof" approach.
Installing new shingles over an existing layer of shingles (a "reroof" or "layover") is generally not covered by manufacturer warranties or is covered at a significantly reduced level. A proper tear-off exposes the deck so it can be inspected and repaired, allows new underlayment to be installed, and gives the new shingles a flat, sound surface. Layovers save on labor and disposal cost but trade away warranty coverage and hide deck problems that may already exist.
If a satellite dish installer, HVAC contractor, or another trade cuts through the new roof without following the manufacturer's approved flashing methods, any damage that results from that penetration may not be covered. Keep documentation of any third-party work done on the roof after installation.
Neither the manufacturer warranty nor the workmanship warranty covers storm damage — hail, wind, falling debris, or ice dam damage. These are covered, if at all, by your homeowner's insurance policy. Manufacturer warranties cover product defects, and workmanship warranties cover installation errors. A hailstorm that punctures shingles or a wind event that strips them is an insurance claim, not a warranty claim.
That said, storm damage sometimes reveals pre-existing installation issues. An adjuster who finds improperly installed flashing around a chimney while inspecting hail damage will note it, and the resulting leak claim may be complicated by the question of whether the failure was storm-related or pre-existing. This is another reason why installation quality matters well beyond the immediate post-installation period.
We document the condition of the roof thoroughly at the time of any replacement or major repair, which creates a baseline record that can be useful later if a storm damage dispute arises. See our insurance claims page for more on how we work with homeowners through claim processes.
Manufacturer warranties on shingles are typically transferable to new owners — but the transfer doesn't happen automatically at closing, and there are usually rules: a fee, a notification deadline (often 30–60 days after the sale), and in some cases a reduction in remaining coverage. GAF's System Plus warranty, for example, allows one transfer within 20 years of installation for a fee, after which the new owner receives coverage for the remainder of the original term. CertainTeed's SureStart Plus warranty has similar provisions.
A properly transferred warranty adds demonstrable value to a home sale. Buyers appreciate knowing there's documented manufacturer coverage remaining on the roof. The alternative — a roof with warranty coverage that wasn't properly transferred — means the new owner effectively has no warranty even if the original document says years remain.
If you're planning to sell your home and have a relatively new roof, ask your contractor to pull the original documentation and walk you through the transfer process. For workmanship warranties: whether they're transferable depends on the contractor's policy. Ask before assuming they carry over to a buyer.
We've been installing roofs in the Chicagoland area since 1996. Here's exactly what we stand behind:
Covers installation errors — flashing, penetrations, nailing, underlayment. If something fails because of how it was installed, we come back and fix it. In writing, on every contract.
We install GAF and Owens Corning products with full manufacturer warranty coverage. We'll provide the warranty documentation at job completion and can walk you through registration.
A warranty is only as good as the company honoring it. Nearly 30 years in Chicagoland means we'll be here when you need us — not just when you sign the contract.
IL Roofing License #104.010248 · Serving Cook, Lake & DuPage Counties · Request a free estimate
Manufacturer warranties cover defects in the shingle material itself — cracking, granule loss, or other product failures that occur within the warranty period under normal conditions. They don't cover damage caused by weather events, improper installation, or failure to meet the manufacturer's ventilation requirements. The most important thing to understand is that a manufacturer warranty is only as good as the installation. If shingles are installed by a contractor who doesn't follow manufacturer specifications — wrong nailing pattern, improper underlayment, inadequate ventilation — and those shingles fail early, the manufacturer will inspect and, if they determine installation error was a contributing factor, deny the claim.
Several things can void or limit a manufacturer warranty: improper installation (not following the manufacturer's nailing, overlap, and underlayment specifications), attic ventilation that doesn't meet the manufacturer's required ratios (typically 1:150 or 1:300 with a vapor retarder), installation over an existing layer of shingles (layover) without manufacturer approval, and structural modifications to the roof deck after installation. Third-party penetrations installed without following manufacturer-approved flashing methods can also be grounds for a partial warranty denial. Workmanship warranties are typically voided by any subsequent work on the roof by another contractor without prior authorization.
Workmanship warranties vary widely — from 1 year (common among lower-tier contractors) to 10, 15, or even 25 years from more established companies. The industry standard that credible contractors typically offer is 5–10 years. We consider 10 years to be the baseline for what a serious roofing contractor should stand behind. A very short workmanship warranty (1–2 years) is a signal worth paying attention to when comparing proposals — it often reflects the contractor's own confidence in the quality of their work or the stability of their business. A workmanship warranty is only as good as the company still being in business to honor it.
Manufacturer warranties are typically transferable, though the process and costs vary by manufacturer. GAF allows a one-time transfer of most of their warranties within a certain period after the original installation, often with a transfer fee and in some cases a reduction in remaining coverage. Owens Corning and CertainTeed have similar programs. The key is that the transfer must be done properly and within the allowed window — it doesn't transfer automatically at closing. Workmanship warranties from contractors may or may not be transferable; this should be clarified before you close on a sale. A roof warranty that can be properly documented and transferred adds real value to a property sale and is worth managing correctly.
GAF's System Plus and Golden Pledge are enhanced warranty programs that go beyond a standard manufacturer warranty. They require installation by a GAF-certified contractor and cover a broader scope — including some installation-related issues that a standard manufacturer warranty would exclude. System Plus covers 100% of material costs with no prorated reduction for a set term. Golden Pledge, the most comprehensive tier, also covers workmanship and requires an inspection by GAF. Whether it's worth the additional cost depends on project size and risk tolerance. For a large residential replacement or commercial project, the expanded coverage is worth understanding before choosing a contractor.
Neither manufacturer warranties nor workmanship warranties cover ice dam damage — that's a homeowner's insurance claim, not a warranty claim. Ice dams form when heat escapes through the roof deck, melts snow at the top of the roof, and refreezes at the cold eaves. The resulting ice backup can force water under shingles. Proper attic insulation and ventilation dramatically reduce ice dam risk, and we use ice-and-water shield at the eaves as required by code for this climate. If ice dam damage occurs on a newer roof, the relevant question is whether the underlayment installation and ventilation were correct — that would be a workmanship question, not a material defect.
For a manufacturer warranty claim, contact the shingle manufacturer directly — GAF, Owens Corning, or CertainTeed each have claim processes on their websites. You'll need the original installation documentation: the contractor name, install date, product model, and ideally the original warranty registration number. The manufacturer will typically send an inspector. For a workmanship warranty claim, contact the contractor who installed the roof, document the issue with photos before any temporary repairs, and reference the warranty document. If the contractor is no longer in business, a workmanship warranty from them is effectively unenforceable — which is one reason contractor longevity matters when choosing who installs your roof.
We'll walk you through what you have and what it covers. No pressure.