Manufacturer warranty
Covers defects in the product. Many are prorated. Enhanced versions often require a certified installer and a full system of their products.
Workmanship warranty
Covers installation mistakes. Get its length and terms in writing.
Things that can void warranties
- Overlaying old shingles
- Poor ventilation
- Unauthorized repairs
- Not registering the warranty
Why two separate warranties exist
A roof has two things that can fail: the material itself and the way it was put on. That is why most roofs are covered by two different warranties from two different parties, the manufacturer and the installer, and why it helps to understand each one before you sign anything.
What a manufacturer warranty typically covers
This warranty comes from the company that made the shingles, membrane, or metal panels, and it generally covers manufacturing defects in the material itself, not installation mistakes. Coverage is often prorated over time, meaning it pays less as the roof ages. Enhanced or extended manufacturer coverage usually requires a full system of that manufacturer's components and installation by a certified installer.
What a workmanship warranty typically covers
This warranty comes from the roofer, not the manufacturer, and it covers problems caused by how the roof was installed, such as a flashing detail that was done incorrectly or fasteners that were not seated properly. Its length and terms vary by company, so get them in writing and ask what is and is not included before work begins.
Registering your warranty
Many manufacturer warranties require registration within a set window after installation to activate full coverage, and missing that window can reduce what is covered later. Ask the roofer whether they handle registration for you or whether it is something you need to do yourself, and get confirmation once it is done.
Can a warranty transfer to a new owner?
Some manufacturer and workmanship warranties can be transferred to a new homeowner if you sell, often within a limited time after the sale and sometimes for a transfer fee. This can be a selling point, so keep your original paperwork and ask the roofer about transfer terms in general before you need them.
Common things that can void a warranty
Warranties are not unconditional. General examples that can affect coverage include installing new shingles over old layers instead of a proper roof replacement, inadequate attic ventilation, unauthorized repairs by someone other than a qualified roofer, and skipping registration. Always read the specific terms for your material and installer rather than assuming.
- Overlaying new shingles on top of old ones
- Poor or blocked attic ventilation
- Repairs done by an unauthorized or unlicensed party
- Failing to register the warranty within the required window
- Using incompatible accessory products on the same roof system
Warranties on repairs versus full replacements
A targeted roof repair usually carries a shorter, simpler workmanship warranty than a full system replacement, since fewer components are involved. If a roof has had multiple past repairs from different companies, it can be harder to know who is responsible if something fails, which is one more reason the repair vs. replace decision matters.
Questions to ask before you sign
Before accepting any roofing estimate, ask what warranty terms apply to materials, what terms apply to labor, how long each one lasts, and what specifically would void the coverage. Get the answers in writing, not just a verbal assurance.
Warranty coverage by material type
Warranty structure and length can vary quite a bit between roofing materials. A standard asphalt shingle roofing system has different manufacturer terms than a metal roofing system, and commercial membranes like TPO or EPDM often carry their own manufacturer coverage tied to approved installers and seam practices. Ask specifically about the warranty that applies to the material being proposed, not a generic answer.
Keeping your warranty paperwork organized
Store your manufacturer warranty certificate, workmanship warranty document, final invoice, and any registration confirmation together in one place, physical or digital. If a problem comes up years later, or if you sell the home, having this paperwork ready can make the difference between a smooth claim and a stalled one.
- Manufacturer warranty certificate or registration confirmation
- Workmanship warranty document from the roofer
- Final invoice listing materials and installation date
- Any inspection reports or photos from the original project
Warranties after storm repair work
When a roof is repaired or replaced after storm damage, ask how the new warranty applies to the repaired section versus the rest of the roof. Mixing an older roof section with a newly warrantied repair can create confusion later about which coverage applies where, so get this spelled out in the paperwork from the start.
Common questions
What is the difference between a manufacturer and workmanship warranty?
The manufacturer covers defects in the product. The workmanship warranty covers how it was installed and comes from the roofer.
Do warranties transfer when I sell?
Some do, often with a fee or time limit. Read the terms.
Does a manufacturer warranty cover storm damage?
Generally no. Manufacturer warranties cover product defects, not damage from wind, hail, or falling debris. Storm damage is typically a homeowners insurance matter.
If my roofer goes out of business, does my workmanship warranty disappear?
It can, since a workmanship warranty is only as good as the company that issued it. This is one reason to choose an established roofer and keep all paperwork.
Are extended manufacturer warranties worth the certification requirement?
They can be, especially for longer-term homeowners, but they require using a certified installer and often a full matching product system, so weigh the cost against how long you plan to stay.
Do warranties cover labor to fix a defective material?
Sometimes only partially, and often only for a limited early period. Ask specifically whether labor is included or only the replacement material itself.
Can routine maintenance affect my warranty?
Some warranties expect reasonable maintenance and prompt repair of minor issues. Neglecting small problems can sometimes be used to deny a later claim.
Is a verbal promise about warranty coverage enough?
No. Always get warranty terms in writing from both the manufacturer's documentation and the roofer's contract.
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