Key Takeaways
Option A
Manufacturer Warranty
The material-side protection backed by the shingle or product maker.
Best for: Homeowners who want coverage against defective roofing materials that fail prematurely under normal conditions.
Option B
Workmanship Warranty
The contractor-side guarantee covering how the roof was installed.
Best for: Homeowners who want assurance that installation errors — leaks from improper flashing, for example — will be corrected at no extra cost.
If you want protection against shingles cracking, curling, or granule loss within the warranty period
Manufacturer Warranty
Defective material failures are the manufacturer's responsibility. A robust manufacturer warranty with transferable terms adds long-term value to your home.
If you want assurance that your contractor will fix leaks caused by poor installation
Workmanship Warranty
Installation errors are the most common source of early roof failure. A multi-year workmanship warranty ensures the contractor is accountable for their own work.
If you plan to sell your home within the next several years
Manufacturer Warranty
Many manufacturer warranties are transferable to a new owner, which can be a meaningful selling point and may support your home's appraised value.
If you are hiring a contractor and want the strongest overall protection
Workmanship Warranty
Prioritise contractors who offer at least a 5-year workmanship warranty in writing. This signals confidence in their installation quality and provides meaningful recourse.
Why Two Warranties Exist — and Why Both Matter
When a roofing job is complete, you may receive a packet of paperwork that includes two different warranty documents. Many homeowners assume it is all the same coverage, but the two serve entirely different purposes and come from entirely different parties.
A manufacturer warranty is issued by the company that made your roofing materials — most commonly asphalt shingles, but also metal panels, synthetic slate, and other products. It promises that the material itself is free from manufacturing defects. A workmanship warranty (sometimes called a contractor warranty or installation warranty) is issued by the roofing contractor. It covers the quality of how the materials were applied to your home.
Think of it this way: if a shingle cracks because of a flaw in how it was manufactured, the manufacturer warranty should respond. If a shingle lifts and lets water in because it was not nailed correctly, that is an installation error — and the workmanship warranty is what protects you. Neither warranty covers the other's responsibility, which is why both are necessary. To understand how materials factor into coverage, see our guide on common roofing materials.
| Criterion | Manufacturer Warranty | Workmanship Warranty |
|---|---|---|
| Issued by | Roofing material manufacturer | Installing contractor |
| What it covers | Defective materials | Installation errors |
| Typical duration | 20 years to lifetime | 1 to 10 years |
| Transferable to new owner? | Often yes, sometimes for a fee | Rarely |
| Common void conditions | Mixed components, poor ventilation, improper install | Homeowner modifications, storm damage |
| Registration required? | Frequently, within a deadline | Usually no |
| Who handles claims? | Manufacturer's claims process | Contractor directly |
What Each Warranty Covers — and What It Does Not
Manufacturer warranties typically cover premature material failure due to defects in the product — things like shingles that crack, blister, or lose granules far ahead of their rated lifespan. Some manufacturers offer enhanced or extended coverage when their full line of accessory products (underlayment, starter strips, ridge caps) is used together as a system. Coverage periods can range from 20 years on entry-level products to a stated lifetime on premium ones, though the definition of "lifetime" varies by brand and is usually tied to the original owner.
What manufacturer warranties generally do not cover: storm or hail damage, improper installation, inadequate attic ventilation, walking on the roof, or mixing components from different manufacturers. Voiding conditions are usually printed in fine print — ask your contractor to walk you through them before the job begins.
Workmanship warranties cover errors made during installation — improper flashing around chimneys or skylights, incorrectly sealed valleys, inadequate fastening, and similar defects that lead to leaks or early failure. Contractor warranty terms vary significantly. Some contractors offer one year; others offer five or ten. A few manufacturers offer a combined warranty that folds workmanship coverage in, but only when a certified contractor installs their full system.
Workmanship warranties typically do not cover storm damage, normal wear and tear, or damage caused by the homeowner. If a project uses subcontractors, the warranty accountability can become murky — a topic covered in more depth in what homeowners should know about subcontractors.
How to Protect Your Warranty Coverage
Warranties are only useful if they hold up when you need them. Several straightforward practices help ensure that happens.
- Get everything in writing. Both warranties — manufacturer and workmanship — should be documented before the contractor leaves your property. Verbal assurances carry no legal weight. For broader guidance on what your paperwork should include, see roofing contracts explained.
- Understand the registration requirement. Many manufacturer warranties must be registered within a set window after installation — sometimes 30 days — or they default to a shorter coverage period. Ask your contractor whether registration is required and who is responsible for completing it.
- Keep records of any repairs or maintenance. Some warranties require periodic inspections or documentation that the roof has been properly maintained. Keep a simple file with photos, dates of work, and receipts.
- Verify your contractor's credentials. Manufacturers sometimes require that installers hold a certified or preferred status for the full warranty to apply. Confirm this before signing a contract. Our article on what bonded, insured, and licensed actually mean can help you evaluate contractor credentials more broadly.
- Do not alter the roof without checking warranty terms. Adding a skylight or satellite dish after installation may affect coverage. Always check before making changes.
This article is for informational purposes only. Warranty terms vary by manufacturer and contractor. Always review your specific warranty documents and consult a qualified roofing professional or legal advisor if you have questions about your coverage.