Understanding roofing warranties is essential for Minnesota homeowners investing in a new roof. A roofing warranty protects your investment — but not all warranties are created equal. The difference between a basic manufacturer warranty and a comprehensive system warranty can mean tens of thousands of dollars in coverage. At Weatherguard Construction, we''ve been helping homeowners across Stillwater, Woodbury, Minneapolis, St. Paul, and the Twin Cities understand and maximize their roofing warranty coverage for over 25 years. Here''s what you need to know.

Types of Roofing Warranties

There are two fundamental types of roofing warranties, and understanding the difference is critical:

Manufacturer''s Material Warranty

This warranty covers defects in the roofing materials themselves — shingles, underlayment, and accessories. Key points:

  • Provided by the shingle manufacturer (Owens Corning, GAF, CertainTeed, etc.)
  • Covers material defects like premature granule loss, cracking, or manufacturing flaws
  • Does NOT cover installation errors or workmanship problems
  • Duration varies from 25 years to "lifetime" depending on product
  • Often has prorated periods where coverage decreases over time
  • Typically transferable to a new owner, sometimes with reduced coverage

Workmanship Warranty

This warranty covers the quality of the installation — how the materials were applied. Key points:

  • Provided by your roofing contractor
  • Covers installation errors like improper nail placement, flashing mistakes, or ventilation problems
  • Duration varies dramatically — from 1 year (or nothing) to lifetime
  • Only as reliable as the contractor — if they go out of business, the warranty is worthless
  • May or may not transfer to new homeowners

The critical gap: most roof failures are caused by installation problems, not material defects. A manufacturer warranty alone leaves you exposed to the most common cause of roof failure.

The Owens Corning Warranty Advantage

As an Owens Corning Platinum Preferred Contractor, Weatherguard Construction offers warranty coverage that standard contractors simply cannot provide:

Standard Contractor (Non-Preferred)

When a non-certified contractor installs Owens Corning shingles, you receive:

  • Standard Limited Warranty on materials only
  • No manufacturer-backed workmanship coverage
  • Prorated coverage that decreases over time
  • Basic wind resistance warranty (standard rating)
  • Workmanship coverage depends entirely on the contractor''s own warranty (if they offer one)

Platinum Preferred Contractor (Weatherguard Construction)

When Weatherguard Construction installs your Owens Corning roof, you receive:

  • Platinum Protection Limited Warranty — the highest available
  • Manufacturer-backed workmanship coverage — Owens Corning stands behind the installation
  • 25-year TRU PROtection Non-Prorated Period — full replacement value for 25 years
  • 130 MPH wind resistance warranty on Duration shingles
  • Algae resistance warranty for 15 years
  • Lifetime shingle coverage for as long as you own your home

The Platinum Protection warranty is only available through Platinum Preferred Contractors — the top tier of Owens Corning''s contractor network. Only a small percentage of roofing contractors nationwide earn this designation, which requires meeting stringent standards for training, quality, customer satisfaction, and business practices.

What Voids a Roofing Warranty?

Warranties don''t cover everything, and certain actions can void your coverage:

Common Warranty Exclusions

  • Improper ventilation — If inadequate attic ventilation caused the failure, the warranty may not cover it. This is why Weatherguard Construction always addresses ventilation during installation.
  • Unauthorized modifications — Satellite dish installation, solar panel mounting, or other roof penetrations by unqualified installers can void warranty coverage
  • Pressure washing — High-pressure cleaning can dislodge granules and void the warranty
  • Foot traffic damage — Walking on the roof unnecessarily or improperly
  • Acts of God — Some events like hurricanes or tornadoes may be excluded (separate insurance coverage applies)
  • Failure to maintain — Neglecting obvious maintenance like clearing debris from valleys

How to Protect Your Warranty

  • Keep all documentation — warranty certificates, invoices, and installation records
  • Schedule regular inspections — annual professional inspections identify issues before they escalate
  • Address repairs promptly — letting small problems grow can void coverage
  • Use qualified professionals — for any roof work, antenna installation, or solar panel mounting
  • Don''t pressure wash — use gentle cleaning methods approved by the manufacturer
  • Maintain proper ventilation — don''t block vents or modify the ventilation system

Warranty Transferability

If you sell your home, can the new owner benefit from your roofing warranty?

Owens Corning Warranty Transfer

Owens Corning allows warranty transfer to new homeowners, though terms vary:

  • Standard warranties transfer with reduced coverage
  • Platinum Protection warranties transfer with specific terms outlined in the warranty documentation
  • Transfer must be requested within a specified timeframe of the home sale
  • Registration is required — ensure your warranty is properly registered at time of installation

Having a transferable warranty from a recognized manufacturer adds real value when selling your home. Buyers in Eagan, Bloomington, and throughout the Twin Cities appreciate knowing the roof is backed by a comprehensive warranty.

Red Flags in Roofing Warranty Offers

Watch for these warning signs when evaluating contractor warranty promises:

  • "Lifetime warranty" without specifics — What exactly is covered? For how long at full value?
  • Verbal-only warranty promises — If it''s not in writing, it doesn''t exist
  • Very short workmanship warranties (1–2 years) — Suggests the contractor lacks confidence in their work
  • No manufacturer backing — The contractor''s warranty is only as good as their business longevity
  • Excessive exclusions — Some warranties have so many exclusions they''re effectively worthless
  • New or unestablished contractors — A warranty from a company that may not exist in 5 years offers no protection

Why Contractor Selection Matters for Warranty Protection

Your warranty protection is directly tied to your contractor choice:

  • Established contractors like Weatherguard Construction (25+ years, family-owned) provide reliable long-term warranty support
  • Certified contractors (Owens Corning Platinum Preferred) unlock the highest manufacturer warranty tiers
  • Storm chasers offering "free" roof inspections may install the roof and disappear — taking your warranty with them
  • Licensed contractors (MN LIC #BC282484) meet state requirements that provide additional consumer protection

Maximize Your Roofing Warranty

To get the best warranty protection for your Minnesota roof:

  1. Choose an Owens Corning Platinum Preferred Contractor like Weatherguard Construction
  2. Install the complete Total Protection Roofing System — not just shingles
  3. Ensure proper ventilation is designed into the project
  4. Register your warranty promptly after installation
  5. Keep all documentation in a safe, accessible location
  6. Schedule annual inspections to maintain warranty compliance
  7. Address repairs quickly through qualified professionals

Contact Weatherguard Construction at (651) 439-4320 or book a free consultation to learn more about our warranty coverage and roofing services. We serve homeowners across Stillwater, Woodbury, Minneapolis, St. Paul, and the entire Twin Cities metro, plus communities in Schaumburg, IL and Centennial, CO. MN LIC #BC282484.

Frequently Asked Questions

What does a "lifetime" roofing warranty really mean?

A "lifetime" warranty typically means the warranty lasts as long as the original homeowner owns the property. It does not mean the shingles are guaranteed to last forever. Coverage often includes a non-prorated period (full replacement value) followed by a prorated period (decreasing coverage). With Owens Corning''s Platinum Protection warranty through Weatherguard Construction, the non-prorated period is an industry-leading 25 years.

Is a manufacturer warranty enough, or do I need a workmanship warranty too?

You absolutely need both. Most roof failures result from installation errors, not material defects. A manufacturer warranty alone won''t cover problems caused by improper nail placement, flashing mistakes, or ventilation issues. The Owens Corning Platinum Protection warranty through certified contractors covers both materials AND workmanship.

How do I file a roofing warranty claim?

Contact Weatherguard Construction first — we''ll assess the issue and determine if it falls under warranty coverage. For manufacturer claims, we handle the documentation and submission process with Owens Corning. For workmanship issues, we address them directly as part of our commitment to quality.

Can I transfer my Owens Corning warranty when I sell my home?

Yes, Owens Corning warranties are transferable to new homeowners. The transfer process requires documentation and must be completed within a specified timeframe. Having a transferable manufacturer warranty adds tangible value to your home sale and provides peace of mind to buyers.