Understanding Your Roof Warranty: What's Covered and What's Not

Roof warranties include two main types: manufacturer warranties covering material defects (typically 25-50 years) and workmanship warranties covering installation errors (typically 5-25 years). To maintain coverage, keep all documentation, schedule regular inspections, ensure proper ventilation, and avoid unauthorized repairs or modifications.

Your roof warranty is one of your most valuable protections as a homeowner, butonly if you understand what it covers and how to keep it valid. After 45+ years of installing roofs in Central Ohio, we've seen too many homeowners surprised when their warranty doesn't cover what they expected. Here's everything you need to know.

Two Types of Roof Warranties

1. Manufacturer Warranty (Materials)

This warranty comes from the shingle manufacturer (Owens Corning, GAF, CertainTeed, etc.) and covers defects in the roofing materials themselves:

• Manufacturing defects in shingles
• Premature granule loss beyond normal weathering
• Cracking or splitting from material flaws
• Algae resistance (on algae-resistant shingles)

Typical coverage periods:

*"Lifetime" typically means 40-50 years in warranty terms, with prorated coverage after a certain period.

2. Workmanship Warranty (Installation)

This warranty comes from your roofing contractor and covers errors in installation:

• Improper shingle nailing
• Flashing installation errors
• Ventilation issues from installation
• Leaks caused by installation mistakes

Workmanship warranty length varies significantly by contractor, ranging from1-2 years with some companies to 25+ years with certified contractors. This is one of the most important factors when choosing a roofer.

Enhanced Warranties: What Certified Contractors Offer

Manufacturers offer enhanced warranty programs through certified contractors. For example, as an Owens Corning Preferred Contractor, we can offer:

• System warranties: Coverage for the entire roof system, not just shingles
• Extended workmanship coverage: Backed by the manufacturer, not just the contractor
• Non-prorated coverage: Full replacement value for longer periods
• Transferable coverage: Warranty transfers to new homeowners

These enhanced warranties typically require using a complete system of products from one manufacturer (shingles, underlayment, ventilation, etc.).

What Voids Your Roof Warranty

Many homeowners unknowingly void their warranty. Common warranty-killing mistakes:

Improper Ventilation

Inadequate attic ventilation is the #1 reason warranties are denied. Without proper airflow:

• Heat builds up, causing shingles to deteriorate prematurely
• Moisture accumulates, leading to mold and deck rot
• Ice dams form more easily in winter

Manufacturers require specific ventilation ratios. If your attic doesn't meet these requirements, your warranty may be void from day one.

Unauthorized Repairs or Modifications

• DIY repairs with non-matching materials
• Satellite dish or solar panel installation that penetrates the roof
• Adding skylights without proper flashing
• Pressure washing shingles (removes granules)

Lack of Maintenance

Most warranties require "reasonable maintenance":

• Keeping gutters clear
• Removing debris from roof valleys
• Trimming overhanging branches
• Addressing minor issues before they become major

Installation Over Existing Shingles

If your new roof was installed over old shingles (a "roof-over"), many manufacturer warranties are either void or significantly reduced. This is one reason we always recommend full tear-off.

How to Protect Your Warranty

1. Keep All Documentation

• Original contract and invoice
• Manufacturer warranty registration
• Contractor workmanship warranty
• Photos of completed installation
• Records of any repairs or inspections

2. Register Your Warranty

Many manufacturers require warranty registration within a certain period (often 30-60 days). Your contractor should handle this, but verify it was completed.

3. Schedule Regular Inspections

Professional inspections every 3-5 years (and after major storms) create documentation that you've maintained your roof properly. This evidence is valuable if you ever need to file a warranty claim.

4. Use Qualified Contractors for Any Work

Any repairs or modifications should be done by licensed professionals using compatible materials. Keep records of all work performed.

5. Address Problems Promptly

A small leak that you ignore for months can become "lack of maintenance" that voids your coverage. Address issues quickly and document your response.

Filing a Warranty Claim

If you believe you have a warranty issue:

1. Document the problem: Photos, dates, description
2. Gather your paperwork: Original warranty, registration, maintenance records
3. Contact your contractor first: For workmanship issues
4. Contact the manufacturer: For material defects
5. Get a professional inspection: To determine the cause

Be aware that warranties typically don't cover damage from storms, falling objects, or "acts of God". That'swhat your homeowner's insurance is for.

Warranty vs. Insurance: What's the Difference?

If your roof fails due to a defect, that's a warranty claim. If it's damaged by a storm, that's an insurance claim.

Questions to Ask Before Installation

When getting quotes for a new roof, ask these warranty questions:

• What manufacturer warranty comes with these shingles?
• What workmanship warranty do you provide?
• Is your warranty backed by the manufacturer or just your company?
• What would void the warranty?
• Is the warranty transferable if I sell my home?
• Will you register the warranty for me?

At DiYanni Roofing, we provide detailed warranty documentation and explain exactly what's covered. As an Owens Corning Preferred Contractor, we offer enhanced warranty options that provide superior protection for your investment. Contact us to learn more about our warranty coverage.