Understanding Commercial Roofing Warranties: What Really Matters
A 20-year warranty sounds impressive, but what does it actually cover? Commercial roofing warranties vary dramatically in scope, exclusions, and real-world value. Understanding the different types of warranties helps you make better decisions when selecting a roofing system and contractor.
Types of Commercial Roofing Warranties
Manufacturer Material Warranty
This covers defects in the roofing materials themselves. If the membrane fails due to manufacturing flaws, the manufacturer replaces the material. However, these warranties typically don't cover labor costs for removal and reinstallation, which can exceed the material cost.
Contractor Workmanship Warranty
This covers installation errors. If seams fail because they weren't welded properly, or leaks occur at improperly installed flashings, the contractor's warranty should cover repairs. Terms vary widely, from 2 to 10 years.
Full System Warranty (NDL)
The gold standard is a No Dollar Limit (NDL) warranty from the manufacturer that covers both materials and labor for a specified period. These require installation by certified contractors and often include mandatory inspections.
Common Warranty Exclusions
- Damage from foot traffic or dropped objects
- Acts of nature (hail, wind beyond rated levels, flooding)
- Ponding water in many basic warranties
- Damage from improper maintenance
- Problems with adjacent building components
- Consequential damages (interior damage from leaks)
Read the Fine Print
Always read warranty documents completely. Some warranties require specific maintenance schedules, annual inspections, or immediate reporting of any issues. Failing to meet these requirements can void coverage entirely.
What to Look For
When evaluating warranty offers, consider these factors:
- Is labor included, or only materials?
- What is the dollar limit, if any?
- Is coverage prorated over time?
- What maintenance is required to keep coverage valid?
- Is the warranty transferable if you sell the building?
- How financially stable is the warranting company?
The Value of Certified Installation
Manufacturer-certified contractors can offer enhanced warranties because they've demonstrated competency with the products. GAF Master Commercial contractors, for example, can offer warranties that non-certified installers cannot. The certification process ensures installers know proper techniques, reducing the likelihood you'll ever need to make a claim.
