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Risk & Warranty·3 min read·Facility Diagnostics

Your 20-Year Roof Warranty May Already Require What You're Not Doing

Manufacturer No Dollar Limit warranties often carry documented maintenance requirements most facility managers have never read closely — and a hidden wet-insulation pocket can void far more than the warranty.

Most facility managers we talk to inspect reactively: a roofer gets called after water is already dripping onto inventory. By that point, the conversation has shifted from routine maintenance to emergency repair — and emergency repairs come with emergency markups.

The Warranty Clause Most People Skip

Many manufacturer No Dollar Limit (NDL) warranties — the strongest tier of roof warranty coverage, often running 20 years — include a documented periodic maintenance requirement as a condition of coverage. If that documentation doesn't exist when a claim is filed, the manufacturer has grounds to deny it, warranty term or not.

A single radiometric thermal survey, repeated on a routine schedule, is exactly the kind of documentation this requirement is asking for: a dated, third-party record showing the roof was inspected and its condition tracked over time.

What a Hidden Moisture Pocket Actually Costs

Trapped moisture in the insulation sub-layer doesn't announce itself. It can sit undetected for months, degrading the insulation and the membrane above it, before it finally breaks through to the interior ceiling — at which point the fix is no longer a patch, it's a section replacement, and sometimes a full reroof.

A single 100-square-foot wet insulation pocket, caught early, is typically a targeted cut-and-patch repair. Caught late, after it's spread and compromised the surrounding membrane, it can put a multi-million-dollar roof asset at risk of premature full replacement — years or decades before its rated lifespan.

The Proactive Alternative

A post-sunset radiometric Delta-T scan takes about an hour and pinpoints exactly which sections of insulation are wet, so a contractor can cut out and replace only the affected area — preserving the rest of the membrane and avoiding a replacement that was never actually necessary.

See How This Applies to Your Facility.

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