Not Eligible for a Roof Coating System? – Here's What To Do

A roof coating system is the ideal solution for many commercial roofs — but not all qualify. Here's what to do when your roof doesn't meet the eligibility requirements.

Why Roofs Fail to Qualify

The most common disqualifying conditions are: wet insulation exceeding 25% of the roof area, membrane delamination or structural failure, deck rot or structural compromise, and building code restrictions on adding roof layers.

Option 1: Partial Restoration

If only certain sections of the roof are disqualified (e.g., a localized area with high moisture), it may be possible to perform a full tear-off and replacement in those sections while restoring the remainder with a coating system. This hybrid approach can be significantly less expensive than replacing the entire roof.

Option 2: Spray Foam After Wet Insulation Removal

Even roofs with significant wet insulation may qualify for spray foam restoration once the wet areas are removed and replaced. Foam can then be applied over the repaired substrate. This approach works when the underlying deck is sound.

Option 3: Full Replacement

When the roof truly cannot be restored — deck failure, excessive moisture, or code requirements — a full tear-off and replacement is necessary. In this case, the decision shifts to which replacement system offers the best long-term value: spray foam (for maximum insulation and renewability), TPO (for cost-effective new construction), or other options based on your specific building needs.

Get an Independent Assessment

If one contractor tells you replacement is the only option, get a second opinion from a contractor who offers both restoration and replacement. You want an honest assessment, not a recommendation driven by what system the contractor prefers to sell.