9 Out-of-the-Box Considerations Before Selecting a Commercial Roofing System

Most building owners focus on cost and material type when choosing a commercial roofing system. But there are 9 often-overlooked considerations that can significantly affect which system is the right choice.

1. Building Code Requirements

A full tear-off may trigger new construction codes requiring minimum R-values. Know before you commit whether restoration or replacement changes your code obligations.

2. Number of Existing Roof Layers

Most jurisdictions limit roofs to two layers. If you're at the limit, your next project requires a full tear-off regardless of roof condition.

3. Roof Drain Capacity

Adding foam or insulation changes the roof's slope and drainage patterns. Confirm existing drains can handle water flow before restoration.

4. Penetration Count

Roofs with many HVAC units, pipes, and skylight penetrations are better suited to fluid-applied systems like spray foam than seamed membranes.

5. Operational Sensitivity

If your operation cannot tolerate exposure to weather during installation, a restoration system that doesn't require tear-off is significantly lower risk.

6. Ownership Timeline

Planning to sell in 5 years? A 10-year warranty restoration may be sufficient. Planning 30-year ownership? A renewable system makes more sense than periodic replacements.

7. Insulation Goals

If your building has poor thermal performance, this is an opportunity to add R-value. Not all roofing systems offer meaningful insulation improvement.

8. Overspray Risk

Adjacent properties, vehicles, or sensitive equipment near the building should factor into whether spray-applied systems are feasible.

9. Contractor's Warranty Support

Some contractors issue warranties they can't back up if they go out of business. Manufacturer-backed warranties provide protection independent of the installing contractor.