TPO vs SPF: Which Roof Is Better for Your School?

School districts frequently evaluate TPO and spray foam as roofing options. Here's an honest comparison across the factors that matter most for educational facilities.

Cost

TPO installation: $5–$9/sq ft. SPF restoration over existing roofing: $4–$8/sq ft. For new construction or full replacement, costs are comparable. For restoration of existing roofs, foam is often less expensive. Over a 40-year school ownership horizon, foam's renewable warranty ($1–$2/sq ft recoat cycles) vs. TPO's replacement cycles ($7–$12/sq ft) creates enormous lifecycle cost difference.

Timeline

Both systems can typically be completed within a summer break window for most school roof sizes. Foam restoration is generally faster (no tear-off) and has fewer weather dependencies than TPO installation. For schools with tight summer windows, foam's speed advantage is meaningful.

Insulation Value

TPO adds essentially no insulation. Foam adds R-6.5 per inch. For schools with aging, poorly insulated roofs, foam's insulation improvement translates to direct HVAC savings — important for school districts managing operating budgets.

Long-Term Commitment

TPO requires full replacement every 20–25 years. Foam requires recoating every 10–20 years at a fraction of the cost. A school district planning 40+ years of building ownership gets dramatically better value from foam's renewable warranty structure.

The Recommendation

For schools with aging BUR or single-ply roofs under 25% wet insulation: foam restoration is almost always the better choice. For new construction where foam overlay isn't applicable: get quotes for both and compare lifecycle costs, not just upfront cost.