Energy Savings and Spray Polyurethane Foam Roofs

Spray foam roofing delivers energy savings through two mechanisms: insulation (R-value) and solar reflectance. Here's how each works and what to expect.

Insulation Savings

At R-6.5 per inch, spray foam provides the highest roof insulation value available. For buildings transitioning from minimal or zero roof insulation to 2–4 inches of foam, HVAC cost reductions can be substantial — potentially 15–30% of heating and cooling costs in extreme climates. The exact savings depend on existing insulation level, climate zone, building HVAC system efficiency, and foam thickness applied.

Solar Reflectance Savings

The white silicone topcoat achieves 85%+ solar reflectance. In warm climates or for buildings with significant sun exposure, this can reduce cooling load by an additional 10–20%. A roof surface that stays 80°F cooler on a hot day transfers dramatically less heat to the building interior.

Combined Effect

For buildings with poor existing insulation in hot or cold climates, the combination of foam insulation plus reflective topcoat can transform roof-related energy performance. Case studies consistently show meaningful HVAC cost reductions — particularly for schools, warehouses, and large commercial facilities that run climate control year-round.

Calculating Your Savings

The most accurate way to estimate savings is to calculate the delta between your current roof R-value and the proposed foam R-value, then apply that difference to your heating/cooling degree days and HVAC system efficiency. A qualified foam contractor can help with this calculation for your specific building.