Sika Takes Solar Reflectivity to a New Level

The benefits of solar reflective materials and colours are well known and understood, especially in warm climates around the world. With urban density increasing, the heat island effect is also impacting on cities at an ever increasing rate. White highly reflective membranes dramatically increase reflectivity and reduce both the heat island effect and the cooling energy consumption requirements for buildings. Sika roofing systems include highly reflective, white, thermoplastic membranes with an initial reflectivity SRI = 111% (Solar Reflectance Index) and PU liquid applied membranes with a similar SRI = 110% – contributing to your Green Building Certification rating.

Global Warming Potential (GWP)

Break-even diagram showing the carbon costs of a roofing system: Global Warming Potential (GWP) [kg CO₂-eq./m²]

Case study of a project in Seville, Spain

The example above compares a roof build-up with the highly reflective Sika® Sarnafil® S 327-15 EL SR membrane (initial reflectivity SRI = 111%) to a black roofing membrane. After a period of less than two years, the CO₂ that was spent for raw materials, production, installation and end-of-life, is compensated by the CO₂ saved due to reduced cooling energy demands inside the building.