When rating levels of reflectance, COLORSTEEL® uses two measurements: Total Solar Reflectance (TSR) and Light Reflectance Value (LRV). When looking at a colour sample, these two measurements will appear alongside the description, and they can be important to note.
TSR relates to the temperature an object will reach on a hot summer’s day, and measures the amount of solar energy reflected from that object. A high TSR rating will mean a structure does not absorb as much energy from the sun, which will in turn keep the building cooler in summer and could help to save on energy costs in the long run.
With this IR reflectance technology in place for your chosen roofing or cladding shade, provided the building is well insulated and solar gain is taken into account in the design, it should remain at a neutral temperature year-round. To learn more about the TSR and LRV values for specific COLORSTEEL® colours, check our colour range page which shows the percentages associated with each shade.