Triple Layer vs Double Layer Polycarbonate Rooflight

When selecting your new polycarbonate rooflight, the main deciding factor should be how energy efficient you need or want it to be. In this process it is important to ascertain the rooflight’s U-value. U-values measure how effective a rooflight is as an insulator. The lower the U-value the more thermally efficient your polycarbonate rooflights will be.