Heat gain and solar penetration can be controlled with different levels of glass transparency, tinting or glass selection, depending on the user’s applications. Alternatively, a user’s first priority might be to minimise glare. Requirements inevitably differ according to location, impacts on neighbouring properties, the presence (or absence) of shading devices, and other passive design elements. Minimal UV penetration might be another important factor, particularly in light-sensitive environments like shopfronts. The final configuration of an Insulated Glass Unit (IGU) results from careful scientific assessments of the above criteria, alongside additional factors such as the client’s desired energy efficiency targets.
Reflective, tinted or mirror finishes are available, as are more colour-neutral options to achieve similar performance outcomes.