Rene Turck & Associates (Pty) Ltd was established in 1988 as a family owned glass manufacturing concern, growing over the years into one of the most technologically advanced glass processors in South Africa, with the purpose of protecting and providing commercial and domestic solutions to South Africa.

South Africa is under crises from a shortage of energy – particularly electricity. To this end SANS 204 and SANS 10400-XA were promulgated in order to ensure compliance pertaining to energy efficiency purely because the type of glass one chooses in windows and doors will impact on how a building functions.

The calculations include an insulation value (U value) Solar Heat Gain Coefficient, Air Leakage, and a high light transmission in order to enhance the comfort of a dwelling using different glass types in various areas. Large areas of glass – particularly facing North and West, will typically require enhanced performance. Under standard conditions the insulation value of double glazing with Low E is reduced by approximately 67% in winter and 64% in summer when compared to ordinary glass.