
Energy Efficient Windows
Good Window Design & The Importance of Double Glazing
Is Double Glazing Worth The Money?

Simone Schenkel of Gruen Eco Design
IS double glazing worth the money you invest? The answer is YES, but ONLY if it is installed correctly, without a cold bridge (thermal bridge). A window or a door is essentially a hole in the wall and responsible for most of the unwanted heat loss or gain.
Windows are essential for a house and the comfort and well-being of its inhabitants, as they let natural light and fresh air into the building and enable views. Appropriate window design, size, location and glazing treatment, combined with shading and internal covers, can significantly reduce the energy required for heating and cooling. Maximum solar access for north-facing windows can reduce winter heating bills up to 25%. External shading can block up to 80% of summer heat gain through windows. Double glazing and internal coverings can reduce heat loss in winter up to 40%.
Glass is the potential weak point of a building in terms of energy efficiency. A single glazed window can gain or lose up to ten times more heat than an insulated wall.