Nu-Line Windows is a renowned provider of bifold doors and sliding doors. Products are available in aluminum metal, which are either powder coated or anodised. Also, they are energy efficient, means they save energy by keeping the indoor temperature (be it hot or cold) stagnant for longer time, allowing you to save energy consumed by electric appliances used to regular indoor temperature. Secondly, they are weather-sealed, means they keep off bad weather. Nu-Line Windows is offering bolfolds in three different varieties – Hawkesbury door system, Rapid door system and EL 60. All the bifold doors are designed heavy duty service. Therefore, they can be used in both residential and commercial applications.