http://www.gharexpert.com/category/1405/Aluminium-Windows-0.aspx?CatID=1405Aluminium Windows information at GharExpert.com. There are various types of raw materials recommended for Aluminum Windows: Window Frames, Window Glasseshttp://www.gharexpert.com/articles/Aluminium-Windows-803/What-various-frames-recommended-Aluminum-Windows--0.aspx?PL=2&ArticleID=803&CatID=1405There are two types of frames recommended for Aluminum Windows:Aluminum Frame,Aluminum Clad Wood Framehttp://www.gharexpert.com/articles/Aluminium-Windows-802/What-various-types-protective-coatings-used-Aluminum-Windows--0.aspx?PL=2&ArticleID=802&CatID=1405Aluminum Windows can be oxidized due to exposure into the air. So Aluminum Windows are usually finished with anodized polyester powder or liquid organic coatings for protection against oxidation and for decorative coating which can be cleaned easily.http://www.gharexpert.com/articles/Aluminium-Windows-801/What-raw-materials-recommended-Aluminum-Windows--0.aspx?PL=2&ArticleID=801&CatID=1405 There are various types of raw materials recommended for Aluminum Windows: Window Frames, Window Glasses