Pre-engineered windows (PEW) are made in a similar manner as pre-designed buildings, with the exception that only the assembly of various components is done rapidly on-site using nuts or bolts. TOSTEM is dedicated to creating the highest quality pre-engineered windows and doors in order to exceed client expectations. TOSTEM provides comprehensive, sturdy, and long-lasting premium aluminium windows for your home and office. TOSTEM is the one-stop housing solution for all of your window needs due to its outstanding characteristics. Totem is the world's leading maker of premium aluminium windows with Japanese ingenuity. We provide you with the highest quality aluminium windows with a 40-year warranty that can endure severe rain. Using a Range of Colours, Sizes, and Designs