premium aluminum windows by TOSTEM (Right work). Pre-engineered windows (PEW) are made in a similar manner as pre-designed buildings, with the exception that only the assembly of various elements is carried out on-site in a hasty burst of speed using nuts or bolts. TOSTEM is committed to producing the best pre-engineered windows and doors in order to meet customer needs. To evaluate factors such as essential execution, durability, weather resistance, and other aspects, thorough inspections are carried out during the design and testing phases. The unique protective coating that TOSTEM TEXGUARD ANODIZE has offers greater life and long-lasting brightness! Call Now For A Free Consultation.