Gentek offers comprehensive lines of vinyl, aluminum and steel siding, as well as composite and specialty siding, soffit, fascia, and trim. We also manufacture an extensive selection of windows and patio doors. CHECK OUT our ALIGN™ Composite Cladding! This innovative cladding delivers a remarkably realistic wood look, with easier installation and better overall value, giving the high-end aesthetics your customers want and the lower total installed cost you need.