An integration of sliding, casement and fixed window or two windows of the same type (like casement-casement) or different types (casement-slider or fixed-slider), combination windows can be made available in a variety of sizes and designs as per your need. The advantage is that all the windows are built into one attractive, strong, integrated frame. It not only serves the perfect utilitarian purpose of sound and thermal insulation, design flexibility but also creates an architectural feature in the home.