#1 Home Improvements pro expert company suppliers installers in Swansea for customers looking for A-Rated Windows in Double or Triple Glazing. At A-Rated Veka and Fensa registered approved Home Improvements, the full range of windows are available in a variety of styles and configurations to match the current aesthetic of your home. Casement windows are a traditional window style that can be utilised for many uses including the ability to be incorporated into bay and bow windows.