Replacing, adding, or modifying windows is a part of most high-ceiling room additions. In many cases, this work is required by the building code. In other situations, new windows and doors are purely optional. Either way, exterior windows and doors enhance the space with natural light and fresh air. Windows and doors are available in a wide variety of styles and operations. Examples include sliding, single-hung, double-hung, French, casement, fixed, etc. Our preferred window supplier is Milgard®, but we have access to virtually every brand and product line.