These installation do not come cheap though, considering all the work that is required to manufacture these doors and windows, especially when compared to the more common door and window types like sliding doors and tilt windows. In computing for the total costs associated with such installations, you also need to consider the quality of the materials that will be used, as well as the different hydraulics and mechanisms that are necessary for them to function properly. However, there are many reasons why you would want to have one installed in your property, and most of these reasons and benefits are more than enough to justify the price associated with such a project. Besides, there are many reputable companies who are capable of manufacturing and installing these types of doors and windows at very affordable prices. If you have a family member, a friend or a neighbour who has had bi-fold doors and windows installed in the past, ask them for references, and then you can go online and compare the prices and quality of work. Remember that quality is of utmost importance here – for both aesthetic and safety reasons – so don’t skimp quality for price.