A Look at The Selection Criteria For Home Siding The beauty of homes​ depends mostly on the type of siding. Besides providing a common theme to the building exterior and accentuating the design and character of your home, siding plays a vital role in protecting the home exterior from the elements of weather and even provides security. It is essential to understand the primary function of siding before you take up the project for replacing the existing siding or install a new one. Replacing or repairing siding is expensive, which makes it imperative to choose a durable siding that lasts long and recovers the investment besides saving cost by way of low maintenance.