It is common for double doors to have large glass panes, which can allow in both abundant natural light as well as giving too much visibility into your home. There are various ways to protect your privacy, but one method is to install double waterfall glass so that strangers cannot see inside your home. There are also opaque stickers you can install on the inside, which will make the glass foggy. These are just a few details to consider, as well as ensuring you have a sufficient locking system, including an interior lock, if possible.