Wallpaper is coming back into style. Modern designs feature bold, geometric patterns and sometimes even raised features. Applying wallpaper to a flat wall in your Cincinnati home is not overly challenging and is certainly a project you can tackle on your own without the help of a contractor or interior designer. However, you may be a bit perplexed when you reach the windows! Navigating around the corners and getting a clean edge requires some attention to detail, but it's not overly difficult if you follow these steps.