Place the Decorative Border
With the back portion of the border set, set the decorative border (Image 1). Apply and notch the thinset with a small margin trowel, place the decorative border in the thinset and press down with the rubber float to ensure that the border is setting in the thinset. Because the decorative border used in this project had a paper backing, once the thinset for the decorative border has hardened, wet the paper backing and peel it back. In the waiting spaces, set small one inch glass squares using thinset (Image 2).