I put a brick veneer over my front porch concrete in a herringbone pattern. Now it matches the brick on my home and it's not slippery when wet. Easy project. Clean cement well and mortar 1/2 bricks directly then fill in joints with mortar. About $200. My porch is large..update 6 years later no problems and looks great!
Since the building that houses this apartment dates back to 1919, Mariani reused the existing pavement by turning it on an angle and staining it to resemble the patina of the limestone facade. Grass panels were also added. The panels are actually faux turf; it isn't always practical to install a real lawn that needs mowing and maintenance on a rooftop.