Modern Flush Garage Doors From CHI Stone Mountain GA. Our client wanted something different and we found it! Our client inquired about a modern black garage door. We found the solution they were looking for. The primary garage door is a black plank door with modern frosted windows. Our client is thrilled with the results. The 18×7 black CHI 2358 was installed with a Genie 6070 side mount garage door opener. The 10×7 black flush panel garage door is a CHI 2328 with manual operation.