This outdoor room looks expensive. but that's just what the homeowner wants you to think. Inexpensive building materials such as gravel, cinder blocks, and wood form the backbone of the design. Tile backboard and salvaged plywood, stained a soft blue and attached to a custom frame, give the tiny yard privacy. Easy and Inexpensive Ideas for Outdoor Rooms | Better Please note: You are currently browsing img bring the outdoors inside garden room with ceramic tile that is 681x511px in size. This image is listed in garden room flooring ideas category. Easy and Inexpensive Ideas for Outdoor Rooms Better, 681x511 in 81.61 KB.