These teak deck tiles can be used to retrofit an old stone patio or to create a completely new deck. Measuring 19 1/2 inches by 19 1/2 inches, each tile is made from kiln-dried plantation-grown teak, which naturally resists water, warping, and cracking. The tile can be specified in a straight or diagonal configuration. Cost: $8 per square foot. East Teak Fine Hardwoods.