12-inch x 12-inch x 4-inch Instant Foundation Blocks

TuffBlock is designed for installing and anchoring posts. This product provides easy installation due to no holes being dug or concrete to pour. TuffBlock is the lightest and most versatile deck foundation system on the market. An individual TuffBlock has been designed to support over 1,700 lbs and has successfully been tested to support over 11,000 lbs Accepts 4 in. x 4 in. posts & 2 in. joists Unique to the TuffBlock is the ability for low level decking; it is now possible to build a deck as low as 6½ without the need for digging 28 times lighter than concrete blocks at just 1.5 lbs each Designed with a ventilated underside to prevent moisture buildup and deter termites, TuffBlocks are the only block product that are able to be secured to the post/bearer for extra stability TuffBlock's are made of high strength closed loop 100% recycled polyolefine material with an ultra high UV rating