For a 10x8ft floating deck, you would need 12 blocks, one block every four feet, and four bags of gravel, bringing the total price of your deck’s foundation to about 40. I understand that if you are building a temporary deck low or on the ground you wouldn't bother with the handi blocks. Concrete blocks can be purchased for 1.80 a piece at Home Depot while a 50-lb. Sorry, I probably didn't give enough detail. I thought that maybe the extra size and weight of the piers was the reason they worked so well with the existing deck and that the blocks, fitted with posts and bearers, might not be as stable. Bigfoot Systems pier footing forms - plastic, pre-engineered, concrete footing forms are used with sonotubes.

The handi blocks are the same dimensions at the base as the existing piers - 250mm x 250mm - but the brick piers are much taller - 500mm compared with 140mm. A local council building surveyor suggested footings with 400mm holes, but that would mean 30 bags of concrete and setting up stirrups - a big job, especially if it is unnecessary. The existing deck has been fine with brick piers, but the old brickie who did the piers is no longer around. In my case I am building a permanent extension - 4.2 metres wide and 2.4 metres long - to an existing attached deck. I understand that if you are building a temporary deck low or on the ground you wouldn't bother with the handi blocks. Mmm - what is it about the other posts above that doesn't answer your questions? Or for that matter your own evidence underlined.

Floating foundation deck system canada