I've got 4" posts to cut for deck support off the ground all ready and some
postcrete. 12" square x 15" deep holes have also been dug with a concrete
slab in the bottom of each.
Do I set the concrete at/above ground level sloping away from posts or do I
set it below the ground and infill with soil after concrete has set (and to
How high off the ground do I position the deck base frame (closer the better
for my purposes)?
There seems to be lots of conflicting information about on the net so
figured you guys would know!
Heres a few pics of mine i did 2 years ago, i didnt even conrete the posts,
just sledghammered some 3 by 3 short lengths about 16" long into the ground
as far as they would go (chopped em off then) then coachbolted the base
rails to them, its faultless, solid as a rock to walk on. Also put 3 or 4 of
these on the cross rails every 2 feet or so so the middle of the deck
wouldnt flex. let me know if you need any further help avice ill do what i
After 2 years:
Our support posts have the concrete raised about 50mm above ground level,
sloping away from the posts to ensure any water runs off and does not sit
next to the wood.
As to height off the ground, ours is anywhere from 2' to 5' - but then we do
live on the side of a hill!!
Don't forget to put some membrane under the deck to keep the weeds at bay -
something like Plantex will do the job.
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