My front deck is sagging noticeably in the middle. The deck itself is
approx. 4' x 16', and is used only as an entrance/exit (no BBQ,
furniture, etc.). The deck surface is about 1.5' (avg) above ground
There are support 4x4's running vertically at each end of the deck,
and one support in the middle. The supports extend just over 8' to a
roof overhang above. It is clearly noticeable that the middle
'support' post is not even touching the underside of the overhang
anymore....based on this, it looks like the middle portion of the deck
has sagged about 1".
Also, at ground level, it looks like the post simply terminates at the
ground, with no concrete or blocking of any kind. I presume the best
solution is to jack up the deck in the middle, place a pre-formed
concrete block/slab (or even PT wood) beneath the 4x4, and simply
remove the jack.
However, any suggestions on what type of jack to use, or any
alternative method would be greatly appreciated. I should mention
that because it is a front deck, the 4x4 support posts are shrouded
with 1x4 running horizontally (to hide the underside of the deck).
This could make access difficult; I expect that I would have to remove
one or more of these planks first.