Expert: Dan Griffin - 1/3/2008

Question
QUESTION: I just wrote you and upon re-reading, I think it may not be clear that I only planned to pour concrete to level under the new block I wish to add. I was not planning to level the whole area under the deck that I am enclosing. It is okay if it slopes. I plan to hose it out occasionly, as it will be a work space with a wetbelt sander, and wet cutting table. So the slanted floor is fine and I plan to add a drain to the outside with a cap so small critters don't come in, but I can uncap it and wash out my kiln and cold working room. Thanx.
KaCe

ANSWER: I think I have answered.  Let me know how you do.

---------- FOLLOW-UP ----------

QUESTION: I see that the original question did not go through. My question was: if I want
to level a concrete slab under new blocks for the construction of a wall, how
do I pour the concrete to make a level surface to lay the new blocks on?

I have a slab that is under a deck. I plan to enclose under the deck for a kiln.
It will be water tight, but not air tight. There is some leakage of air where the
wall will meet the joists for the deck because of the drainage system, this is
ok. What I wrote asking about was a good way to attach the new block to the
slab. I want to pour a thin layer of concrete to level the slab, which slopes
now for drainage. I don't know how thin I can pour. I want the leveling
concrete to be as small as possible.

I had planned to drill into the concrete and place either rebar or a threaded
pipe. Then pour concrete to level. Then add block on top of the concrete and
place over the pipe/rebar. Then add the 2 x 6 sill on top of two courses of
block and screw it down to sandwich the blocks. Does this sound like a good
plan? Do you have suggested materials for the ties? If I pour concrete
between some 2 x 6's how would I keep it from seeping under it? Using a stiff
mix? Using a coating of latex? Is there already something created that will
achieve this? I can send sketches if that helps. TIA

Answer
kaCe,
Your original question went through just fine.
I answered your original question to the best of my ability.
I understood quite well what you meant by thin concrete under the block only.
I explained why it would probably not work.
I offered several alternatives to your plan, so when I got to your second post about clarifying your position, I responded "already answered".

I can still see your first question and my first answer which really surprises me about this third question.