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Old 10-21-2013, 06:41 PM   #1
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Updated Plumbing Under Concrete Slab Floor


We just purchased an old house that was built in 1948. The plumbing in the bathroom was completely wasted and way out of date. So I had to use a concrete saw and cut out the floor to remove the old and update the plumbing to new. After the plumbing was fixed I filled in the floor with fine sand like a contractor told me. Then I put about 2 inches of 5/8 pea gravel over the sand then layed out 1" thick pink sheet insulation on the pea gravel. I have most of the rebar work done and will be ready to have the concrete poured in a few days. I looking for some advice on tools I'll need to have on hand when the redi-mix arrives to be poured. And any advice on how I should finish the floor to prepare it for tile.
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Old 10-25-2013, 05:25 AM   #2
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Updated Plumbing Under Concrete Slab Floor


what's w/all the wire mesh bagg'd conc mix - less'n $100,,, we're replacing a conc d/w threshold ( 4' x 13' ) & not using redi-mix - only 30b,,, depending on what's covering the floor, 2 x 4 screed & rectangular trowel

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Old 10-25-2013, 10:22 AM   #3
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Updated Plumbing Under Concrete Slab Floor


Did you put a vapor barrier down? You also may need to use a dehumidifier for a while after you pour the concrete.
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Old 10-25-2013, 10:58 AM   #4
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Nice job getting old concrete out. I agree the wire is over kill.
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Old 10-25-2013, 12:10 PM   #5
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Updated Plumbing Under Concrete Slab Floor


Well the concrete was poured yesterday. All went well. It was hard this morning when I went to work. I used a few different sized screeds to level it out then used a 16" Magnesium float as well as a 16" flat trowel to finish off the edges. It took alot of work to get it it half way flat. Even if it doesn't look completely flat I can always make up the difference When I lay the tile on the floor. The next step is to build the interior walls and get the plumbing and electricity run so we can start using the bathroom.

I was told by a contractor that I should use the rebar it helps strengthen the foundation. I live about a mile from Lake Michigan and everything is beach sand in my area. So I was told to use the rebar just incase of any shifting of the sand. I did use the insulation to help insulate and keep the water off the bottom of the new concrete. The mix I ordered was reinforced with fibers and is supposed to have a curing agent to help it cure and dry out more evenly. I have poured a few doorway pads but nothing this big and awkward. The reason I bought the mix was my time is limited working 9-10 hour days 6-7 days a week. I don't have a whole day to spend mixing bags of cement. I'm too old for that heavy work, I'll leave that for the young guys.
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