Slab Poured Over Exsisting Slab New Slab Eroded By Water Underneath Gap - Concrete, Stone & Masonry - DIY Chatroom Home Improvement Forum


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Old 08-26-2013, 02:22 PM   #1
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Slab poured over exsisting slab new slab eroded by water underneath gap


I will try to get a picture up tomorrow. I was digging around my foundation and discovered that when my addition was built they poured the new slab over the existing slab. There is a gab between the 2 slabs 1"+ tall by a few feet long and a few inches deep. This was covered by mud. The bottom of the new slab appears to have eroded by water.

What is the best way to repair this?

My slab is level on the inside, no cracks. So there are no structural issues.

I just want to prevent any critters from getting inside and cover up this ugly sight and prevent any future issues.

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Old 08-26-2013, 04:26 PM   #2
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Slab poured over exsisting slab new slab eroded by water underneath gap


Moved to Concrete forum.

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Old 08-27-2013, 03:12 PM   #3
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Slab poured over exsisting slab new slab eroded by water underneath gap


Here is the image. What is the best product to use to fill inside the gap? I live in a very wet & hot climate not a cold climate. Thanks

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Old 08-27-2013, 10:06 PM   #4
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Slab poured over exsisting slab new slab eroded by water underneath gap


drill holes inside & pump cementitious grout OR polyurethane into the voids,,, this work is NOT diy/h-o stuff,,, it IS for specialists ONLY
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