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Unread 01-24-2023, 08:59 PM   #1
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Raising Sunken Floor

I have a small walk-in closet that is 5' x 8' and is currently tile over concrete slab. The floor is about 2 3/8" lower than the bedroom floor (terrazzo). I plan to fill the sunken closet with concrete - then re-floor either with tile or a laminate. Bedroom will stay terrazzo for the foreseeable future.

What is the general consensus on the existing tile - it has been solidly adhered for 25-30 years. Can I pour over it or should it be removed? I can chip it out if needed, but wasn't sure if it would be needed in such a small space that is not a heavily trafficked area.
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Unread 01-24-2023, 09:35 PM   #2
Tool Guy - Kg
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Have you checked to see how well it’s bonded? Invert a large screwdriver and tap the tops of the tiles all over the floor. You’ll know pretty quickly if you’ve got unexpected loose tiles.

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Unread 01-25-2023, 06:52 AM   #3
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All the tiles are solidly adhered. If they were loose or hollow I would definitely pull them all out. Just trying to decide if they should be removed. If it was a living room or large space - I would be inclined to remove them. Not so sure on such a small low traffic space.
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Unread 01-25-2023, 03:18 PM   #4
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Hi K,

You can bond deck mud to the tile. Install some sort of soft joint/expansion joint where the new floor meets the terazzo. We have instructions for making deck mud from bags of sand topping mix: https://www.johnbridge.com/how-to/deck-mud/
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