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Concrete Crack Control Whatsit

Nexussian

Well-known member
Joined
Mar 12, 2014
Messages
639
Location
Alaska
I remember seeing a product to insert into a concrete floor instead of saw cuts, if I recall correctly it was for use under flooring (tile, hardwood, etc. ).

I remember seeing them on here a few years ago, but I can't remember what they were called.

They look kind of like an upside down T with the shank of the T serving as the control break, but as it's an insert instead of a cut, you don't have to fill it later.

They were installed while the floor was still pliable (not fully set) so the shank of the upside down T was flush, or just below the surface.

I've searched here and online, but I'm not coming up with anything useful (any combination of "insert" and "concrete" I've tried returns either cast in anchors, or something unrelated :headscrat ).

Thanks in advance. :)
 
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lonestarky

Well-known member
Joined
Mar 28, 2011
Messages
367
Location
Lindenhurst IL
I remember seeing a product to insert into a concrete floor instead of saw cuts, if I recall correctly it was for use under flooring (tile, hardwood, etc. ).

I remember seeing them on here a few years ago, but I can't remember what they were called.

They look kind of like an upside down T with the shank of the T serving as the control break, but as it's an insert instead of a cut, you don't have to fill it later.

They were installed while the floor was still pliable (not fully set) so the shank of the upside down T was flush, or just below the surface.

I've searched here and online, but I'm not coming up with anything useful (any combination of "insert" and "concrete" I've tried returns either cast in anchors, or something unrelated :headscrat ).

Thanks in advance. :)
You thinking of a zip strip?

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red61cj5

Well-known member
Joined
Mar 31, 2016
Messages
3,751
Location
West Virginia
Mine has something called Screed Key. Kind of a C shaped strip that acts as control joint and also screed guide during the pour. All but invisible when done. Allows the two slabs to sort of interlock while being separate.
 
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