Tile Over Control Joints in Basement Slab
Tile Over Control Joints in Basement Slab
(OP)
I have been reading a lot on the ole' internet about crack isolation membranes for tiling over "cracks" in concrete slabs to isolate "in-plane" movement to keep cracks from propagating up through the tile.
Is it necessary to honor a Control Joint that was cut in the slab strictly to control cracking?
The cuts in my basement slab have not moved since they were cut 5 yrs ago. Since it is below grade, I have a hard time believing that they ever really will. The slab confined on all sides by CMU walls. The only movement I would anticipate would be from water pressure below and that would cause "out of plane" movement and that can't be helped with any membrane.
Thoughts?
Is it necessary to honor a Control Joint that was cut in the slab strictly to control cracking?
The cuts in my basement slab have not moved since they were cut 5 yrs ago. Since it is below grade, I have a hard time believing that they ever really will. The slab confined on all sides by CMU walls. The only movement I would anticipate would be from water pressure below and that would cause "out of plane" movement and that can't be helped with any membrane.
Thoughts?






RE: Tile Over Control Joints in Basement Slab
RE: Tile Over Control Joints in Basement Slab
RE: Tile Over Control Joints in Basement Slab
RE: Tile Over Control Joints in Basement Slab
http://www.tcnatile.com/faqs/24-crack-isolation-me...
RE: Tile Over Control Joints in Basement Slab
As far as I see it, these control cuts have long fulfilled there purpose and since the slab is some 7 ft below grade, and at a nearly constant temp I cant see thermal being an issue.
The 'crete has been curing for 5+ yrs...can't be shrinking too much anymore.
As I said above, water could be an issue if somehow it cause the slab to lift, but at that point no "Crack isolation" is going to help anyway.
RE: Tile Over Control Joints in Basement Slab