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Tomfh - they are not deep. Most probably within putty, paint and sealant that used to fill up the joints.

Another photo https://files.engineering.com/getfile.aspx?folder=43dd29dd-2dac-4b0b-b623-cc4ba0c379db&file=IMG_3169.jpeg

I’m noticing cracks at some parts of my villa that I have bought one year ago. The villa is wholly built from precast concrete. Most of the cracks are at the corners between hollow core slabs and non bearing walls. And some of them at the walls corners. I’m thinking to repair the cracks by...

Will do. Thank you

Thank you hokie. Is it same as Sikaflex Precast?

This is the horizontal joint between wallshttps://files.engineering.com/getfile.aspx?folder=c13bc3b6-2bb2-4d9f-9ab9-4d8992b2540d&file=IMG_3037.jpeg

Another photo for slab crackhttps://files.engineering.com/getfile.aspx?folder=d6ec883d-f1f5-4d14-a64b-a8dd2f442509&file=IMG_3035.jpeg

I’m new here and couldn’t upload more than photo in the post. Attached is the hollow core slab crack. https://files.engineering.com/getfile.aspx?folder=b3cfa787-676b-4be9-86b4-496b01921aa8&file=IMG_3034.jpeg

One year ago I bought a 2-story house that is built from precast concrete elements (walls and hollow core slabs) with a raft foundation on compacted soil. I noticed the following; 1- After six months I found (2-3mm) width cracks on the first floor hollow core slab that can be seen from ground...