Is this anything to be concerned about?

PoGee

Is this anything to be concerned about - it's the horizontal crack I'm referring to.

MultiFuelBurner

Is that a garage?

Any signs of the crack the other side of the wall or up the wall. Maybe just broken flooring tiles maybe they are brittle? Have a feel

Jonboy_1984

Those look to be vinyl type floor tiles (my place of work had them on stairs to provide grip).

What is under them is it a ground floor, landing , upstairs floor etc?

PoGee

It's a landing. Block of 6 flats, 2 on ground floor, 2 on first and 2 on 2nd floor.

Jonboy_1984

Can you push a cocktail stick or similar (ruler if it would fit) in at various points to determine the depth of the crack?

If over the 3-5mm depth of the top tiles I would be onto the freeholder/management agent to get it assessed quickly as a potential structural issue. 

If very shallow I would report it to them as faulty flooring and let them determine the course of action.

PoGee

Thank you for replies. The cracks are on each landing bar the lowest one. The flats are on mid landings so go up some stairs, there's a flat, go up some more and then it's the next flat and so on. I followed one of the cracks and took a picture. It's not on the underside of the landing yet but, as you can see, it soon might be. I think this looks structural?? It's the same picture with all the landing cracks, in that each follows onto the side of the landing. I think the landings are concrete.

Section62

PoGee said:

Thank you for replies. The cracks are on each landing bar the lowest one. The flats are on mid landings so go up some stairs, there's a flat, go up some more and then it's the next flat and so on. I followed one of the cracks and took a picture. It's not on the underside of the landing yet but, as you can see, it soon might be. I think this looks structural?? It's the same picture with all the landing cracks, in that each follows onto the side of the landing. I think the landings are concrete.

It is possible there is supposed to be a movement joint between the top of the steps and the landing floor slab to allow for thermal expansion/contraction etc.  Also possible the steps were supplied as a pre-cast unit and cast into the floor slabs as construction progressed, leaving a relatively weak joint where any movement is likely to show up.

Either way, cracks of that size and spread in a concrete structure really need the input of a structural engineer to confirm that nothing is seriously wrong.

In the least-worst case - i.e. that there is meant to be a movement joint there - then the floor covering should have been laid to allow for that movement, rather than bridging over it leading to the inevitable cracking and potential trip hazard.

PoGee

Thanks Section 62. I had another look: there are bolted bits. The edges can be seen in the bottom picture - the bolted section is just behind the poles. These bolted sections are on every landing area. Going from left to right is to upper floors. Each crack is in the same section of each landing ( bar the lower 2 landings).

PoGee

Amendment - very top landing looks to be ok so issue seems to be with middle landings.