Structural issues with extension?

[vanessa1357]

Hi I have recently moved into a 1930s bungalow which had a single storey with extension added in the 1970s. At first I noticed a crack that runs along the join of the extension to the main house at one corner which is both external and internal. Also recently though I've noticed the floor bumps where the extension meets the main house. I ripped up the lino tonight and there's a crack that runs along the concrete floor. I'm do worried about it incase it's a major structural issue. Could someone please give me some advice.

Thanks so much

 

[Notch7]

So you have a bungalow and an extension, they will both have their own foundations, so if there is any ground movement the 2 structures might move differently to each other.
It doesn’t mean that each structure is not stable, they probably are….on their own foundation.

Shrinkable clay soils and trees in the zone of influence might cause movement.

I personally wouldn’t say there’s necessarily a serious structural fault, if there was you would probably see diagonal cracks in the main walls, often near corners.

 

[vanessa1357]

Thanks for your reply. The cracking above the kitchen door is a diagonal crack at the corner but it's at the corner of the extension wall, is that concerning? Thanks again

 

[Sunshine32]

I am not a builder but have seen several threads started by yourself relating to this. Have you thought about having a structural engineer or builder take a look at your property?

 

[Deluks]

That doesn't look like a 1970's door, it must have been added later. Not unusual to see cracks around replacement doors and windows.

Nothing here seems to be a problem beyond needing redecorating.
Self levelling compound can take up any minor inconsistencies in the floor, and plastering and decorating will hide the cracks. Although be aware that existing cracks can change with seasonal movement.