Thanks mark a few hairline cracks in plaster around the beam but nothing worrying no sign of anything being covered up. Floor is level across the extension (horizontal and in that corner level) slightly off coming from old build to new but this seems to be across the build with a prominent bump in kitchen where they maybe didn’t go down low enough removing bricks?. No issues with bifold doors. We did think it was quite a good build aside from this. Join on the other side is much better also