Cracks in the ceiling of single storey kitchen extension

[^woody^]

It seems fairly typical to me.....but on the severe side.

Theses days structural timbers like ceiling joists are stored outside at the builders merchants -they often arrive on site totally saturated.

If the weather turns wet during the build, it gets soaked more.

its not a surprise the plasterboard cracks as it all dries out.

These days walls crack as well -thermalite blocks are so weak they crack -they are in fact weaker than the mortar -Ive seen loads of new extensions with floor to ceiling cracks (bonding and mulitfinish, not dot n dab).

You're making it sound like every extension has or should have these cracks, then thats not at all the case.

Plaster cracking after building works is invariably down to quality of installation and is totally avoidable. Even the potential for the OP to have caused the cracking by cranking up the heating, does not remove the builder's responsibility for the cracking occuring in the first place by not building in suitable measures to prevent it.

 

[Jay003]

Well just to add to my ceiling cracks I’m starting to worry about the staircase and the cracks showing on that! I’ve staircase to the first floor and to the loft bedroom. Pics show examples of the cracks. Would you say these are non-serious or look something more structural? Thanks

 

[^woody^]

They are all heat/humidity related

 

[Jay003]

Thanks woody, appreciated