Hi all
Hoping to get some advice
We have some semi long standing (at least a year old since we’ve owned the house) ceiling cracks extending to wall in one room on top floor (attic above). Do these look like anything to worry about? They’re probably about 1mm thick
Vertical cracks would indicate a lack of horizontal restraint, and as you're up in the attic that could be something like a slate roof that has been replaced with concrete tiles which are heavier and have overloaded the roof structure. That ceiling crack is likely to align with any ridge if it's a roof thing. It looks like someone has been there before with some fresher looking emulsion paint to hide a previous attempt to fill these cracks - which indicates against these just being shrinkage cracks. The straight cracks in the ceiling would suggest plasterboard, so this could be a loft conversion that's not all it should be. Information on the age and history of the house would help, as would some indication of roof structure and covering.
It’s 250 years old. The photos are from the room below the attic. Just an attic above the room with nothing in it. The roof was rebuilt at some point - probably around 20 years ago. Walls are original lime plaster
You often get cracking in plasterboard ceilings at the joints, especially if they aren't taped. Is there any corresponding cracks on the exterior walls?
Nope - this is an internal wall and the ceiling crack is opposite end to external wall. No cracks externally. Has had quite a lot of humidity change in room and a leaking roof at other end of the room …