Diagonal growing crack

warey4life · 2026-01-18T00:17:14+0000

Hello,

I've got a crack problem.
On my staircase I have a crack which starts at the ceiling from an RSJ and runs diagonally down the wall. It's grown about a meter in the last few years but I've noticed recently that it seems to be getting wider. It's about 1mm wide.
Just wondering what to do about it really. Get a surveyor or a structural engineer to have a look? Or maybe a builder?
I've attach photos but not sure they are clear enough.

ree · 2026-01-18T00:39:57+0000

OP,
Typically, 1mm-2mm cracks are often not significant.
Is the RSJ supporting a loft conversion floor?
There's shadow near the crack - is it a damp patch?
Is that an external wall? Is it rendered? Any external mirror cracks?
Is it a solid wall or a cavity wall?

diynot

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local

Diagonal growing crack

warey4life

Attachments

ree

DIYnot Local

Similar threads