Hi guys, I was wondering whether anyone could give me some insight into what the strange white marks on my ceiling rafter are (photo attached)? They appear only on one part of the beam, but the same marks appear in exactly the same place on the opposite side of the beam in the adjoining room (I'm unable to see the top or the bottom of the rafter as it is part of an interior wall).
Aside from the colour they look and feel exactly the same as the rest of the wood, i.e. they're not spongy or soft or obviously decaying. But they're certainly not just stains that can be cleaned off.
I have no idea how long they have been there as I'm a tenant and I've only just noticed them, but I wanted to check that they are not some sort of nasty rot that needs to be dealt with...
Aside from the colour they look and feel exactly the same as the rest of the wood, i.e. they're not spongy or soft or obviously decaying. But they're certainly not just stains that can be cleaned off.
I have no idea how long they have been there as I'm a tenant and I've only just noticed them, but I wanted to check that they are not some sort of nasty rot that needs to be dealt with...