I had a pack of old attic boards in my shed. They've been there for 10 years or so. I got them out today to lay them in the attic and found the packaging had broken and some damp had got in. One end was white and flaky enough to crumble with my fingers. It hasn't gone far down the board.
I have screwed this into the attic joist but after doing so I had some doubts. If the board has rot - which I presume it did - could that now get in to the joist?
The damage seems to have occurred in the wet and my loft is pretty dry. Plus the damage is old and the rot may well be long dead. Even if not the tiny patch of damage in 10 years suggests its super slow.
But am I running a terrible risk here of destroying all the timber in my roof by spreading For?