Rotten joists

[garak112]

Anyone know the best way to deal with rotten joists and the wooden plate they sit on?

History is that when we moved into our house a downstairs room had bad damp caused by a drive bridging the DPC. I cut this away a few years ago and I finally got round to decorating this week.

I lifted the floor to find the ends of all the joists show evidence of wet rot to some extent and the wooden plate (sole plate?) is falling apart. My screwdriver went straight through it.

What do I need to do?

https://ibb.co/jqXwTk
https://ibb.co/js4X15
https://ibb.co/fDwO8k

 

[garak112]

That looks like the ticket. I'm not averse to replacing all the joists if necessary but it seems like a lot of extra work if only one end needs doing.

What do I do about the horizontal wooden board that they sit on in the wall? Replace with more wood or something else?

 

[garak112]

Only rotten where it goes into the wall on one end.