Building in pest infestation?

[drerkle]

I have a two-story house from 1918 with a frame made of standing timber. The house was renovated in the 90s with additional insulation, encapsulation of the crawl space, a new roof, etc.

We are now going to extend the hall, and I have started to dismantle the panel. During the work, I discovered damage to the sill and one of the standing posts in the wall. None of the newer wood (from the 90s) is affected. I can't see any larvae or other pests. It seems only the outer 1-3cm are affected, the wood inside is healthy. After searching forums and Google, my guess is blåhjon, but who knows?!

The question now is what should I do. Anticimex could come in a month, and I can't proceed with the construction. As it stands now, the structure is not affected.

Can I remove the damaged part and build around it?
Do I need to treat it?
Other thoughts and ideas?

I also don't want to build around this and have to tear everything down again in a few years 🤯

 

[StyvBoard]

The question now is what I should do. Anticimex could come first in a month and I can't proceed with the construction. As it stands now, the structure is not affected.

Can I remove the damaged part and build over it?
Do I need to treat it?
Other thoughts and ideas?

Not much response here...what did Anticimex think?

 

[drerkle]

Not much response here... what did Anticimex think?

I was able to incorporate it; it was a very old damage caused by pests that require moisture. Now it's been dry for 30+ years. So I only lost a week or so.