Well, I don't know for sure if the agent knew about the untreated timber. I'm sure the bloody vendor did though.
The worst thing is, there have been a bunch of builders reports done on the building, including invasive drill testing. All of which turned up that the house is not leaky. Which it isn't. But not ONE of the builders reports picked up on the untreated timber aspect.
It was honestly just down to DH being massively detail oriented, and being in construction project management, and being prepared to read every single page of every document that he turned that info up.
Very very VERY lucky escape indeed.
But I am still gutted, the house was so perfect for our needs :-(
Oh well, according to our neighbours, loads more property come up in summer than winter, so we are best to just hang on......