I work over on Union in the Cotton Exchange Building.

It is also very common for walls to be framed with 2x8 lumber - our research indicates rock wool is the predominate insulation used in Scandinavia and the 2x8 wall with external cavity and internal chase affords the ability to create an R50+ wall assembly.  

He's only willing to buy if he feels it's a 1 in 1000 deal, and he's smart enough that no one's going to put the wool over his eyes and convince him that he's got a 1 in 1000 deal if it isn't.

@Alex Cotton - I've been using rentometer and hotpads to try to find comparables.I think I've pretty much concluded that this deal is a stinker.  

Thanks @Alex Cotton.  

One decent transaction per year will pay for those costs, though2) You're held to a higher standard, and can't pull the wool over little old ladies' eyes to "steal" their houses.    

Rock wool insulation is frequently used for sound deafening.  

As a dyed-in-the-wool techie, I truly appreciate the many creative ideas your present here. 

https://www.redfin.com/SC/Char...   821.00  a  sq ft is what we got for that one.. but for what you did the % returns are great now just build 20 to 30 of them a year like that and your going to be into tall cotton.   ! 

They recommended stuffing steel wool into these passages (outside, at ground level near the foundation where the siding starts), and that stops the mice.