Warren Buffett has been buying large blocks of USG Corp. (USG) the maker of drywall, wallboards and a host of other construction products.

After raisng his stake to over 17%, and seeing that the stock has taken a 61% haircut since April of this year, I went ahead and added a few shares for my own account.

I also took a look at this list of companies owned by Berkshire Hathaway, and USG seems to fit very nicely. I don't know if Buffett will buy the entire company, but I wouldn't rule it out.

Here are some building related companies that Berkshire did buy;