In an email to the Sustainability Department, Kurt Schroeder, a Rochester, Minnesota resident whose cousin lived in Ylvisaker Hall in the 90's, described a special way to re-purpose old materials. A couple years ago, Luther replaced the windows in Ylvi. Instead of throwing them out, they were posted on Craigslist for $40 a piece. Schroeder had promised his kids a treehouse and needed "something durable that his children would not break." Luther's windows proved to be exactly the thing he needed. To see the treehouse and re-used windows, check out Kurt's blog here.