One year after buying a brand-new home, Donna discovers she has no insulation in her attic, resulting in ice dams on her roof and water damage inside. Mike Holmes investigates the situation, with the help of a renovation expert, and discovers some surprising new home-building practices. And, in a different story, Paul and Donna hired a roofer friend to install 13 new windows in their home. After a quick job, they are left with sloppy capping and drafts in the house. Mike Holmes pulls off the capping, insulates the windows and makes it right!