The 2015 International Energy Conservation Code includes more stringent requirements regarding how tight a house needs to be.
The Insulation Institute explains what these new air leakage standards mean and offers steps to help comply in this blog post.
“Best practices reveal that sealing leaks during the framing stage is cost effective when labor is effectively utilized,” the post says. “In this era of skilled labor shortages, preventive methods must not only be effective and inexpensive but must also be easy to install.”
One key takeaway: If you drill it, fill it. Thinking ahead as you build will make you more aware of areas of potential air leakage. Read more in the post.