Here’s a great example of what improved attic insulation will look like on the outside of a building. These town homes share a common wall but no longer share the same inefficient attic insulation. We were called in to help the homeowners of Townhouse B improve their attic insulation before winter arrived. Peeking into the attic a pretty good amount of blown in cellulose insulation was seen. However there were quite a few issues as you probed further.