The edges of attics, referred to as the ‘eaves’, rarely have enough insulation in older homes. The problem is that houses were constructed in a time when energy conservation was not a concern.
When we inspect houses, we frequently make recommendations for more insulation in the attic, but one challenging place to properly insulate on old houses is the eaves
The best approach in these situations is to use an insulation with a higher R-value per inch – specifically, closed-cell spray foam insulation. It’s not necessary to have the entire attic lid insulated with spray foam, but having spray-foam insulation installed at the eaves is a great way to help compensate for the lack of space at these locations.