1A attic access door
2. In finished attic rooms with or without dormer,
2A between the studs of "knee" walls;
2B between the studs and rafters of exterior walls and roof;
2C ceilings with cold spaces above;
2D extend insulation into joist space to reduce air flows.
3. All exterior walls, including …
3A walls between living spaces and unheated garages, shed roofs, or storage areas;
3B foundation walls above ground level;
3C foundation walls in heated basements, full wall either interior or exterior.
4. Floors above cold spaces, such as vented craw spaces and unheated garages. Also insulate …
4A any portion of the floor in a room that is cantilevered beyond the exterior wall below;
4B slab floors built directly on the ground;
4C as an alternative to floor insulation, foundation walls of un-vented crawl spaces;
4D extend insulation into joist space to reduce air flows.
5. Band joists.
6. Replacement or storm windows and caulk and seal around all windows and doors.