Where to Insulate

1. In unfinished attic spaces, insulate between and over the floor joists to seal off living spaces below.
1A  attic access door

2. In finished attic rooms with or without dormer, insulate...
2A  between the studs of the "knee" walls
2B  between the studs and rafters of exterior walls and roof
2C  ceilings with cold spaces above
2D  extend insultation into joist space to reduce air flow

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. In addition to floors above cold spaces, such as vented crawl spaces and unheated garages, also insulate...
4A  any portion of the floor in a room that is projected beyond the exterior wall below
4B  slab floors built directly on the ground
4C  as an alternative to floor insulation, foundation walls of unvented 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

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