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insulation, insulation removal, spray foam insulation

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Examples of 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 "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
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 crawl spaces and unheated garages.
4A. Also insulate 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 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 and doors.
Source: Oak Ridge National Laboratory