The toughest details are those that have to match up with someone else's work, or those done — even done well — when energy was really cheap. These details are a collection of some common — and tough — dovetails of existing work with retrofits or additions. Bear in mind that green remodeling means creating a new operating regime that is better, not worse, than the one that may well have been working just fine before. Integration of energy efficiency, moisture management, and indoor air quality is much more important and challenging in remodeling than in new construction.
Basement and slab-on-grade floors can be retrofit to improve thermal performance but not without managing moisture along the way. There are a host of ways to do this, but headroom and clearance at exterior doors often limit the options. This detail (and its neighbors) assumes that standing or bulk water are not part of the deal; if either is, refer to these details: 9-00030 through 9-00033.
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