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- From: eric@milton.u.washington.edu (Eric Hirst)
- Newsgroups: misc.consumers.house
- Subject: Insulating above a finished attic
- Date: 26 Jan 93 02:27:18 GMT
- Organization: University of Washington
- Lines: 44
- Message-ID: <eric.728015238@milton>
- NNTP-Posting-Host: milton.u.washington.edu
-
-
- I am trying to decide how best to insulate around an attic room, without
- risking moisture trouble. Here's a basic sectional view:
-
- __ Ridge vents in place
- /
- v
- __ Source of worry
- //\\ /
- //======\\ v
- // \\
- // || (2) || \\ <-- Crawl space (drafty, but no
- ---------------------- real vents currently in place)
- || ||
- || (1) ||
- ----------------------
-
- Currently, there is no insulation around floor (2), and it gets
- chilly in the winter and hot in the summer. We can get into the
- crawl spaces to insulate the knee walls, and eventually plan to replace
- the narrow horizontal portion of the ceiling, at which point we will
- insulate there. The question is with the sloping sections between the knee
- walls and the horizontal ceiling. The roof joists are 2x4's covered with
- spaced planks, wood shingles, and then asphalt (well, fiberglass) shingles.
- We could stuff fiberglass roll insulation up in from the crawl spaces, but
- I'm worried about moisture problems in the "source of worry" zones pictured,
- even though the Reader's Digest home repair manual says it's no problem.
-
- The primary options, then, are:
-
- 1. Stuff in the fiberglass, paper side down, and hope for the best. Maybe
- increase ventilation in crawl spaces.
-
- 2. Use some type of thinner insulation. (Styrofoam sheets are expensive and
- a possible fire hazard; a 2" fiberglass blanket might be draped down from
- above when we replace the ceiling.)
-
- 3. Do nothing, or insulate the knee walls only, in order to buffalo the
- next buyer into thinking it's an energy efficient abode.
-
- Any sage advice, particularly on option 1?
-
- Eric Hirst
- eric@u.washington.edu (Seattle, WA)
-