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Insulation is any material used to slow the transmission of heat or reduce the transmission of sound. Typical materials include fiberglass, foam, blown cellulose, and reflective foil. This should not be confused with weather stripping.

4 votes

How do I insulate a whole-house fan during the winter?

In my opinion, the best solution would be to build a box out of rigid insulation board that has a hinged lid. … This allows plenty of blown-in insulation (cellulose, fiberglass, rockwool, etc.) to be installed in the attic without falling into the whole-house fan. …
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4 votes

Is radiant heat in a concrete floor unpleasant in a super-insulated house?

You are mostly correct. The floor concrete won't necessarily be cool; in a super-insulated house, it will likely be the same temperature as the air. However, this may feel cool to your feet since it i …
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3 votes

Easy way to temporarily insulate gap between hardwood floor and baseboard?

You could use "seal and peel" type removable weatherstripping caulk. Some type of caulk would probably be the permanent solution as well.
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1 vote

Is partial double glazing worthwhile?

You can DIY install low-e (low-emittance) storm windows that retain the views and dramatically reduce window heat loss. There are operable storm windows that don't need to be removed seasonally. htt …
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1 vote

How can I reduce heat transfer around my window unit air conditioners?

Here is a video and pamphlet showing how to do what rifaco suggests, as well as some other things to improve window AC efficiency.
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4 votes
Accepted

Should I encapsulate my crawl space?

crawlspace walls on (not necessary in climate zone 1 or 2; and preferably with board foam or spray foam because fiberglass doesn't do well with moisture). probably a good idea to remove existing floor insulation
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2 votes

What is the downside to installing faced fiberglass insulation in a dirt floor crawlspace vs...

"When fiberglass batts are installed in the ceiling of a crawlspace, gravity always wins in the end" source Faced or unfaced, it is almost always a bad idea to insulate the floor above a crawlspace, …
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1 vote

Is there any reason not to use a radiant barrier in the attic?

The benefit of the radiant barrier will drastically decrease when you add R-50 insulation and bury/seal/insulate the ducts. I would skip it in such a moderate cooling climate such as the SF bay area. …
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0 votes

Vented vs unvented crawl space

You already have insulation at the crawlspace walls. If you add vents, it defeats the purpose of that insulation. It is much more difficult to insulate the crawlspace ceiling successfully. …
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