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.

learn more… | top users | synonyms

4
votes
3answers
3k views

Should I use foam spray insulation in my crawl space?

My crawl space has no insulation. The dirt is wet near one of the walls. There have been termites in the past. I'm thinking of insulating the ceiling (between the joists) and the walls with foam ...
3
votes
1answer
350 views

Extra insulation for panes of aging windows

The original windows on my 30-year-old house are insulated pretty well around the frames, but the panes themselves transmit a lot of cold air, especially when things drop down into the single digits, ...
3
votes
1answer
565 views

Is this insulation supposed to be there?

I was adding some insulation foam into our fireplace as a way of stopping drafts from the chimney. It's obvious that it's installed so we won't ever have it there when a fire is lit (we have not yet ...
16
votes
5answers
3k views

How can I insulate my garage door?

Over the past year I've been converting our integrated garage so that it's a usage space. I've painted the walls, got lighting, power and water connected (To allow for a washing machine to be ...
5
votes
3answers
3k views

What material should I use to insulate floor over a bumpout?

My dining room has part of it bumped out about 2 feet overhanging from the foundation. The floor over this overhanging part gets cold in winter and I'm thinking about insulating below it. I've done ...
6
votes
4answers
10k views

Why is one bedroom always colder than the rest of the house?

We have a two story home with 3 bedrooms upstairs. Home is 7 years old. One of the bedrooms is always around 5-6 degrees Fahrenheit colder than the rest of the house (when compared to the thermostat ...
5
votes
2answers
567 views

How do I fix incorrect attic insulation?

I have loose fill attic insulation. It seems to have been moved around and become compact. Is it just as easy as getting in there with a broom and 'fluffing' it up and moving it around, or do I need ...
3
votes
2answers
2k views

How do I repair a drywall ceiling when there is blown in insulation above?

I was finishing the space above a garage. The space was buried in blown in cellulose insulation and we framed in some walls, laid a subfloor, and finished the room. During framing two different ...
4
votes
2answers
1k views

What happens when a vapor barrier is too close to the cold side?

The vapour barrier must be installed on the warm side of the wall, that is on this interior side of the house. It is permissible to have it sandwiched in the middle between two layers of insulation, ...
1
vote
2answers
2k views

How can I seal around a light fixture/light switch outlet?

I Have a house built in 1972. I'm currently 80% finished in installing a ceiling fan into my master bedroom. I had an energy audit about a month ago, which revealed that I had "pretty good sealing" ...
2
votes
2answers
228 views

Check heating pipes for thermal leaks

I would like to check basic thermal leaks of the house heating system (and perhaps the house thermal insulation as well). As the professional services or equipment (thermocamera) are very expensive, I ...
2
votes
1answer
2k views

How do I prevent window drafts?

I live in Florida. I have noticed that in the Winter it seems that the cold air leaks through the windows and into the rooms. This, of course, raises my energy bill for heating (yes we have to turn on ...
2
votes
2answers
1k views

Is a vapor barrier necessary beneath blown in cellulose insulation in a garage ceiling in a cold climate?

Is it necessary to put any kind of vapor barrier beneath blown in cellulose insulation in an attached garage? The ceiling is sheetrocked, but that's it. It's a cold, dry climate (north half of ...
7
votes
2answers
910 views

Should I insulate steam pipes in the basement?

I have a steam-radiator heating system. The furnace is in the (unfinished) basement, and the steam-carrying steel pipes spread out across the basement ceiling before going up into the rest of the ...
7
votes
6answers
6k views

Is insulating an unfinished basement worth it? If so, how should I go about it?

I have an unfinished, well waterproofed basement with cinderblock walls and a concrete floor. All but the top 6 inches / 15 cm or so is underground. Would it be worth insulating the walls down there? ...
1
vote
1answer
392 views

Additional Vapor Barrier with Faced Insulation?

When installing faced insulation into exterior walls, are there any benefits or detriments to adding an additional vapor barrier to either the non-faced side of the insulation?
3
votes
2answers
2k views

How do I insulate around a gas fireplace without tearing it apart?

My home has a gas fireplace that we do not use very often. It is in a "bump out" on the back of the house. In the winter, cold air flows through the vents under the fireplace and if you feel the ...
8
votes
2answers
1k views

Should I insulate an attic that's over an open porch?

I have a 6ft (approx. 2m) wide porch at the front of my house. The space above the porch opens into the attic, like this: I'm adding insulation -- R-38 fiberglass batting -- in the attic; do I ...
20
votes
5answers
25k views

I added insulation to my attic rafters, but should I have left room for airflow?

I added insulation to my attic rafters and plugged the space between the outdoors and my attic with insulation. It lowered my heating bill by $150/month, but I've seen some information that I may ...