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How to Insulate my Crawl Space?

I have a small House with no basement, the ground level is 650sq feet. I would like insulate it but sofar have found different feedback and just wanted to find out what is necessary? Some say I just need to put the fiberglass between the joists and put some chickenwire underneath it to hold it in place, others say that I need to first line the entire crawlspace ceiling and joists with polyethylene plastic then put in the fiberglass and cover it with this breathable black sheeting ( sorry don't know the name for it ). Others say my crawlspace is already insulated because of the lining on the floor and the side walls have fiberglass. I live in Canada and we are having now 5 degrees already and the floors are cold in the House and I hear the heating going on a lot. We go as low as -35C in the Winter sometimes.I am attaching to links to pictures of my crawlspace. http://farm3.static.flickr.com/2323/1594449409_cbb...

http://farm3.static.flickr.com/2334/1595334540_d93...

3 Antworten

Relevanz
  • vor 1 Jahrzehnt
    Beste Antwort

    I also live in Canada as you can tell by my name.

    You need to staple 6mil poly to your floor and joists(warm side just like your inside walls) It's a real pain as I have done it before but is required for moisture. Then use at least R20 insulation and some straping of some kind to hold it up till you can put the donacona(sp) board up. Because of the poly the insulation will want to slide out. Just some plastic strapping(banding) used for banding things on pellets is good and can be left on. You can staple that on as well. When putting on the donacona board, use 2" by 2" peices of ridgid plastic or 1/8" board and nails or screws to hold it up. It's really weak and will droop or fall off the nails unless you use the small squares to hold it up. Also, insulate any and all piping under there. This includes water lines, sewer lines and heating ducts. It's a real pain to do all this in a crawl space but you'll reap the benifits when your heating bills drop and your place is warmer.

    Have fun!!!!

  • vor 1 Jahrzehnt

    This was a answer I gave a week or two ago which should cover your questions; the original question was what to put down on the floor area of a crawlspace: From Wisconsin: 3 mil or 6 mil plastic will work, the 6 mil might be hard to find in rolls large enough, 6 is thicker and would be better. Here we typically put down the 3/6 mil and cover it with 3/4" wash stone. Someone above mentioned pouring a thin layer of concrete; yes this would be wonderful and I have seen it done but generally is not done due to the added cost. I would rather see the inside of the crawlspace walls insulated (styrofoam) and the plastic (& wash stone) on the ground. This can assist in any radon concerns and if you ever have to work in there it gives a clean floor to be on. As long as the sidewalls are insulated I would prefer not to insulate the underside of the floor, any leakage from above is going to create a real mess and potential for mold. Probably one of the biggest things for a crawlspace no one touched on is ventialtion. If you do not have side vents for the crawlspace I would closely monitor the moisture levels down there for a year on a monthly basis, any signs of mildew/organic growth start to develop and I would add vents. Usually older homes are not as tight and naturally breathe, we are starting to see more issues on newer homes due to be almost to tight.

  • vor 1 Jahrzehnt

    Your crawlspace walls might be insulated but the floor looks like dirt to me. I would use Fiberglass between the joists, 'chicken' wire to hold it in place, then a plastic vapor barrier to cover it all up. I noticed your heating ducts are not insulated, you're losing a lot of energy there. Make sure you get those insulated (completely surrounded). Lastly, if you have vents in the crawlspace walls close them for the winter to keep drafts out.

    In short, you should have fiberglass, and seal everything up.

    Quelle(n): Building my own house now with similar crawlspace in Michigan, have done the research.
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