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Old 12-19-2011, 07:06 AM   #16
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Originally Posted by Canucker View Post
I disagree. There is more than one way that is right, we need more info from her before we can help. Is the addition insulated? As GBR pointed out, is the crawlspace sealed off or is it vented? Where is she located? If the ductwork is sending enough hot air and the room is properly insulated, the better way would be to make the crawlspace a conditioned space by insulating the walls of it, if possible. That way the floors stay warm, the pipes stay warm because the concrete isn't acting like a heatsink, pulling the heat from inside the house through the rim and floor joists. Hot air rises, heat moves toward cold.
while that is true the way it is now is my way to insulate would be right..


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Old 12-19-2011, 07:29 AM   #17
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Originally Posted by DIYChick45 View Post
Hey thanks Gary. That's SUPER helpful. I guess basements are difficult to insulate because of the moisture issue.

How would I attach the ridged foam to the block walls in the crawlspace? I think some caulking/glue will eat the foam if I'm not mistaken.

DIY, I am doing a similar project, check out my other topic's. There is a specific sealant that is used to attach the foam-board to the foundation/block wall. In fact I just picked some up this weekend at HD. There is also foundation screws you can use as well if needed.

Also be sure to get down there and seal up/air tighten the crawl space. By this I mean turn out the lights and move around in there and if you can see any light from outside seal up those area's as obviously air is getting in. Seal up the rim joists as well, they were a big factor for me and completely letting air in.

Last edited by cbaur88; 12-19-2011 at 07:37 AM. Reason: More info
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Old 12-19-2011, 07:33 AM   #18
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Originally Posted by ben's plumbing View Post
while that is true the way it is now is my way to insulate would be right..
I think my way is right. But I will agree, it's not right now


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