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Old 04-15-2013, 04:59 PM   #1
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basement framing


i want to frame out my basement walls. i dont have any water coming in so that is a good sign! should i put tar paper against the block wall then frame the wall and leave a little of room for insolation to be between the wall and 2x4 and that room will also help me frame each stud at a time and avoid in perfections in the block. i dont really want to put the studs right against the block so im thinking tar paper should work. then isolate between the studs and then plastic for a barrier then drywall?

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Old 04-15-2013, 05:06 PM   #2
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Where are you located? Is your basement below grade or walkout?

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Old 04-15-2013, 05:20 PM   #3
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In basements there are several issues:

1. Moisture that comes through the wall from capillary action.
2. Moisture that comes in from hydrostatic pressure.
3. Ambient moisture.

Your basement should have had waterproofing applied to the foundation to arrest 1 and 2.

I would build the walls about three or four inches from the foundation. Insulate with the vapor retarder toward the warm side, and drywall. Putting in various barriers all over the place can cause a lot of trouble in a basement by trapping moisture. If you have an active Water problem you have to address it. The vapor retarder that comes on fiberglass bat is fine.
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Old 04-15-2013, 08:57 PM   #4
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basement framing


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Where are you located? Is your basement below grade or walkout?
below
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Old 04-15-2013, 08:58 PM   #5
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Originally Posted by jagans View Post
In basements there are several issues:

1. Moisture that comes through the wall from capillary action.
2. Moisture that comes in from hydrostatic pressure.
3. Ambient moisture.

Your basement should have had waterproofing applied to the foundation to arrest 1 and 2.

I would build the walls about three or four inches from the foundation. Insulate with the vapor retarder toward the warm side, and drywall. Putting in various barriers all over the place can cause a lot of trouble in a basement by trapping moisture. If you have an active Water problem you have to address it. The vapor retarder that comes on fiberglass bat is fine.
yup so im on the right track. i dont need the tar paper or anything on the actual block wall but i could if i wanted to?
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Old 04-15-2013, 11:37 PM   #6
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basement framing


no tar paper and no poly on inside of wall.
http://www.buildingscience.com/docum...g-your-basment
Search this forum for insulating basement and buildig science and you will find a lot of info.

For me it's 2" XPS then 2x4 studs with insulation and no poly.
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Old 04-16-2013, 09:22 AM   #7
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yup so im on the right track. i dont need the tar paper or anything on the actual block wall but i could if i wanted to?
Its your house. You can do anything you want, but why would you want to do something that could cause problems? I dont even know how you would install the tar paper (Asphalt Saturated Felt) but you might get condensation on the outside of the felt which will cause mold.
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Old 04-16-2013, 08:09 PM   #8
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Its your house. You can do anything you want, but why would you want to do something that could cause problems? I dont even know how you would install the tar paper (Asphalt Saturated Felt) but you might get condensation on the outside of the felt which will cause mold.
ok true thanks
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Old 04-17-2013, 06:14 PM   #9
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no tar paper and no poly on inside of wall.
http://www.buildingscience.com/docum...g-your-basment
Search this forum for insulating basement and buildig science and you will find a lot of info.

For me it's 2" XPS then 2x4 studs with insulation and no poly.
So you put the insolation flat on the block wall then frame over that?
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Old 04-17-2013, 06:17 PM   #10
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So you put the insolation flat on the block wall then frame over that?
Thats the way I did it
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Old 04-18-2013, 06:01 AM   #11
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Thats the way I did it
you just use furring strips to hold the insolation up then or you just use the studs to hold it in place? whats a good r-value to have for insolating basement walls? thanks
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Old 04-18-2013, 09:32 AM   #12
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I used PL300 in a 1'x1' grid on the back of each 2" XPS Sheet (R-10). Then I taped the seams and framed a 2x4 wall in front of the XPS. The 2x4 framing holds the sheeting in place.
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Old 04-18-2013, 12:33 PM   #13
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Originally Posted by jagans View Post
In basements there are several issues:

1. Moisture that comes through the wall from capillary action.
2. Moisture that comes in from hydrostatic pressure.
3. Ambient moisture.

Your basement should have had waterproofing applied to the foundation to arrest 1 and 2.

I would build the walls about three or four inches from the foundation. Insulate with the vapor retarder toward the warm side, and drywall. Putting in various barriers all over the place can cause a lot of trouble in a basement by trapping moisture. If you have an active Water problem you have to address it. The vapor retarder that comes on fiberglass bat is fine.
I couldn't recommend anything but unfaced batts or ROXUL for the wall cavities.

I also recommend using No.1 grade lumber,building the walls on the floor 1/8 inch smaller than your lowest reading across the span,then raising them into place,shimming and leveling thereafter.

If you haven't a flat 4 by 8 area,buy a couple of sheets of plywood and a shim pack,level plywood on floor and keep the kids off it!!! Good Luck
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Old 04-18-2013, 06:10 PM   #14
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basement framing


Where are you located, jhack836?

Gary
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Old 04-18-2013, 10:04 PM   #15
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Where are you located, jhack836?

Gary
se wisc

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