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Old 03-02-2010, 09:42 PM   #16
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I realized after re-reading you are doing a basement
So you want the studs to line up on the inside - since there isn't an outside
Either layout will work
The one on the right allows for insulation to go behind the stud
Basements have special considerations, you need to consider water vapor & water intrusion
Most go with rigid foam against the cement

The one on the left you may not need the 3rd stud in the far corner




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Old 03-02-2010, 11:28 PM   #17
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This thread has a ton of framing pictures you might be able to use for some reference and some information you really need to consider when framing for a finished basement....Fire blocking!
http://www.diychatroom.com/f98/how-f...framing-37190/
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Old 03-03-2010, 08:03 AM   #18
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I wonder why some bright spark out there didn't suggest 2x6 wall studs, spray-foam insulation, 6 mil vapour barrier, all sealed and taped, and 3/8" drywall covered by two coats of paint...?

Guesses anyone?
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Old 03-03-2010, 08:30 AM   #19
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Quote:
Originally Posted by LiquidSlap View Post
ok take a look at the pic and tell me if I am correct.

http://tinypic.com/r/2hpiqzc/6

EDIT: wait, I forgot to account for the drywall. Ok move the left measurement down 5/8". That would be correct right?
On one of the corner measurements you need to take into account the 1/2" drywall

Where are you located ?
How much insulation you need depends upon where you are



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Old 03-03-2010, 09:01 AM   #20
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Bingo.
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Old 03-04-2010, 06:37 AM   #21
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Quote:
Originally Posted by Scuba_Dave View Post
On one of the corner measurements you need to take into account the 1/2" drywall

Where are you located ?
How much insulation you need depends upon where you are
Metro Detroit, MI area
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Old 03-04-2010, 08:14 AM   #22
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For insulation I'm planning on Rigid foam against the concrete, probably 1/2 to 1"
Then build a stud wall againts that & use R13 insulation in the wall

Below grade your area looks like R10 Min insulation
So you could put in 2" rigid against the wall & the not use any fiberglass



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Old 03-04-2010, 09:31 AM   #23
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Quote:
Originally Posted by Scuba_Dave View Post
For insulation I'm planning on Rigid foam against the concrete, probably 1/2 to 1"
Then build a stud wall againts that & use R13 insulation in the wall

Below grade your area looks like R10 Min insulation
So you could put in 2" rigid against the wall & the not use any fiberglass
I had planned on just framing out the walls and putting up the R13 fiberglass insulation between the studs. Will that be good enough?
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Old 03-04-2010, 09:39 AM   #24
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The fiberglass & studs can't be up against the concrete
Concrete allows water vapor to pass thru which can cause mold
So a stud wall with fiberglass needs to have an air gap between the wall & the concrete 1-2"
And mold could still grow in this area if a damp basement

Most people recommend the rigid to prvent the water vapor from passing thru



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Old 03-04-2010, 10:45 AM   #25
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Quote:
Originally Posted by Scuba_Dave View Post
The fiberglass & studs can't be up against the concrete
Concrete allows water vapor to pass thru which can cause mold
So a stud wall with fiberglass needs to have an air gap between the wall & the concrete 1-2"
And mold could still grow in this area if a damp basement

Most people recommend the rigid to prvent the water vapor from passing thru
Does it make a difference if the home is new construction and the basement outside foundation was completely wrapped with Delta Foundation Wrap as seen here: http://www.basementsolutionsne.com/d...oundation.html
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Old 03-04-2010, 11:43 AM   #26
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As far as I know it still needs either the rigid or the gap between the fiberglass & concrete
However I have not seen that product
It would need to be a complete (outside) seal...walls & floor

The other issue is that heat will radiate thru the wall & any water vapor from inside will condense against the cold concrete wall
So its not just vapor from outside that needs to be considered
With recent rain the humidity in my basement has jumped from 50 up to 70%

In addition only pressure treated studs (PT) can be installed against concrete



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Old 03-04-2010, 12:40 PM   #27
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Noob question about having the Rigid foam against the walls. I understand about the water vapour coming through the concrete and condensing.

However, wouldn't the vapour now condense on the Rigid Foam since the foam acts like a vapour barrier?

I know the theory is to prevent the water vapour from the inside condensing on the cold wall, but with traditional construction (in my area) a vapour barrier is in place between the insulation and the living space so in theory, there shouldn't be any water vapour reaching the cold wall?
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Last edited by drtbk4ever; 03-04-2010 at 12:44 PM.
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Old 03-04-2010, 12:54 PM   #28
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Wood is the food for the mold. The foam would hold that vapor out side of the wood and not allow it to mold. Also that would force the moisture through the concrete to the ground.......I think LOL
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