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Wall insulation questions


Allgood_73's Avatar
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Join Date: Feb 2016
Posts: 2
TN

02-19-16, 01:14 PM   #1  
Wall insulation questions

Hey everyone, first post here but I've referenced the form a lot in the past few years.

Just got done building my Barndominium and I did most of the work... Rewarding? Yes. Scared that I screwed something big up? Yes.

So here's one of my current after thoughts....

I placed R-19 Kraft faced insulation into the 2x6 wall cavities and bumped it directly up to the double bubble insulation wrap that was done on the exterior of the house underneath the aluminum siding. Was this a big no no? I'm now wondering if this is going to cause mold in the insulation since I have a vapor barrier on both sides of the fiberglass insulation.

The best way to show this was drawing it out in a pic... and I got a little carried away... but figured it didn't hurt in case you all see anything else I screwed up.




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chandler's Avatar
Banned. Rule And/Or Policy Violation

Join Date: Dec 2005
Posts: 39,968
GA

02-19-16, 02:56 PM   #2  
Welcome to the forums! I only question the 2x6 posts that appear embedded in dirt. Why are they there? Does the concrete stop inside the walls as shown?

 
Bud9051's Avatar
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Join Date: Oct 2008
Posts: 9,775
ME

02-19-16, 09:37 PM   #3  
Yes, you have a double vapor barrier and yes it is a potential problem. Whether it will actually be a problem is a guess. Keep the inside moisture levels as low as reasonably possible, no swimming pools, and hope for the best, unless you want to take it down and start over.

Bud

 
Allgood_73's Avatar
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Join Date: Feb 2016
Posts: 2
TN

01-05-18, 07:46 AM   #4  
Almost 2 years later and I finally checked backed here, as I never received the notifications. :-\ Sorry about that!

Update after two years: we have high humidity inside the house during the summer (around 70%)... so much so that the two closest air vents to the unit will actually condensate and drip. So during the summer months, we have to run a dehumidifier 24/7 in the house to keep the house at 45% humidity and things have been well (though this obviously should not be needed... it's more of a band-aid).... during the winter the humidity drops to high 30's to 40% with no dehumidifier.

As for the picture, I screwed up on the text for the posts.... those are 6x6 posts for the post-framed barn which are in the ground. Then we did 2x6 framing on 16" centers inside the posts.

 
Bud9051's Avatar
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Join Date: Oct 2008
Posts: 9,775
ME

01-05-18, 08:23 AM   #5  
The intermittent and sometimes lack of notifications is a known problem but doesn't seem to rise high enough on their concern level to justify FIXING IT. Sorry, a little venting there maybe they will read it.

You do have a moisture problem and there is a possibility you can be growing mold in hidden places. If your summer dew point is lower than the outside air then you have more moisture inside than outside. What activities are taking place it those high humidity places? Same goes for the winter, as colder outside air usually is dry.

Are these spaces occupied by people and related activities?

Bud

 
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