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-   -   So the fun begins on my Basement Renovation (http://www.buildinghomes.ca/community/forums/showthread.php?t=24428)

good2know 2019-01-18 05:16 PM

Quote:

Originally Posted by TDIGUY (Post 335401)
So looking for some opinions on this part.
All the perimiter walls are framed tight to the foundation wall (no 1"gap)
I would really like to avoid having to reframe the entire perimiter of the house. Is it OK as is or should I pull it out the 1"?

Follow up question, the walls are all yellow batt insulation. Is it worth replacing it as i go? I will be checking it all for moisture or damage and checking the foundation wall behind as I go then putting up new vapour barrier. Will replacing it with roxul or similar make that much of a difference overall?

Thanks!

What is the framing thickness and r-value of whats there?

Is there a moisture barrier behind the insulation?

Actually a gap behind the insulation is bad. It allows air flow which you dont want.

TDIGUY 2019-01-18 06:08 PM

Quote:

Originally Posted by good2know (Post 335405)
What is the framing thickness and r-value of whats there?

Is there a moisture barrier behind the insulation?

Actually a gap behind the insulation is bad. It allows air flow which you dont want.

2x4 framed wall with r13 batt insulation

good2know 2019-01-18 06:28 PM

In Windsor area thats probably enough if its well air sealed. And there is a moisture barrier on the concrete side.

For sure you will want to pull the insulation in the headers areas and seal all the joints around the rim joist. Lots of air leaks there.

TDIGUY 2019-01-18 08:41 PM

Quote:

Originally Posted by good2know (Post 335407)
In Windsor area thats probably enough if its well air sealed. And there is a moisture barrier on the concrete side.

For sure you will want to pull the insulation in the headers areas and seal all the joints around the rim joist. Lots of air leaks there.

From what I can see so far is foundation wall, 2x4 framing with insulation and vapour barrier on the inside. Vapor barrier is full of holes from I assume cats in the unfinished area. It will all be replaced and taped as I go.

good2know 2019-01-19 09:03 AM

Its very important that there is a moisture barrier between the insulation and the concrete. This is in addition to the vapor barrier on the warm side.

It is probably black tar paper.

TDIGUY 2019-01-19 09:19 AM

Quote:

Originally Posted by good2know (Post 335409)
Its very important that there is a moisture barrier between the insulation and the concrete. This is in addition to the vapor barrier on the warm side.

It is probably black tar paper.

Ok, I will pull a couple pieces of insulation and see what is there.

good2know 2019-01-21 06:08 PM

Its a good day to check out the rim joist area for air leaks. The cold temps make it very easy.

TDIGUY 2019-01-21 06:14 PM

And it is cold everywhere today.
Looks like tar paper behind the insulation then VB on top.

I'll check a few more spots as I go but hopefully I am good to leave the perimeter walls alone other than replacing the vapour barrier and adding insulation/sealing around the rim joist. I am leaning towards spray foam for that once I get to that point.

TDIGUY 2019-01-21 06:15 PM

As for leaks this house is full of them right now so I am picking away at them as I find them.

good2know 2019-01-22 08:49 AM

This is a good approach.


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