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Old 2018-08-09, 02:47 PM
Halton Home Inspector Halton Home Inspector is offline
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The "black paper" is asphalt treated felt paper which is mostly used as a cheap minimum standard eave protection on roofs. It can also be used as a house or foundation wrap but synthetic materials are typically used today.

Tyvek for example is a synthetic non-perforated product with microscopic pores that are so small that air like wind and water have a difficult time passing through but it is still breathable and moisture vapour can easily pass through it.

Therefore - these breathable materials block water but allow vapour to pass through them. They are not required between the foundation and the insulation.

The vapour barrier is always on the warm side which in Canada is the interior of the home.

BUT,,,,, we are in a conundrum being in Canada, where in the summer the warm side is the exterior and the cool side is in the basement. That is why we have condensation behind the vapour barrier in the summer.

BUT,,, winter trumps all when it comes to code rules. Thus the vapour barrier must be on the interior side of the insulation.
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Old 2018-08-16, 11:46 AM
hjuandok hjuandok is offline
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Join Date: Apr 2017
Location: Barrhaven
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Originally Posted by r_dogs View Post
I'm going to remember this post, as I have a new build coming up as well (however, no finished basement).

Just curious - you mentioned: "They installed insulation directly on the basement concrete and vapor barrier it". Is it not normal to put the insulation on the concrete? Or is there supposed to be something in between the concrete and insulation?
A smarter way to do this, is to frame the exterior walls away from the concrete. You leave a small gap about an inch or two, the insulation doesn't touch the wall itself. Its not just cracks that cause moisture problems. For us it was the fact that the concrete wasn't allowed to dry.

I'd seriously consider pressuring the builder to remediate the mold that's in the air and not just 'fix' the leak and the finishes. When the mold is disturbed it'll spread throughout the house. The crew that came to remediate the mold at our house scrubbed the upstairs too because test results showed the mold everywhere. And people were having health issues. We had the HVAC cleaned too.

Last edited by hjuandok; 2018-08-16 at 11:55 AM.
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Old 2018-08-17, 11:27 AM
OttawaG OttawaG is offline
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Molds are a huge health risk, hope the builder resolves the issue without much delay....
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