How do you insulate a basement so it won't go moldy?
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What is the best way to Insulate a basement and floor joists that are embedded into the concrete?
David Pereira
April 28, 2020Last updated: Sept. 11, 2020
Hi, I have recently purchased a home in Toronto. We had some water issues and I've opened up the walls where I found some mould to see that the previous owners installed batt insulation directly onto the concrete wall and didnt have a vapour barrier. I've also noticed my joists are embeded into the wall. How would I properly insulate my basement wall and the embeded floor joists? Right now the home has roxul insulation in the ceiling space as sound proofing and the roxul/batt insulation is in the ceiling space right up against the exterior wall.
Installing batts of insulation directly against a basement concrete wall is a disaster for sure. That was unfortunately a common building practice in the past and a lot of homeowners are having an unfortunately similar discovery. Do you mean that there was no vapour barrier afterwards/ that would actually be a bit better. There was usually a poly vapour barrier installed after the insulation and stud wall seemingly to ensure it would go moldy as quickly as possible. Either way, if you are getting mold and you have a stud wall with batt insulation against concrete then I don’t see a whole lot of alternatives beyond removing it and redoing it. here is a page that will help –
How to renovate basements so they don’t go moldy
除此之外，你指出的另一个问题是在混凝土中嵌入地板托梁。这是你需要小心的另一个问题。混凝土是多孔的，因此它可能不受外部水分的保护，它将保持潮湿。在这一点上，我们通常的建议是让它们暴露在外面。如果你用蒸汽屏障覆盖它们，甚至喷上泡沫，这将阻止它们干燥，可能会导致腐烂，这是另一个你真的不想打开的蠕虫罐。
Hey David, do the wooden joists come through to the other side of the concrete, or are they embedded in pockets?