Using Closed-Cell (or High-Density, or 2 lb.) expanding spray foam, Corbett demonstrates how to both seal against air leakage and insulate at the rim/band joist that runs around the perimeter of many homes, at the top of the foundation wall.
Video Rating: 5 / 5
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Video Rating: 5 / 5
I like your video – very informative. I am also interested in the thermal imaging camera you used… Do you have a make/model for it?
Cheers!
The cc foam is much better than batts, even bats in bags, because it sticks to the surface and guarantees all the little penetrations are filled and air tight. You can also cut blocks of rigid foam and use little cans of foam to seal them in. You should fill the entire rim joist cavity (to the outside of the wall).
Do you have to put a barrier of sheetrock after you’re done spray foaming or can you just leave it? I know that if you use rigid foam board, you need to have a barrier of some sort after you put the rigid foam up.
I would recommend using the Zerodraft A&B foam tank… It works great for everything.
Great video! Don’t forget that you can also use Dow’s easy-to-use Froth-Pak to insulate and seal a rim joist. Check out our channel with another video on sealing this very important area of any building!
That looks like a “FLIR” BCAM, about $4500.
where did he get that infrared device? and what is the proper name for it?
As a supplement yep I think it would help. Assuming the joist is properly sealed and not just sealed but sealed with a sufficient thickness of foam around all the edges.
Did I say anything about sealing the bag? Batts are for people on a budget, your worst case scenario involves the overkill R-30 rim insulation losing R-value. The plastic is just to line the rim, and sides of joist, picture a box with an open side facing the dry side, the batts expand and push the plastic tight. If you keep the inside of your house dry, the batts will stay dry with it.
batts in bags is a bad idea. You cannot seal them in a vacuum; you will ALWAYS have air penetration and ultimately they will be able to trap moisture and condensation internally at which point their insulation properties quickly diminish
Hm. Maybe, but not likely. The rim joist is a weak spot on stick frame homes, but the concrete wall is the same thickness at the wall and at the perimeter of the floor joists. We have seen air leakage at the joist penetrations, but we wouldn’t prescribe this approach generally.
Do you do the same thing if joists are on concrete slab?
Yeah, it’s great in some applications. The plastic bag trick works with batts, but you still have to foam around with one-part spray foam, just like with rigid board. Both BPI and HERS- they complement each other well!
This is one of the very few times I have understood the use of foam. Enough time savings and hard to reach gaps to justify its use. I have a feeling if you were to cut pieces of faceless r-19 properly, throw them in plastic grocery bags and tuck them in there neatly, better r-performance for less+air seal. I have seen many two stories where the floor joist were open through both sides to the attic, thats when I pull out that particular trick, except using r-30. Dig the basement. BPI or HERS?
So Educational! watch them all. check out the site
ugly basement but a pretty good demonstration congrats!
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@BuranLyoko You should be able to find a bag of Mesclun Mixed greens that would substitute nicely.
@quepajaro dont understand your question…unless where you live that there are actually many different types of thyme and dill, but thyme and dill are just herbs, not that many variation of them…
thyme is thyme, dill is dill…
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this is too edited to follow. what thyme? what dill?
spinach would be an ok substitute for arugula, but it won’t have the nutty-spicy flavor that arugula would add.
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Are there alternatives to the baby arugula? There is no way I could find that at my local food store.
kool!