EPS deck for suspended concrete slab – good or not so good?
嘿，大家，
So I’m finishing up the foundation walls for the front basement extension of my reno. I am using 6″ core ICF to form the 3 walls which extends the basement forward and will eventually create a front porch. This is similar to how people do cold rooms under their porch, but I am doing this as part of the conditioned finished basement space.
对于顶部的混凝土板，我计划使用EPS混凝土甲板。EPS甲板是我与之讨论的产品，但是Insul-Deck是一个更熟悉的品牌，可以做同样的事情。
I figured it would be efficient with the build and with achieving good insulation for the envelope. The thickness of the EPS deck would be 10″ with a 3″ concrete slab on top. This thickness would just meet my code minimum of R31. The area of the top of the deck will be roughly 5’x14′.
I’d like to ask if anyone has any experience with these deck systems and to open discussion on alternatives.
After doing some thought on it, I now have some reservations. One being that EPS isn’t the most efficient in terms of R value per inch. I would just barely be meeting code. R31 isn’t bad but I’d like to do better for higher performance. Second I noticed the flutes that create the concrete joists are quite wide. They take up a lot of volume compared to normal joists, which take up a lot of potential insulation and performance as well.
I was wondering if I would be better off with a more “conventional” wood joist and plywood deck with concrete slab assembly, or a corrugated steel pan slab assembly. Either of these would allow me to 2lb spray foam underneath to really improve the R value & performance.
Does anyone have any experience with this?
杰米
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Replies
杰米,
I imagine this is a good system, although it's probably expensive. If you want a higher R-value, you can always glue more EPS to the basement ceiling once the slab has been poured.
If your porch gets any wind-driven rain or snow, remember that you'll need a waterproof layer above the concrete -- some type of peel-and-stick.
嗨，马丁，
Actually the cost isn't too bad for the EPS deck. They've quoted me about $2,000 CAD for the system. Considering the materials, labour & spray foam to do it another way, it's competitive. But just looking for advice on how other people did their assemblies.
我不想进入的是一个8英寸的悬挂式混凝土板，它会占用大量的头顶房间，不会在甲板下方留出太多的空间来运行机械和获得良好的绝缘材料（没有放下地下室的天花板高度，我不想这样做）
关于防水，我计划在顶部完成混凝土，此甲板也不会被覆盖在头顶上，因此它将暴露于大量水中。我打算在顶部进行抛光的环氧树脂，以实现美学耐用性。我相信这将从顶侧产生防水膜。我还将在平板的下侧（倒入之前）上做一个基于液体的防水膜，作为额外的保险。希望使用该系统，从顶部泄漏的任何小漏水都可以使平板从边缘向外部干燥。
杰米,
我认为，由于美学原因，您的所有选择都包括一块混凝土板作为上面的成品门廊表面，因为它使您的所作所为变得非常复杂。
如果您想要暴露的平板，则需要下面的膜，如果您希望保护下面的区域免受泄漏的影响，则不要依靠环氧涂层。鉴于这一点，为什么不像房子的其他地方那样将门廊从木头上弄清楚呢？然后，您可以将平板倒在顶部。我自己的偏爱，因为我喜欢能够在条件空间上遇到潜在的有问题的组件，例如在条件空间上，是在膜上使用摊铺机。有许多专有系统将摊铺机放在椅子上，以创建下面的排水平面。
这是我确实在使用它们的小甲板：
嗨，马尔科姆，
Awesome input, thank you.
我明白了您在用木头构架门廊甲板，然后将平板倒在上面。我可能会使用I-咖啡师，以便我可以通过网络进行管道工作，然后喷洒整个底面的泡沫。与混凝土复合系统或EPS甲板相比，I托梁在网络之间有更多的空间，我当然会得到更多的绝缘材料。
我看到的一个问题是，如果我将3/4层夹在平板和闭孔喷雾泡沫之间，则很可能会腐烂。另一个问题是在木头之间的细节中，就像在ICF基础墙壁上创建横梁口袋以使托梁的高度完全正确。等等
我明天打电话给Canam打电话，看看他们要说些什么。他们的Hambro D500复合系统显然只是打开的Web钢托梁，您可以在没有底面甲板的情况下在顶部形成3英寸的平板。
杰米,
我担心的是依靠平板作为防水扁平屋顶。因为使用CANAM，平板是结构不可或缺的，所以与平板只是成品甲板表面相比，很难将膜引入屋顶。询问CANAM是否有您提议的细节。也许他们有一些工作。
Edit: With an all wood structure, couldn't the beams, and joists all sit on top of the ICF much as they do any concrete foundation?
杰米,
无论您做什么，都请记住，混凝土板不是屋顶。