Hello
Has anyone used this building material for insulating an old slab/basement floor (http://www.epscement.com/).
I have a thread under the floor section but never got any response.
The material is quite expensive, 100mm/m2 costs 300 and still needs to be cast over.
Can anyone recommend this method?
Or should I start over, using polystyrene 150mm+cement? And roughly what would this cost in materials?
Has anyone used this building material for insulating an old slab/basement floor (http://www.epscement.com/).
I have a thread under the floor section but never got any response.
The material is quite expensive, 100mm/m2 costs 300 and still needs to be cast over.
Can anyone recommend this method?
Or should I start over, using polystyrene 150mm+cement? And roughly what would this cost in materials?
We will be casting with EPS in our bathroom. We had to pay 150:- per bag. But a 17kg bag gives 50 liters of finished concrete, so I don't think it's that expensive. Additionally, it provides some insulation. Over the EPS, we will use Finja's Bemix P3. It can be covered after 3 days and costs us 80:- for a 25kg bag. Personally, I think this seems superior, considering drying times, etc. However, if you have time to wait for regular cement/concrete, it is indeed a cheaper alternative. But then you also have to account for costs like foam board, for example.
Hello!
I was also considering using this, but given that my floor had a significant slope, the ceiling would become very low, considering that you need to pour at least 5cm. This does save the back since it doesn't weigh nearly as much as regular concrete.
Guran1
I was also considering using this, but given that my floor had a significant slope, the ceiling would become very low, considering that you need to pour at least 5cm. This does save the back since it doesn't weigh nearly as much as regular concrete.
Guran1
50 mm EPS cement insulates less than 25mm Styrofoam. 30mm Styrofoam costs about 25:-/m2 so the EPS cement becomes 3 times more expensive then?
Guran, remember that you need to add additional centimeters to get a floor.
I think I might have to break up the floor if I'm going to do anything at all :-/
Guran, remember that you need to add additional centimeters to get a floor.
I think I might have to break up the floor if I'm going to do anything at all :-/
Hello!
It was just that you had to add another layer on top, which means a total of 7cm. The ceiling height would then be 198, which may seem a bit low. I thought about it for a while, and then I just started, i.e., chiseling, carrying, digging.
Now I have insulated with underfloor heating and 218 in ceiling height. I've also visited the chiropractor......
Guran1
It was just that you had to add another layer on top, which means a total of 7cm. The ceiling height would then be 198, which may seem a bit low. I thought about it for a while, and then I just started, i.e., chiseling, carrying, digging.
Now I have insulated with underfloor heating and 218 in ceiling height. I've also visited the chiropractor......
Guran1
I'm also considering casting with EPS, but the amount scares me a bit to do it myself. I need 20cm EPS on 11m[sup]2[/sup] and it will be over 2 cubic meters... 
I've also been informed that if you're going to replace foam, you need double the EPS.
I've been quoted about 26000:- + VAT to get it done.
I've also been informed that if you're going to replace foam, you need double the EPS.
I've been quoted about 26000:- + VAT to get it done.
Yes, insanely expensive. And mixing it yourself... it seems like you have to be quick as well.
I understood that you had chiseled everything down to the slab. But you haven't?
You mean you have the construction with cellplast then slab, and that you would insulate on top of that? No idea if you can do that.
I have exposed my slab that only has gravel underneath. On top of that, there was 10cm cellplast + 10cm fine concrete. I'm standing and choosing between building up the same way again or with EPSCement. :-/
I understood that you had chiseled everything down to the slab. But you haven't?
You mean you have the construction with cellplast then slab, and that you would insulate on top of that? No idea if you can do that.
I have exposed my slab that only has gravel underneath. On top of that, there was 10cm cellplast + 10cm fine concrete. I'm standing and choosing between building up the same way again or with EPSCement. :-/
In a basement where you have "time" to wait (perhaps not as urgent as a bathroom renovation in a house without an extra shower), I would probably also choose "regular" cement. But if you want to finish a little quicker, I think EPS is an excellent way to fill up with. In our case, I'm going to use it to cast a concrete intermediate floor of about 300mm. Such a slab in real concrete would weigh a lot. Therefore, the EPS is also an advantage. Then that it costs much more than regular concrete, well, everything costs in this world. It depends on whether you prioritize time or money
Well, I currently have a cast basement floor without any insulation. So I'm thinking about if one can lay styrofoam on this and then cast a type of 5cm layer on this, it would be like a "GB Sandwich". But I don't think it's risk-free/practice to do so.Butcher said:
That's how I'm supposed to do it and it's completely OK. The difference is that yours is likely exposed to more moisture (due to the basement), but it should be perfect with that system then. At least that's what I understand. I saw a question on ViiVilla about it (typical that I can't find it again) but try searching for it.
The risk if you lay foam plastic is otherwise that you get moisture in the walls?
The risk if you lay foam plastic is otherwise that you get moisture in the walls?