BCI more economical - Insulating shuttering blocks

[ojal]

Hello,

You may know the insulating shuttering blocks.
Below an example:


The picture comes from this site: http://www.prodiscar.fr/isolation_exterieur.html

Concrete is poured into the formwork, the formwork being the insulation.

The idea is not silly, but the material used is PES ... Not very econological ... Also, I was wondering if another material could be used?

The PES is perhaps a lesser evil then the energy savings it will produce for many years?

What do you think?

[dedeleco]

e material used is PES ... Not very econological ..

but also the concrete that makes a lot of CO2 except recovered by growing seaweed!
In my opinion the PSE is not worse ecologically than concrete !!


So build good wood insulating as antiseismic but less resistant to attacks of insects and fungi, except well prepared in the old as the old woods 300 800 years (frames of cathedrals, old market halls or the castle of Versailles, etc.. .), but we do not know how to do it anymore !!

[ojal]

It's true that concrete may seem like a strange choice ... Nevertheless, it has a superb thermal inertia that wooden houses do not have ...
You will tell me that we can make earthen walls etc ...
the more I think and the more I find assets in the concrete if it is used as inertia ...

Zen think what?

[dedeleco]

The earth and the stone have the same inertia.
Even the straw or the wood mixed with the earth have both the insulation and the inertia being perfectly ecological with the wooden frame of the methods of the middle age which had nothing to envy with our concrete which will not exist more in 400 years unlike those half-timbered half-timbered houses or Roman cement that still holds !!

complete thermal characteristics:
http://de.wikipedia.org/wiki/Temperatur ... %A4higkeit

[Alain G]

Hi Dede!

The ancients knew how to build the houses and the wood was not better except that it was denser because taken in bigger trees, today we build anywhere and often under the tablecloth or on soil too wet.

[Christophe]

The idea is not silly, but the material used is PES ... Not very econological ... Also, I was wondering if another material could be used?

It exists in compressed wood also + 1 layer of EPS

It's called Legnobloc: https://www.econologie.com/legnobloc-par ... -4334.html

https://www.econologie.com/forums/mur-en-bet ... 10487.html

Otherwise, AMHA, on the diagram, there is a big mistake: they are not mms but cms! No insulation insulates with an 8.7 R with only 45 mm !! It does not exist!

[dedeleco]

I said to myself weird these values ​​but without link on these blocks, impossible to check and even in cm it is weird (the R are not in the ratio of these thicknesses and the number of layers is not multiplicative report with the thicknesses that must be much higher !!) and even how are calculated the KWh / year, T outside and where ???

Everything is weird, and so the original link is needed and I have a sense of almost scam with arch-false numbers.

[Christophe]

No in cm it fits well! Very well even.

This makes a mean lambda on the 0.09 wall for the 25 cm and 0.05 for the 45 cm (logic is more insulation for the same non-insulating part). Which corresponds to lambda PSE 0.04 to 0.032.

Do the detailed calculation as needed.

In any case it's CM and not MM ...

ps: if the kWh / m².year are calculated with the same "error" ... I pity those who work with this company

[dedeleco]

I think it is 20cm plus layers in multiples of 5cm, 25cm is the lambda of 5cm of PSE and so on but then the values ​​are too optimistic for the 2,7 R to 25cm, more than double to less than the outside is also PSE 5cm, and 15cm concrete with PSE 10cm R ???? it is most likely !!

In my opinion the PSE outside is not useful for the outside plaster ???

In fact it is a blockwork formwork in PSE !!

[ojal]

The picture originally posted comes from this site: http://www.prodiscar.fr/isolation_exterieur.html

The manufacturer is EUROMAC2: http://www.euromac2.com/