Calling all "rammed earth" experts...
The main innovations with "SIREWall" seem to be the inclusion of rigid foam insulation in a manner that appears similar to a Thermomass foundation and higher compressive strength than more traditional rammed earth techniques.
The performance/durability advantages as I seem them are:
Rammed earth is "airtight".
There is no "interstitial" space - ie: no 3D network.
There is (possibly continuous?) R value.
There is built in thermal mass for decrement delay.
The earth may be hygroscopic (moisture buffering) but not sensitive to moisture damage.
The walls may be very long lasting.
But what about disadvantages?
SIREWall is apparently a proprietary technique, ie: specific details are behind a paywall.
Can the wall be engineered so that the insulation is continous throughout or are there (ie: top of wall) significant thermal bridges?
Thermomass foundations use fibreglass ties to connect the concrete through the rigid foam but I don't see anything like that in the details at the SIREWall site...
Traditional rammed earth can be quite "buildable", but I wonder if this is still the case when you try to do something like "SIREWall"...
How does one normally install wiring and plumbing in a rammed earth wall?
Posted Feb 18, 2012 9:55 PM ET
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