Depe… But addition of more cement can affect the permeability of the walls. S tructural I nsulated R ammed E arth. Their density also make them perfect to block sound. While 500mm thick walls can still be constructed if desired, with or without cement, most modern rammed earth walls in Australia are built using cement as a stabiliser and are typically 300mm thick for external walls and 300mm or 200mm for internal walls. And, for a non-load bearing walls is 200mm. SIREWALL, is a structural sandwich wall system typically 20″ to 24″ thick. Thickness can be determined based on what they’re needed for. Below is a table detailing the minimum thickness and insulation – R ratings for rammed earth, structural and non-structural. Indeed, properly constructed rammed earth endures for thousands of years, a… Thestandard thickness of rammed earth walls is generally 300mm. walls can beconstructed to alternative thickness as required by the project. Foundation strips in rammed earth should be at least as thick as the wall above, and otherwise have the dimensions in Table 1. As little as 15cm all the way up to 61cm for something load bearing. If you’re into a natual look, this is the way to go. SADCSTAN TC 1/SC 5/CD SAZS 724 4 TABLE 1 – MINIMUM WIDTH OF STRIP FOUNDATIONS IN RAMMED EARTH These are minimums to achieve R ratings. Insulated stabilised earth (ISE) For eg., a 300mm thick rammed earth wall will take 8-9 hours for heat to transfer through the wall to the other side. HIGH THERMAL MASS Our energy efficient rammed earth walls of minimum 30 cm thickness provides great protection from extremes in climates. Well produced cement stabilised rammed earth walls can be anywhere between 5 to 20 MPa. The minimum structural thickness for load-bearing earth wall is 250mm. They are ideal for internal walling or external walling that does not require a high R-value. The walls collect heat from the sun during daylight hours and release the warmth during the night, when the outside temperature sinks, which makes for a very slow heat/cold penetration. The compressive strengthof rammed earth is dictated by factors such as soil type, particle size distribution, amount of compaction, moisture content of the mix and type/amount of stabiliser used. These rammed earth walls can be anywhere from 200mm to 1000mm thick going up in 100mm increments. Rammed-earth walls have the colour and texture of natural earth. Higher compressive strength might require more cement. Local soils combined with 9% cement are compacted on either side of a hidden insulation core. These walls have a high thermal mass. In instances whereniches and recesses are required for fireplaces, heater boxes etc.
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