There’s a wide range of earthbag building systems and some are obviously better than others. Let’s summarize the leading V.G.E.W. contenders. Links are included to make it easier to research the details.
– Eternally Solar’s earthbag walls filled with sand. Engineering tests show they exceed building code requirements
– Eternally Solar’s earthbags can be filled with various materials for optimum performance. For instance, 1. insulation in outer tube, 2. clayey subsoil in the center, 3. sand in the inside tube for thermal mass.
– Another variation (one of many) for Eternally Solar’s earthbags to build insulated houses: 1. scoria, pumice or perlite in outer tube, 2. clayey subsoil mixed with scoria, pumice or perlite in the center, 3. sand in the inside tube for thermal mass.
– Hyperadobe: mesh tubes (or bags if tubes aren’t available) filled with subsoil, road base or other suitable material.
– Polypropylene bags or tubes filled with subsoil, road base or other suitable material.
– Poly bags filled with insulation such as scoria or pumice, as pioneered by Kelly Hart, to build superinsulated earthbag houses in cold climates.
– Hyper-wattle tubes filled with lightweight insulating materials as pioneered by Patti Stouter. Narrow walls like this use fewer materials and take up less space.
– Earthbags stabilized with lime, cement, caliche, gypsum, Alker Technology, PolyPavement or the equipvalent, MICP
– Geopolymer as pioneered by Professor Joseph Davidovits turns simple natural materials to stone
– Reinforced earthbags as pioneered by Precision Structural Engineering, Inc. This system meets all building codes in seismic and non-seismic areas.