light straw clay in the hyperadobe mesh tubing to form a layer 200 mm (8") thick outside of a dome. Thermal mass properties of earthen fill moderate temperature swings in climates that experience high temperature fluctuations from night to day. This thermal flywheel effect makes massive earth walls ideal for mild or hot and dry climates. Clay or sand also have excellent heat retention characteristics and, when properly insulated from the home's exterior, can serve as thermal mass in a passive solar building design in cool climates, keeping interior temperatures stable year-round. Reinforcement and structural performance Solid CE may be built with less barbed wire in low-risk areas because walls solidify between courses. Earthbag using woven bags or tubes need barbed wire for any level of natural hazard since the bag-to-bag surfaces are slippery. Pins between courses do not contribute important linear out-of-plane strength. Walls of earthbag with barbed wire are more flexible than adobe and may resist collapse when carefully detailed. Earthbag of weak soil with no steel can be half the shear strength of unreinforced adobe, which is easily damaged in earthquakes. New Zealand's code detailing and plans allow unreinforced adobe walls to survive almost 0.6 g forces (comparable to Ss values for 2% probability of excedance in 50 years), but earthbag needs stronger soil to match this strength. Earthbag in Nepal surpassed this strength slightly by resisting forces above 0.7 g in early 2015. Domes tested in California resisted approximately 1 g forces, due to the stable shape of these less than diameter buildings. Current earthbag techniques of inserting rebar unattached to base and overlapping without connection may only resist 1.2 g or less, even if using very strong soil. Special reinforcement is needed Solid CE of strong soil has higher shear and out of plane strength than modular CE,. It may also allow the use of mesh for horizontal reinforcement in addition to or in place of barbed wire. Contained gravel or contained sand may perform best with wire wrapped around the sides of straight wall sections, alternating with the next course having barbed wire gift-wrapped under and over the same straight sections. Base walls of CG in high risk regions may need additional buttresses at the foundation level where builders cannot afford a reinforced concrete (RC) grade beam or footing. A narrower plastic mesh tube often used for erosion control wattle could be filled with