Unlike bermed designs, an underground home's roof and outer walls are all completely covered. This allows for maximum insulation and energy efficiency. These homes also offer superior sound proofing, privacy and protection from high winds. But subterranean homes tend to have more issues with water leakage than other types of homes. Steel reinforced concrete is typically best suited for underground construction. insulated concrete forms
(ICFs) are commonly used for these types of structures. High efficiency drainage systems are also a must. Where to build is also an important consideration. Flat land with high water tables is certainly not the ideal location. a hillside with a reasonably steep slope is ideal. Although less common, underground homes can sometimes be built into a solid stone hill or mountainside. Referred to as
cave constructed homes, this type of venture is more risky and expensive than a typical underground home. This is due to extensive blasting and increased safety precautions.