Earth Sheltered Housing

above-grade allow architectural backfilling beam bentonite bermed Building Code ceiling chapter clay climate Column construction contractor conventional roof cost cracks degrees F direct gain DRAIN TILE earth sheltered home earth sheltered structures efficient energy engineering expansive clay exterior walls feet Figure free drainage glazing grade gravel heat exchanger heat loss heating and cooling humidity inches increase infiltration insulation interior landscape layer living area materials Mean Month Day minimum moisture Month Day Temp natural needed overhang passive solar plants protection radiation radon retaining walls Roof Wall Floor shade shear walls slab slope soil pressure solar gain space storage summer surface TABLE 11.5 Continued temperature thermal break Thermal comfort thermal mass tion trees Trombe wall underground VAPOR BARRIER vegetation ventilation Wall Floor Max water table waterproofing wind winter wood