Abstract: A floor mold slab 3 of reinforced concrete is uniformly assembled above sleeve crowns of underground beams 12 of mat foundations 1 of reinforced concrete, and underground beam piercing pipes 43, whose length is identical to a width of the underground beam 12, both pipe ends thereof being provided with connecting portions 433 for joints, are embedded and fixed within the underground beam 12 at the time of installing concrete for the mat foundations 1, and pipes 4 that are used for guiding plumbing for water, gas or other fluids or electric wiring cables are respectively connected to both pipe ends while the pipes 4 are extended indoor and outdoor. With this arrangement, concrete closely fits to the periphery of the underground beam piercing pipes 43 so that termites can be prevented from entering an underfloor portion 5 of a building from piping portions piercing through the underground beams 12.

Abstract: An indoor space is externally enclosed and thermally insulated by an underfloor insulating layer, a wall insulating layer and a ceiling insulating layer. An underfloor ventilation layer is defined between a floor and the underfloor insulating layer, and a ceiling ventilation layer is formed between a ceiling and the ceiling insulating layer. Communication is established through the underfloor ventilation layer, the indoor space and the ceiling ventilation layer, via floor vents and ceiling vents. Outdoor air is drawn into the indoor space from an air intake. Air is expelled from the ceiling ventilation layer into an underroof space by ventilation fans and then discharged outdoors from underroof outlets. A heat exchange ventilator is disposed in the ceiling ventilation layer, whereby heat exchange takes place between air in the ceiling ventilation layer and incoming fresh outdoor air. After the heat exchange, the incoming air is delivered into the underfloor ventilation layer.

Abstract: A termite shielding structure of underfloor portions of a building wherein a floor mold slab 3 and a berm 31 of reinforced concrete are integrally formed on sleeve crowns of underground beams 12 of mat foundations 1 made of reinforced concrete, wherein a termite shielding chemicals bucket 7 which is a long cylindrical body whose interior is filled with termite shielding chemicals is embedded into the floor mold slab 3 so as to pierce therethrough in a vertical manner, and wherein a pipe 4 that is used for delivery of plumbing water, gas or other fluids or for guiding electric wiring cables 5 is connected to the termite shielding chemicals bucket 7 such that these respectively extend on both upper and lower sides of the floor mold slab 3. With this arrangement, termites can be prevented from entering the underfloor portion 6 of the building from piping portions piercing through the floor mold slab 3.