BUILDING WATER PENETRATION PREVENTION STRUCTURE

To provide a building water penetration prevention structure capable of preventing water penetration into a building from waterproof sheets adhered to heat-insulating surface materials such as exterior wall insulation when flooding around the building due to inland flooding, and the like.SOLUTION: A building water penetration prevention structure 1 includes: a foundation 11 of a building; a base 12 fixed onto the foundation; multiple pillars 2 fixed onto the base 12; a crossbar 21 fixed onto the outdoor side of base 12; multiple pieces of exterior wall insulation 31 placed on the crossbar 21 across the outdoor side of the pillars 2; a base 12 fixed onto the foundation; multiple pillars 2 fixed onto the base 12; a crossbar 21 fixed to the outdoor side of the base 12; multiple pieces of exterior wall insulation 31 placed on the crossbar 21 across the outdoor side of the pillars 2; a breathable waterproof sheet 32 over the outdoor surface of the exterior wall insulation 31 and the outdoor surface of the crossbar 21; and an outdoor side elastic adhesive sealant 42 that is applied in an area from the lower edge of breathable waterproof sheet 32 to the outdoor surface of the crossbar 21, and in the lower area, the top of foundation 11 is also applied.SELECTED DRAWING: Figure 1 【課題】内水氾濫等による建物周囲の冠水に対して、外壁断熱材等の断熱面材の下端側からの浸水を抑制することができる建物浸水抑止構造を提供する。【解決手段】建物浸水抑止構造１は、建物の基礎１１と、基礎上に固定された土台１２と、土台１２上に固定された複数の柱２と、土台１２の屋外側に固定された横桟２１と、柱２の屋外側に渡って横桟２１上に配置された複数の外壁断熱材３１と、基礎上に固定された土台１２と、土台１２上に固定された複数の柱２と、土台１２の屋外側に固定された横桟２１と、柱２の屋外側に渡って横桟２１上に配置された複数の外壁断熱材３１と、外壁断熱材３１の屋外面および横桟２１の屋外面に渡る透湿防水シート３２と、透湿防水シート３２における下縁側から横桟２１の屋外面に至る領域に塗布されるとともに、下部領域が基礎１１の天端にも塗布された屋外側弾性接着シーリング剤４２と、を備える。【選択図】図１