Abstract: A waterproof-sheet type of roofing shingle comprises a belt-like tape attached to a bottom side of the roofing shingle facing a concrete slab. The belt-like tape has air passages for reducing a pressure of steam or vapor generated from concrete. The air passages are formed by projections or grooves and adapted to be in communication with air passages of an adjacent roofing shingle. The air passages are eventually in communication with an ambient atmosphere so as to vent the steam or vapor to the atmosphere, and therefore, bulging of waterproofing material is prevented from occurring.

Abstract: A waterproof-sheet type of roofing shingle comprises a belt-like tape attached to a bottom side of the roofing shingle facing a concrete slab. The belt-like tape has air passages for reducing a pressure of steam or vapor generated from concrete. The air passages are formed by projections or grooves and adapted to be in communication with air passages of an adjacent roofing shingle. The air passages are eventually in communication with an ambient atmosphere so as to vent the steam or vapor to the atmosphere, and therefore, bulging of waterproofing material is prevented from occurring.

Abstract: The present invention relates to a roofing shingle, which can surely prevent water such as rainwater from leaking through a roof. A roofing shingle has a rectangular plate (11) provided with first through fourth seam portions (11a-11d). The first and second seam portions (11a, 11b) are positioned in a pair along opposite side edges of said plate and folded in opposite directions with respect to a plane of said plate. The third and fourth seam portions (11c, 11d) are positioned in a pair along opposite end edges of said plate and folded in opposite directions with respect to the plane of said plate. The roofing shingle comprises a waterproofing sheet member (20) having a sheet (21) with its configuration greater than that of said plate and adhesive layers (22a, 22b) provided on both sides of the sheet.

Abstract: The present invention relates to a roofing shingle, which can surely prevent water such as rainwater from leaking through a roof. A roofing shingle has a rectangular plate (11) provided with first through fourth seam portions (11a-11d). The first and second seam portions (11a, 11b) are positioned in a pair along opposite side edges of said plate and folded in opposite directions with respect to a plane of said plate. The third and fourth seam portions (11c, 11d) are positioned in a pair along opposite end edges of said plate and folded in opposite directions with respect to the plane of said plate. The roofing shingle comprises a waterproofing sheet member (20) having a sheet (21) with its configuration greater than that of said plate and adhesive layers (22a, 22b) provided on both sides of the sheet.