Flexible crack spread preventing, separable web-type joining material for joining a bearing face of a structure to a covering layer to be provided thereon, method for use of and covering layer construction formed with this material

摘要

Flexible crack spread preventing, separable web-type joining material for joining a bearing face of a structure to a covering layer to be provided thereon, method for use of and covering layer construction formed with this material. Crack spread preventing web (1) for joining a bearing face (2) of a structure to a rigid covering (3) to be provided thereon. The web comprises a lower fixing layer (5) of a fibrous web and an upper stretchable fixing layer (6) of a woven fabric or fibrous web separated by a thin flexible non adhering separating plastic foil layer (4). The upper (6) and lower layer (5) are joined to each other by breakable bridges (7) formed by needle punching extending through separating foil layer (4). The breaking strength between upper (6) and lower (5) layer is controlled by the number of bridges (7). In and for forming a covering layer construction the web (1) is placed on the bearing surface (2) and connected thereto by an adhesive penetrating into lower layer (5), the covering layer (3) is connected to the web (1) through an adhesive penetrating into the upper layer (6), said adhesives do not adhere to separating layer (4).