IMITATION STONE COVERING BLOCK

PROBLEM TO BE SOLVED: To improve appearance by providing hidden joint grooves, disappearing into the bottom part of an imitation stone group, around the base part of the imitation stone group, and providing similar joints at the joint groove bottom parts between the imitation stones. SOLUTION: The side faces of base parts 2 are made collide with each other to lay a large number of covering blocks 1, and adjacent hidden joint grooves 4 are communicated with each other. The bottom face of the groove 4 between imitation stones 3 of the adjacent blocks 1 is therefore regressively visible so as to dissolve the state of the joint groove bottom face between the adjacent blocks being directly exposed to the bottom part of the imitation stone 3 to keep the joint groove 4 between the blocks 1 from being visible in a linearly grated state. Because of being communicated between the respective blocks, the grooves 4 act as a drain groove and an air groove so as to accelerate the drainage of rainwater on the covering face and to effectively prevent the temperature becoming high due to solar radiation heat. Furthermore, in the case of forming the groove 4 between the respective imitation stones, irregular outlines between the respective imitation stones 3 look prominent. Appearance can thereby be close to natural stones, drainage is improved, and the temperature is prevented from becoming high.