Unit comprising a formwork board including a housing and a repairing element suitable for being fixed to the housing, and repairing method of a formwork board

An assembly comprising:

• a board having a surface and a housing that extends partially into the board, the housing having an opening at the surface of the board, the housing including a bottom wall, a side wall and a first height dimension as measured between the bottom wall of the housing and the surface of the board;
• and
• a repairing element located inside the housing, the repairing element including:
• a first member made of a thermoplastic material having a top surface,
• a second member made of a porous material onto which the first member is supported, the thermoplastic material of the first member being a different material than the porous material of the second member, the second member having a base, the first and second members having a combined second height dimension as measured between the base of the second member and the top surface of the first member, the second height dimension being greater than the first height dimension such that the first member at least partially extends above the surface of the board, the second member including pores that enhance the second member's ability to be bonded to the bottom wall of the housing, the second member dimensioned such that a cavity exists between the side wall of the housing and at least a portion of the repairing element, the first member having a volume sufficient to fill the cavity upon the first member being melted.