The invention relates to a web-like or sheet-like semi-finished product capable of forming a polymeric foam composite material by heat treatment, which semi-finished product is formed by a web-like or sheet-like fibrous material and a mixture comprising curable resin and unexpanded thermoplastic particles of at least two different qualities with mutually different expansion temperature introduced into the fibrous material, wherein thermoplastic particles of at least one of said qualities remain unexpanded in the semi-finished product. The invention also relates to a polymeric foam composite material formed by such a semi-finished product. Furthermore, the invention relates to methods for producing such a semi-finished product and such a polymeric foam composite material.