A method for constructing a composite structural wall, the method comprising: adjacently arranging a first pair of prefabricated construction modules which provide a first pair of wall panels (100, 200), wherein each wall panel (100, 200) of the first pair of wall panels (100, 200) includes: a first panel body (101, 201) having a first width (w 1), a first length (l 1), a first height, and a first surface defined by the first length (l 1) and the first height wherein the first length (l 1) and the first height have larger dimensions than the first width (w 1); and at least one first guide (105, 205) attached to the first panel body (101, 201), wherein adjacently arranging the first pair of prefabricated construction modules includes adjacently arranging the first pair of wall panels (100, 200), dispensing a first grout into a first gap between the first pair of wall panels (100, 200); and curing the first grout to join the first pair of prefabricated construction modules, wherein curing the first grout includes joining the first surfaces of the first pair of wall panels (100, 200) to form a first composite structural wall having a width at least twice the first width (w 1) of the first panel body (101, 201), characterised in that the at least one first guide (105, 205) is protruding from a first groove (110, 210) formed in the first surface, adjacently arranging the first pair of prefabricated construction modules includes overlapping the first guides (105, 205) of the first pair of wall panels (100, 200) to form a first channel; inserting a first linking rod into the first channel; wherein dispensing the first grout into the first gap includes dispensing the first grout into the first channel; and wherein a width of the first grout between the non-grooved portions of the first surfaces of the first pair of wall panels (100, 200) is smaller than the first width (w 1) of the first panel body (101, 201). adjacently arranging a first pair of prefabricated construction modules which provide a first pair of wall panels (100, 200), wherein each wall panel (100, 200) of the first pair of wall panels (100, 200) includes: a first panel body (101, 201) having a first width (w 1), a first length (l 1), a first height, and a first surface defined by the first length (l 1) and the first height wherein the first length (l 1) and the first height have larger dimensions than the first width (w 1); and at least one first guide (105, 205) attached to the first panel body (101, 201), a first panel body (101, 201) having a first width (w 1), a first length (l 1), a first height, and a first surface defined by the first length (l 1) and the first height wherein the first length (l 1) and the first height have larger dimensions than the first width (w 1); and at least one first guide (105, 205) attached to the first panel body (101, 201), wherein adjacently arranging the first pair of prefabricated construction modules includes adjacently arranging the first pair of wall panels (100, 200), dispensing a first grout into a first gap between the first pair of wall panels (100, 200); and curing the first grout to join the first pair of prefabricated construction modules, wherein curing the first grout includes joining the first surfaces of the first pair of wall panels (100, 200) to form a first composite structural wall having a width at least twice the first width (w 1) of the first panel body (101, 201), characterised in that the at least one first guide (105, 205) is protruding from a first groove (110, 210) formed in the first surface, adjacently arranging the first pair of prefabricated construction modules includes overlapping the first guides (105, 205) of the first pair of wall panels (100, 200) to form a first channel; inserting a first linking rod into the first channel; wherein dispensing the first grout into the first gap includes dispensing the first grout into the first channel; and wherein a width of the first grout between the non-grooved portions of the first surfaces of the first pair of wall panels (100, 200) is smaller than the first width (w 1) of the first panel body (101, 201).