A method and apparatus for installing backing in walls which include a first, second and third upright U-shaped stud. A first backing member has a first end, a second end, a top, a bottom, a first side and a second side. The first backing member is disposed between the first and second studs. A second backing member has a first end, a second end, a top, a bottom, a first side and a second side. The second backing member is disposed between said second and third studs. A hinge is operatively attached to the first side of the first and second backing members for permitting the second backing member to pivot with respect the first backing member between a first position wherein the first side of each of the first and second backing members are substantially in the same plane and a second position whereby the first and second backing members are not in the same plane. This permits the first backing member to be placed between a first and second adjacent vertical stud. Then the second backing member is pivoted with respect to the first backing member. After that, the second backing member is pivoted to a position to be disposed between the second vertical stud and the third stud which is adjacent to said second stud, whereby the second end of the first backing member is adjacent to and on one side of the first stud and the first end of the second backing member is adjacent to and on the other side of the first stud. More than two backing members can be tied together with a hinge if desired.