A method of installing a window and composite window bracket comprises a first member and a second member, and an at least one accessory member to couple the composite window bracket to at least one accessory bracket. The first member includes a first surface extending from a first end of the first member to a second end of the first member, and a second surface extending from the first end first member to the second end first member, the first surface of the first member to be coupled to a support beam. The second member supports a window disposed on the first surface of the second member.