siding installation apparatuses and methods for engaging a first siding piece and supporting a second siding piece are disclosed herein . in one embodiment , the apparatus includes a support member having a support surface to support the second siding piece , an engagement member projecting from the support member , and a securing assembly coupled to the support member to releasably restrict the support member from moving relative to the first siding piece . the engagement member is configured to engage the bottom portion of the first siding piece by contacting the back surface . it is emphasized that this abstract is provided to comply with the rules requiring an abstract . it is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims . 37 c . f . r . § 1 . 72 .