A method and system for installing shakes on a building comprising a ledge r board and a shake jig for assisting with installation of shakes. The shake j ig comprising a base member supporting an adjustable member with a releasably fastener facilitating releaseable retention of the adjustable member in a desired relative positio n with respect to the base member. The base member has a shake shelf for abutting against a surface of a shake to prevent further insertion of the base member, betwee n an installed topmost shake and an at least partially overlapped shake, and facilitate desired alignment of the shake jig with respect to the installed topmost shake. The adjustable member has a ledger shelf for engaging with the ledger board and retaining the ledger board in a desired horizontal orientation with respect to the sha ke shelf and assisting with installation of shakes.
