Patent ID: 8479474

Claim:
A shingle installation device to attach shingles to a surface comprising: a body having a first surface opposite a second surface; a positioning stop having a longitudinal extent along said body to align an edge of a shingle to be installed; an alignment stop extending from said second surface configured to be positioned against an installed shingle, said positioning stop and said alignment stop being parallely spaced at a predetermined distance from each other, wherein said alignment stop includes an edge provided by at least one alignment spacer attached to said second surface of said body; a retainer extending from said positioning stop, said retainer spaced from said second surface of said body to form a gap to retain the edge of the shingle to be installed; and at least one first elongated viewing port extending along a longitudinal axis, said longitudinal axis of said viewing port in parallel alignment with said longitudinal extent of said positioning stop and disposed through said retainer to view the bottom edge of the shingle retained within said gap as it is placed against said positioning stop; wherein said body includes at least one second viewing port disposed therethrough, said at least one second viewing port having an edge in alignment with said edge of said alignment stop.