Abstract: Disclosed is a tool for removing air bubbles trapped between overlapping membrane layers. The tool includes a body about which is spaced a plurality of pressure rollers. The pressure rollers have axes of rotation generally perpendicular to an axis of rotation of the body. A drive shaft has a first end attached to the body and extends along the axis of rotation of the body. The second end of the drive shaft provides attachment to a rotating driving source. When pressure is applied to the drive shaft as the drive shaft is made to rotate, the pressure rollers simultaneously engage the surface of a membrane so as to sweep a circular path thereabout. A method of using the tool is also disclosed, wherein the tool is located adjacent a seam where the layers are overlaid and is translated along the seam as the tool is rotated.

Abstract: A roofing membrane securement system having an upper member and a lower member each of which is formed of a relatively hard, unyielding material. The lower member includes a bottom surface from which extends a preferably cylindrical wall. In one embodiment a plurality of ledges extend downwardly and inwardly from the upper edge of the inner surface of the circumferential wall. The upper member is preferably of circular shape, having a diameter less than that of the interior cross-sectional dimension of the cylindrical wall but greater than the distance between the innermost edges of circumferentially opposed ledges. In a second embodiment, ledges extend downwardly from the upper edge of the outer surface of the lower member circumferential wall, and the upper member has a downwardly extending wall adjacent the circumferential wall outer surface with ledges extending radially inwardly therefrom to engage beneath the lower member ledges.