Abstract: A device for welding roof membranes which includes a heat welding means capable of applying a heat weld to overlapping roof membranes, and a fluid application means capable of applying a solvent or primer between overlapping roof membranes in order to form a solvent weld to the roof membranes or to aid in preparing the membranes for application of a heat weld to the membranes. The device may be employed to apply, for example, a heat weld to overlapping roof membranes on one side of a fastening means, and a solvent weld to the overlapping roof membranes on the opposite side of the fastening means. Such a device enables one to apply solvent or primer safely while providing the ability to apply, if desired, a heat weld in addition to the application solvent or primer.

Abstract: An anchor assembly capable of being inserted in a hole in a substrate. The assembly includes a sleeve and a screw. The sleeve includes a top end, a body portion, and a bottom end. The sleeve includes at least one feeler prong adjacent the top end, and preferably a tip portion adjacent the bottom end. The anchor assembly may be inserted into a hole in the substrate. The feeler prong(s) enable the installer to known whether the sleeve has been inserted properly into the hole, and the tip serves to push dust away from the bottom of a hole to insure optimum penetration of the sleeve into the hole, as well as insuring full penetration of the screw into the sleeve.

Abstract: A method of inserting a rivet having at least a body portion and a mandrel having means for cutting and peeling back the rivet into portions which curl back on the rivet body into a solid substance. The rivet and mandrel are inserted into the solid substance without completely piercing through the solid substance. The rivet is then cut and peeled back into portions which curl back on the rivet body within the solid substance. The invention is also directed to a product comprising a solid substance, and a material fastened to the solid substance by at least one rivet which extends through the at least one material and into the substance without completely piercing through the substance. The at least one rivet has been cut back into portions which curl back on the rivet body, thereby attaching the material to the solid substance.

Abstract: A stress plate for clamping a membrane to a roof deck wherein the plate includes gripping prongs which grip the membrane, preferably without piercing of the membrane.

Abstract: A rivet having a head portion and a body portion, with a bore through the head portion and body portion, said bore being capable of receiving a mandrel having a head portion with a self-piercing end portion and a cutting portion. The self-piercing end portion is capable of piercing partially or entirely through a roofing substrate. After the mandrel has pierced the substrate, the cutting portion of the mandrel peels back the rivet body into separate portions which curl back on the rivet body.