A machine for welding an overlapped region of two adjacent strips of material and a method of using the same. The machine includes a housing with front and rear ends, a wheel train engaged with the housing for moving the housing across the material; a nozzle on the housing having a welding head at a free end; the nozzle being positionable at least partially beneath the housing's bottom wall for welding the overlapped region; front and rear pressure rollers engaged with the housing, where the front roller is positioned forwardly of the welding head and the rear roller is positioned rearwardly of the welding head; wherein the rear pressure roller applies pressure to the overlapped region when the wheel train moves the housing in a forward direction; and the front pressure roller applies pressure to the overlapped region when the wheel train moves the housing in a reverse direction.

A roof assembly comprising: a roof deck; a thermoplastic membrane covering the deck; and a fabric having disposed thereon expandable graphite.

An induction board for use in a roof system. The induction board includes a base and an adhesive covering the base or a portion of the base. Metal wire which may in the form of a metal wire mesh, is coated with the adhesive and disposed over the base. The metal wire may be used as a susceptor in an induction heating process. The roof system also includes a roof deck on top of which the induction board is secured and a membrane over the induction board. The adhesive activates with the addition of heat created during the induction heating process to adhere all or part of the membrane with the induction board.

A roofing system having at least one underlayment layer; at least two nail fasteners attached to the at least one underlayment layer and into the roof deck, wherein the head of each of the nail fasteners is above the at underlayment layer and the shaft is driven through the underlayment layer and into the roof deck; at least one bead of adhesive applied above the underlayment layer; and at least one metal roofing panels placed on the at least one bead of adhesive applied above the underlayment layer, wherein the at least one metal roofing panels are above the at least two nail fasteners and the at least two nail fasteners do not penetrate the at least one metal roofing panels.

An induction heating tool that holds voltage or current supplied to the induction tank circuit constant and tracks changes in the other of voltage or current during each induction heating cycle. The disclosed induction heating tool exploits the fact that the resistance an attachment plate increases along with the temperature of the attachment plate. During an induction heating cycle, the attachment plate is magnetically coupled to a work coil and the resistance of the attachment plate is reflected to the circuit. Changes in the resistance of the attachment plate alter the pattern of energy delivery from the work coil to the attachment plate in a predictable way. Calculations accurately predict the temperature of the attachment plate over a wide variety of ambient conditions, including the presence of moisture at the membrane/attachment plate interface. The disclosed induction heating tool produces consistent results without calibration for ambient conditions.

A machine for welding an overlapped region of two adjacent strips of material and a method of using the same. The machine includes a housing with front and rear ends, a wheel train engaged with the housing for moving the housing across the material; a nozzle on the housing having a welding head at a free end; the nozzle being positionable at least partially beneath the housing's bottom wall for welding the overlapped region; front and rear pressure rollers engaged with the housing, where the front roller is positioned forwardly of the welding head and the rear roller is positioned rearwardly of the welding head; wherein the rear pressure roller applies pressure to the overlapped region when the wheel train moves the housing in a forward direction; and the front pressure roller applies pressure to the overlapped region when the wheel train moves the housing in a reverse direction.

Embodiments of the invention provide composite roofing strips that may be attached to a roofing membrane for aesthetic and/or functional purposes and method of attaching the same. According to one embodiment, a composite roofing strip may include a longitudinally extending body having a base and a lateral member extending from the base, and may also include an insert extending partially or fully along the body and coupled therewith. The insert may be formable so as to allow the composite roofing strip to be adjusted to have a desired profile and to maintain the desired profile of the composite roofing strip post adjustment.

A roofing system may include a first ethylene propylene diene terpolymer (EPDM) roofing membrane having a first lap. The roofing system may include a second EPDM roofing membrane having a second lap that overlaps at least a portion of the first lap of the first roofing membrane. The roofing system may include a thermoplastic film positioned between the first lap and the second lap. The thermoplastic film may bond the first lap and the second lap together.

An induction heating tool that holds voltage or current supplied to the induction tank circuit constant and tracks changes in the other of voltage or current during each induction heating cycle. The disclosed induction heating tool exploits the fact that the resistance an attachment plate increases along with the temperature of the attachment plate. During an induction heating cycle, the attachment plate is magnetically coupled to a work coil and the resistance of the attachment plate is reflected to the circuit. Changes in the resistance of the attachment plate alter the pattern of energy delivery from the work coil to the attachment plate in a predictable way. Calculations accurately predict the temperature of the attachment plate over a wide variety of ambient conditions, including the presence of moisture at the membrane/attachment plate interface. The disclosed induction heating tool produces consistent results without calibration for ambient conditions.

A wheeled carrier for a device for thermowelding a bituminous membrane to a target surface to transport the device from a first location to a location different from the first location before, during, or after the membrane installation process.