Abstract: A thermal insulation injection gun includes a pointed nozzle that prevents blocking of the nozzle by a distal panel of a building cavity and/or by pre-existing insulation within the cavity. In embodiments, the pointed nozzle can be pressed through a panel, thereby forming the injection hole. An enhancement port can be provided through which an enhancing material such as a carrier fluid, particulate or fibrous insulating material, a binder, or a fire retardant can be added and mixed with the insulating material. Embodiments include expanding nozzle wings that can compress pre-existing insulation to create a space on a proximal or distal side thereof for injecting the insulation. A compressible sheath installed over the nozzle can prevent dripping of excess insulation from the panel hole. Exchangeable collars can be used to fix an insertion depth of the nozzle and/or to block selected lateral dispensing ports of the nozzle.

Abstract: A thermal insulation injection gun includes a pointed nozzle that prevents blocking of the nozzle by a distal panel of a building cavity and/or by pre-existing insulation within the cavity. In embodiments, the pointed nozzle can be pressed through a panel, thereby forming the injection hole. An enhancement port can be provided through which an enhancing material such as a carrier fluid, particulate or fibrous insulating material, a binder, or a fire retardant can be added and mixed with the insulating material. Embodiments include expanding nozzle wings that can compress pre-existing insulation to create a space on a proximal or distal side thereof for injecting the insulation. A compressible sheath installed over the nozzle can prevent dripping of excess insulation from the panel hole. Exchangeable collars can be used to fix an insertion depth of the nozzle and/or to block selected lateral dispensing ports of the nozzle.

Abstract: A controller for a wall cavity insulation injection system monitors foam precursor dispensing from storage vessels, in embodiments via flow gauges and/or scales, and improves dispense volume accuracy and/or quality by providing audible, verbal information to the operator, enabling injection of high expansion foams without wall blowout. Embodiments verbally up-count or down-count elapsed time, dispensed quantities, and/or filled volumes to enable dispensing without cavity volume input. Other embodiments accept cavity volume input and down-count to a required time, quantity or volume. Bar codes, QR codes, etc. can be associated with wall cavities and/or precursor vessels and scanned to input information. Embodiments monitor precursor dispense ratios and/or precursor vessel contents, and prevent further dispensing upon detection of an error condition to avoid off-ratio dispensing and system contamination by air due to an empty precursor vessel.