Insulation injection device

A thermal insulation injection device configured to inject a thermal insulation precursor into a building cavity, the thermal insulation injection device comprising:

• an input port provided in a body of the thermal insulation injection device, the input port being configured to receive an insulation precursor from a precursor supply vessel;
• and
• a nozzle extending from the body, the nozzle being configured for insertion into a building cavity through a panel hole provided in a proximal panel of the building cavity, and for injecting the insulation precursor into the building cavity;
• the nozzle being configured to direct the thermal insulation precursor from the input port through a central passage of the nozzle and out through at least one dispensing port of the nozzle into the building cavity;
• the nozzle being cylindrical and having a substantially uniform circular cross-sectional shape and area extending along a longitudinal axis over a central region thereof from a proximal end thereof to a distal tapered region thereof, the distal tapered region being formed as an intersection of the cylindrical central region with a plane that is oblique to the longitudinal axis, the distal tapered region being thereby shaped as an ellipse formed in the oblique plane and terminated at a distal tip that is substantially aligned with an outer wall of the nozzle, the distal tip having a cross-sectional area.