Thermal joint for separating interior and exterior metal frame sections of aluminum windows

Abstract From the Canadian patent

A thermal sill joint for separating the sills of interior and exterior metallic window frames is disclosed. The thermal sill joint comprises a plastic hollow extrusion which is inserted between the two sills and sealed with sealing material. The extrusion and the two sills have inter-engageable upper and lower flanges. The lower flanges are inter-engageable by transverse downward movement of the extrusion relative to the sills, while the upper flanges are inter-engageable with a snap-action by moving the upper flanges of the sills towards the extrusion in a movement transverse to the latter. Paste-like material seals the joint between the interfitting upper flanges. It is possible to insert …