These U Frame Glazing Packers are designed for use during the installation of the window frame into the window opening.Their function is to prevent the deflection of the frame during the installation, increase security around the fixing point and support the frame so it can be installed plumb (vertical). The “U”shaped design allows for a packer to be installed around the fixing and supporting the fixing point.
Once installed correctly with the fixings the frame is then square so that the insulated glazed unit can be installed.