by mikesmith999 »
Tue Sep 25, 2007 4:37 pm
You can screw the frames together using self tapping screws. Put a mullion or "joining profile" between the windows, this can be a upvc box with internal steel reinforcement, that is slightly deeper than the frame section between so the outer sections can butt the box rather than each other. Mullion should be the same height as the windows.