Hi I live in a 1895 built terrace the walls being two course brick with no appreciable cavity (small gap filled with cement snots mostly). I want to remove my front window (standard sash) and replace it with a window of the same height but 24" wider. Can anyone give me an idea or drawing showing the lintel type I need in situ from a side elevation showing the brick course work in place. Not knowing the lintel shape needed I can't visualize the method of rebricking. Should the new UPVC windows be frame fixed then silicone beaded between frame and brick, then pointed with mastick?