I hope to remove a wall between two rooms in a 1983 extension to my 1930s bungalow in Glasgow, Scotland. The extension is brick built cavity wall, the dividing wall is brick single skin, the rooms are 3.5m x 3.2m, and 2.7m x 3.2m, so the resulting single room will be about 5.2m x 3.2m. The roof of the extension is a flat roof which was resurfaced in Seamless Roofing glass fibre 16 years ago. I wonder if I should be expecting to need a steel joist to support the roof where the wall is removed? The ceiling void will not be accessible until the existing ceiling is broken through, but from memory, I think the ceiling joists run in the same direction as the dividing wall, between the original bungalow external wall (now internal) and the back elevation wall of the extension.
