We have a small bungalow which is L-shaped – mainly one room deep, with one extra bedroom and bathroom in the L-shape. The roof is duo-pitch in the main, with the L-shape at the back has a gable end. We want to box off the house so that is a rectangle and convert the loft and the new roofspace. My question is about the shape of the roof – the most space upstairs would come from extending from the ridge with a flat roof and then coming back down again with the same pitch as on the front. Is this a normal shape for a roof? I don’t think i have ever seen a house with a roof that shape? Can anyone see any problems with that?