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?

  • Alasdair Macmillan

    Many older, larger buildings (Victorian terraces for example) have flat roof sections, well hidden from the street. There is no problem technically with a flat roof (other than the usual ones of condensation and waterproofing, all addressable if properly detailed by an Architectural Technologist), but the initial obstacle you’ll have to overcome will be your local planning department – flat roofs, if visible, are unattractive. Design it sensitively (perhaps a hip in that corner to reduce the impact of the flat roof silhouette – give the flat roof line the appearance of a ridge) and you’ll be off to a flying start!

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