Pitched roof combined with a flat roof top

Discussion in 'Carpenters' Talk' started by davis davis, Oct 7, 2010.

  1. davis davis

    davis davis New Member


    Im in the process of designing my extension, currently i have a rectanglular house with a pitched roof with the ridge running front to back.

    Now im looking to install build a two story extension directly to the right of the house.

    Now if i was simply going out from a point, ie at right angles to the ridge i could come stright out, the problem occurs that i am going the full lenght of the existing property.

    Therefore i was wondering if any one knew it you could have a pitched roof with a flat top. I suppose its on the same basis as a dorma except it has pitched sides.

    Any help would be great!

  2. -chippy_john

    -chippy_john New Member

    Why would you want to put a flat roof on it?

    What's wrong with two new hips running from the corners of your new extension and a new ridge meeting the old one at the centre?
  3. saddle joint

    saddle joint New Member

    I think what you mean is a gambrel roof.

    It would be, in my view, virtually impossible to place a flat roof on a pitched roof in the way you describe. The reason being that water would penetrate on the verges where the pitch met the flat roof.

    A gambrel roof is a roof that has a pitch beginning at a steepish pitch perhaps 45' and then about 2/3rds up it becomes a shallower pitch say 20'.

    The advantage of this type of roof is that it gives a lower profile where height may be a problem from a planning point of view. It also gives a very good usable area in a roof for conversion into living space.

    I hope this is of some use.

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