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Lean to extension

  • 14-09-2010 12:56pm
    #1
    gabbo is coming
    Registered Users, Registered Users 2 Posts: 999 ✭✭✭


    Hello,

    Am planning to build a lean to extension. I want to continue the existing concrete tile roof. Roof is 11ft high. I plan to go out 12 feet, to a height of 8 ft.

    Am I right in saying that this is 3/12 - or 14 degrees. Is this pitch too shallow for a concrete tiled roof?


Comments

  • #2
    Poor Uncle Tom
    Registered Users, Registered Users 2 Posts: 14,547 ✭✭✭✭Poor Uncle Tom


    14 degrees is right, but it is too shallow. Unless you seal the roof underneath and put the tiles on for appearence sake.


  • #3
    gabbo is coming
    Registered Users, Registered Users 2 Posts: 999 ✭✭✭gabbo is coming


    Poor Uncle Tom wrote: »
    14 degrees is right, but it is too shallow. Unless you seal the roof underneath and put the tiles on for appearence sake.

    Thanks.

    Now I'm in a quandry. I want to build a 28ft wide extension, going out 12 ft.

    Original idea was to extend existing roof in a lean to. However, this sounds like a non runner. As I see it - options are:

    1. Flat fibreglass roof. Good for 30 yrs. Put in Velux frames for light.

    2. Put in a valley between existing roof and rise to a perpendicular apex maybe 8 feet long, but this would mean the veluxs would be on the east and west sides of the apex rather than the south as was original idea.
    (I can't build the new roof in to the existing in a perpendicular arrangement as there is a dormer window coming out of the existing roof, so there has to be a valley in the middle.)

    3.Put in a valley between existing roof and rise to a *parallel apex*, 28 feet wide, thus allowing light to come in from the south side.


    Anyone any opinions on which would be the best solution - for light, asthetics, insulation, etc?

    I will probably continue the ceiling inside the house at 8 ft, so I'm not too concerned with having the inside ceiling as a feature....


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