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truss roof for one and a half storey dormer

  • 06-06-2014 08:02PM
    #1
    blacktea
    Registered Users, Registered Users 2 Posts: 81 ✭✭


    Hi all,

    would be grateful if i could pick your brains on this. Just wondering if anyone has experiences of a trussed roof on a one and a half storey dwelling? Not looking for structural advice but are they possible and are they a good option as opposed to cut roofs. Will be contacting companies next week but looking for some unbiased opinion. few dormer windows will be required to be tied in as part of truss. Any opinions appreciated. Many thanks in advance


Comments

  • #2
    genuine leather
    Registered Users, Registered Users 2 Posts: 370 ✭✭genuine leather


    Hey blacktea.
    The truss roof for the story and a half works well. They will have quite a higher spec(larger timbers) than your standard truss because of that style of roof.There would be more work/detail involved if you were to use a cut roof construction,but costings may be comparable in the end when everything is taken into account.

    You mentioned there will be some dormers. If they are both to the front and rear of the roof, have a look to see how they line up front to back/or all offset on your first floor drawings. This can create different design scenarios/structure etc.

    If i am to offer advice(not structurally)
    The dormer windows will create gaps in your wall plate, so getting your wallplate lines perfectly straight,level and parallel(fixed home with engineers detail) will give these very large and heavy trusses a good roof line .
    A crane on site for a day to lift trusses also a must.
    All in i think truss is a good choice for your roof type


  • #3
    blacktea
    Registered Users, Registered Users 2 Posts: 81 ✭✭blacktea


    genuine leather wrote: »
    Hey blacktea.
    The truss roof for the story and a half works well. They will have quite a higher spec(larger timbers) than your standard truss because of that style of roof.There would be more work/detail involved if you were to use a cut roof construction,but costings may be comparable in the end when everything is taken into account.

    You mentioned there will be some dormers. If they are both to the front and rear of the roof, have a look to see how they line up front to back/or all offset on your first floor drawings. This can create different design scenarios/structure etc.

    If i am to offer advice(not structurally)
    The dormer windows will create gaps in your wall plate, so getting your wallplate lines perfectly straight,level and parallel(fixed home with engineers detail) will give these very large and heavy trusses a good roof line .
    A crane on site for a day to lift trusses also a must.
    All in i think truss is a good choice for your roof type

    thanks for that genuine leather, very useful insight.

    i would have a preference for prefab truss as it would cut out a large area of blockwork that would support rsj's for a cut roof and also the steel itself. Other benefits i see would be the design left in the hands of the manufacturer (in a self build). ultimately it would add flexibility to the build which is most welcome. Time to look into it further next week.

    thanks again, blacktea


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