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Tile for a roof with 15 Degree pitch angle?

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  • 08-05-2005 1:04pm
    #1
    pauln
    Registered Users Posts: 366 ✭✭


    Does anyone know what tile sold in this country can be used on a house roof with a 15 degree pitch angle?
    It's a monopitch roof, if that makes any difference to the choice.

    The tile would have to be available in a blue/black slate colour finish also.

    Thanks.


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    #2
    Carpenter
    Registered Users Posts: 2,683 ✭✭✭Carpenter


    norsman sheeting is the only way to go


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    #3
    kadman
    Moderators, Home & Garden Moderators Posts: 5,069 Mod ✭✭✭✭kadman


    pauln wrote:
    Does anyone know what tile sold in this country can be used on a house roof with a 15 degree pitch angle?
    It's a monopitch roof, if that makes any difference to the choice.

    The tile would have to be available in a blue/black slate colour finish also.

    Thanks.

    Hi Pauln,

    Thats a very low pitch indeed, although there are tiles available to suit that pitch.

    http://www.marleyroofing.co.uk/content/14.chtml

    The data sheet for these low pitch tiles or similar, need to be adhered to. Company specifications may advise doubling the layer of felting or reinforced membrane, at this low pitch. which is good practice. Good ventilating tiles and preserved battens, need to ensure good airflow here, because low pitch roofs that may allow some moisture to blow up under the tiles, do not readily dry out as well as higher pitch roofs, where gravity helps as well.

    Rooferpete will no doubt give you the best advice, or ( Rookad ) if you can afford them. Hey Rooferpete. he he

    kadman


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    #4
    rooferPete
    Registered Users Posts: 1,497 ✭✭✭rooferPete


    Hi,

    Tile sheets have a big minus that is soon to be revealed as they start failing.

    Concrete tiles even at 17 1/2 degrees must be part of a low slope system, the Marley systems are usually designed for the UK market and while we have a lot in common the way they roof over there is different to here.

    The system I recommend for low slopes here is MetroTile Shingle product, it is metal but the fixings are not exposed.


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    #5
    pauln
    Registered Users Posts: 366 ✭✭pauln


    That's great guys thanks. Does anyone know off hand what the marley or metrotile work out at for a square meter say and who distributes them in Ireland?

    @Rooferpete, You mentioned that the marley was more a UK product. Our roofer mentioned that he knew of the marley product already but I'm not sure he has used it before, definitly not on the scale of our proposed monopitch roof.
    Would there be special considerations to be taken into account if the marley was chosen. Would you say the metrotile is better for a guy not used to doing low pitch roofs?


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    #6
    rooferPete
    Registered Users Posts: 1,497 ✭✭✭rooferPete


    Hi,

    The Marley systems are fine they work well but only when the full Marley specification is followed.

    The Irish Building Regs call for a pitch of 25 degrees, this allows the tile to hang of the lath instead of putting downward pressure on the rafters / trusses and it allows the water to clear the roof fast with the proper head laps.

    The Metro Shingle is a light weight metal system that is fixed above the water line and each panel has a water check, it comes in different colours and more important it works.

    I can't give out prices on the www, in fact I don't even price work on the telephone, each job has different detailing that must be taken into account.

    Also I feel it would be wrong to disclose what is confidential information, sorry I can't help you there.

    What I can tell you is each system is competively priced and they do represent good value.


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    #7
    gregos
    Closed Accounts Posts: 314 ✭✭gregos


    rooferPete wrote:
    The Irish Building Regs call for a pitch of 25 degrees

    Hi Pete

    That's great information. I've looked through Technical Guidance Document C of the Building Regs and I can't find the reference to a 25-degree pitch. Which paragraph is that in?

    Thanks

    gregos


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    #8
    rooferPete
    Registered Users Posts: 1,497 ✭✭✭rooferPete


    Hi gregos,

    You probably wont find it because the standards are changing all the time and I doubt they include every detail.

    I would be notified because it's my specialist area, the other change that's probably not there is the pitch for slate roofs is now 30 degrees.

    The old system which is still acceptable in parts of the UK is 17.5 for tiles and 22.5 degrees for slates.

    I think the changes were brought in to keep in line with the truss roofs more than the cut roofs.

    What a lot of people don't know is water tracks back (capillary attraction) even on very steep slopes, for example my house is 45 degrees with a tile, if the tile is pushed back after rain, water can be seen having tracked back about 30 mm on the lower tile.

    There was a tile on the market a while back I think it was an expeiment by a North of Ireland company and it had a water check built in, a great idea but cost must have been a factor because I have only seen them twice.

    I think the new standard can be found on www.richmondbp.com (a preferred supplier) or www.tegral.com


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