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Roof still leaking

  • 26-03-2016 9:19am
    #1
    little_monty
    Registered Users, Registered Users 2 Posts: 58 ✭✭


    Just looking for some advice on leaking roof.

    Its a ~25 year old tiled roof and the leak is happening at the valley between 2 roofs (L shaped house).
    The leak has being repaired 4 times now (i dont blame the builder who repaired it as i believe there were multiple issues with it)

    Anyway the semi-good news after the latest repair is the felt is at least doing its job and no water is getting into the attic itself (at least so far)

    What i can see when raining is a slow drip of water getting in somewhere at edge of the valley, and running down along top edge of valley, wetting the ends of the tile battons as it goes down and as far as i can the felt brings it out into the gutters.

    I'm loathe to interfere with it again for now, especially as attic is keeping dry. Will i get away with this for a couple of years at least ?


Comments

  • #2
    Bonzo Delaney
    Registered Users, Registered Users 2 Posts: 1,577 ✭✭✭Bonzo Delaney


    little_monty wrote: »
    Just looking for some advice on leaking roof.

    Its a ~25 year old tiled roof and the leak is happening at the valley between 2 roofs (L shaped house).
    The leak has being repaired 4 times now (i dont blame the builder who repaired it as i believe there were multiple issues with it)

    Anyway the semi-good news after the latest repair is the felt is at least doing its job and no water is getting into the attic itself (at least so far)

    What i can see when raining is a slow drip of water getting in somewhere at edge of the valley, and running down along top edge of valley, wetting the ends of the tile battons as it goes down and as far as i can the felt brings it out into the gutters.

    I'm loathe to interfere with it again for now, especially as attic is keeping dry. Will i get away with this for a couple of years at least ?

    Was the lead replaced in 1.8 m lengths
    Is the rain coming in under the lead if so there must be a cracked / broken ridge , tile or slate somewhere letting water in
    If it's a low pitched valley less than 22degrees there could be issues with rain blowing back in to the roof of the lead isn't turned up under the tile/slate.


  • #3
    little_monty
    Registered Users, Registered Users 2 Posts: 58 ✭✭little_monty


    The full length of the lead was replaced.
    It doesn't seem like the rain is getting in through the valley itself
    I think its coming through the tiles on the edge of the valley.

    After the roofer replaced the valley and did the mortar work, he actually blocked off some of the joints at the bottom where 2 tiles overlap as they hit the valley

    (possibly as tiles not sit perfectly flat as they hit the valley)

    ||||//
    |||//
    ||//
    |//

    I think the water running down the overlap of 2 tiles is blocked by mortar at the bottom at the valley edge and some of this is getting under the tile overlap and onto the felt layer

    Is this possible ? Should tiles be 'sealed' at the bottom where they meet a valley ?

    (The pitch of the roof is decent, and there is ~2 inches overlap between layers of tiles so i dont think water is blowing up under tile either.


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