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Sealing a metal roof

Discussion in 'Roofing and Guttering' started by Isolde1, 9 Aug 2019.

  1. Isolde1

    Isolde1

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    Hi, I've just bought a house near Dumfries, that has a metal shed/lean to, attached to the external wall of the house. It's really handy, BUT there's a huge gap between the metal roof, and the wall, so everything inside gets wet (obviously!) when it rains. How can I seal the gap, and make it weatherproof? I've included pics of the "shed" and the gap. Thanks for any advice!
     

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  2. magicmushroom666

    magicmushroom666

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    I think you need a lead flashing that is cut into the wall
    [​IMG]
     
  3. Tigercubrider

    Tigercubrider

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    Flashing
    They (the roof manufacturer) may do a folded metal section that you could chase into the wall
     
  4. Isolde1

    Isolde1

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    Thanks for both your replies.
    It's just a corrugated metal roof, so I think getting someone to come and do that (flashing) would cost more than buying a new shed! Was hoping for a DIY solution, but maybe that's not an option.
     
  5. Harry Bloomfield

    Harry Bloomfield

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    You can buy stick on flashing on a roll, but how well it might stick to that wall is difficult to tell. Its made from some sort of plastic. I used some around ten years ago and its still going strong.

    I wonder why it was built with such a wide gap between it and the wall?
     
  6. Ker-plunk

    Ker-plunk

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    Flashband and 4x1" screwed to the sheeting and wall.
     
  7. Harry Bloomfield

    Harry Bloomfield

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  8. catlad

    catlad

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    Those metal roofs are prone to condensation so the gap may have been left on purpose.
     
  9. Harry Bloomfield

    Harry Bloomfield

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    Yes, but rain will hit the house wall and run down it into the shed.
     
  10. Tigercubrider

    Tigercubrider

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    That's why the flashing solder for the corrugated roof is basically a straight bit of metal, folded to meet the wall, but leaving each lower section open.
     
  11. Leofric

    Leofric

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    An abutment flashing to suit the profile of the roof sheeting, with a lead flashing turned into the wall and dressed over the upstand of the abutment flashing.
     
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