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Clematis and damp walls

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  • If it's single brick construction it'll transfer damp no matter what.
  • DovefromaboveDovefromabove Posts: 88,147
    If it's single brick construction it'll transfer damp no matter what.
    That’s why it’s important to use the right type of paint that allows the wall to ‘breathe’. 

    Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.





  • If it's single brick construction it'll transfer damp no matter what.
    That’s why it’s important to use the right type of paint that allows the wall to ‘breathe’. 
    It doesn't matter what you paint on, it'll still transfer damp through if it's single brick. That's why we have cavity walls in our houses now.
  • DovefromaboveDovefromabove Posts: 88,147
    If it's single brick construction it'll transfer damp no matter what.
    That’s why it’s important to use the right type of paint that allows the wall to ‘breathe’. 
    It doesn't matter what you paint on, it'll still transfer damp through if it's single brick. That's why we have cavity walls in our houses now.
    Yes … but if the brickwork is allowed to ‘breathe’ the dampness can evaporate rather than remain in the wall making the bricks deteriorate and aiding the paintwork to blister and flake. That’s how outbuildings and garages were built for years. 

    Many older houses and buildings were built in the same way … our business specialised in the restoration of ancient and old timber-framed buildings. I doubt whether you’ll find an old village church with a cavity wall 😉  … and yet the interior plasterwork of most remains sound for hundreds of years … because they were painted with a distemper or whitewash type paint which allows the bricks/stone/and lime plaster to breathe and for the damp to evaporate.

    It’s when buildings constructed in this way are painted with modern paints that damp problems often start. 
    😊 

    Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.





  • LoxleyLoxley Posts: 5,698
    I would imagine that somewhere the stem is causing moisture to be trapped when it rains and therefore penetrate the wall. In a garage I wouldn't have thought this is a major issue (other than a bit of flaking paint), but it depends what you store in there.
    "What is hateful to you, do not do to your neighbour". 
  • If it's single brick construction it'll transfer damp no matter what.
    That’s why it’s important to use the right type of paint that allows the wall to ‘breathe’. 
    It doesn't matter what you paint on, it'll still transfer damp through if it's single brick. That's why we have cavity walls in our houses now.
    Yes … but if the brickwork is allowed to ‘breathe’ the dampness can evaporate rather than remain in the wall making the bricks deteriorate and aiding the paintwork to blister and flake. That’s how outbuildings and garages were built for years. 

    Many older houses and buildings were built in the same way … our business specialised in the restoration of ancient and old timber-framed buildings. I doubt whether you’ll find an old village church with a cavity wall 😉  … and yet the interior plasterwork of most remains sound for hundreds of years … because they were painted with a distemper or whitewash type paint which allows the bricks/stone/and lime plaster to breathe and for the damp to evaporate.

    It’s when buildings constructed in this way are painted with modern paints that damp problems often start. 
    😊 
    After spending decades in the building and restoration game i'm well aware of how things work.
  • DovefromaboveDovefromabove Posts: 88,147
    edited August 2022
    You too eh? Then no doubt you agree with my explanation.   :D  

    I wonder whether the OP knows what sort of paint was used on his garage walls?  Few folk use traditional paints nowadays except in Listed buildings.   The problem is that it's not an easy mistake to correct.  

    Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.





  • Thanks for all your comments
  • Arthur1Arthur1 Posts: 542
    I have grown clematis for decades, in numerous houses. I have never heard of them causing damp.
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