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Installing Celotex PL4000

Discussion in 'Plastering and Rendering' started by lasors, 21 Jan 2016.

  1. lasors

    lasors

    Joined:
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    Hello,

    The third bedroom of our home is quite cold, it has 3 external walls and two windows. It's a 1930s house with solid walls and as it needs some wiring and redecorating I'm going to take the opportunity to improve the insulation to the external walls with Celotex PL4000.

    Firstly, should I remove all the old plaster, down to the brick, before installing? What difference does it make if I do, if any? It's a small room already (10sqm) so even saving the loss of space by putting it all on top of the existing walls would be beneficial.

    Does it make any difference installing using dot and dab vs battening?

    Any advice using this product appreciated!

    Many thanks
     
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  3. stevethespreader

    stevethespreader

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    Using dotand dab on external solid walls could lead to damp and cold spots you can batten straight over old plaster
     
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