Welcome to the AECB Forums Building Refurbishment and Retrofit Internal wall insulation – testing existing render/paint

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    Jacob Kelly
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    I’m looking into using a wood fibre insulation on the inside of an existing 3-course thick solid brick wall but the existing walls are already rendered 25-30mm think and painted. The building has been used for over ten years and would not have been repainted for some time before that.

    Is there any way I can test/assess the render/paint to confirm whether it is lime based (i.e. breathable) or would removing it be the best solution?

    Many thanks,

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