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Internally Insulating an Old Building

  • 23-05-2020 4:44pm
    #1
    kieran--f
    Registered Users Posts: 84 ✭✭


    I'm looking for advice from any seasoned experts or people in the know on how to prevent rising damp within existing old buildings being re-developed.
    The house I recently bought to fix up is a small 2-storey mid terrace house, built around 1900-1920 I would guess.
    I am considering internal insulation. The existing walls are 600mm solid masonry walls with lime plaster on the inside. The existing floor appears to be poured cement throughout although in one room where I have pulled the carpet there are sheets of plywood laid, I'm not sure what this is for.
    In order to make the house cheaper to heat, of course improve the BER and house value my initial thoughts were to fix 40mm wood fibre insulation direct to the front and back walls of the house internally (no vapour barrier), covered with lime plaster again. This would provide a better U value overall and retain the walls permeability. (the side walls are shared with occupied building so these wont be required for the BER).
    The attic will be filled between the rafters with regular fiberglass insulation, unless anyone has a suggestion?

    The floors I was considering leaving but since I will pull up all the carpet I am considering a thin 16mm sheet of wood fibre insulation again. I am not sure if a vapour membrane would be recommended below this?
    Any advice would be appreciated as the house is completely damp free, not a bit of evidence of rising damp anywhere even though it has not been occupied for at least 5 years. I am very cautious of messing with the houses "environment" given that their is no issues with damp, but don't want to cause any issues now with my intentions to reduce the gas bill.
    My aim isn't to achieve a w/m2 here that would allow the heating system to be replaced with a heat pump as there is natural gas to the premises. Thought this may become something necessary in the future, so the house could be prepared. Below are some photos of the property
    https://imgur.com/2h5NxCl
    https://imgur.com/PR2P8ZP
    https://imgur.com/SQgKDJG
    https://imgur.com/3Bq3sLA
    https://imgur.com/VusJHIR


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