During the kitchen renovation of our Victorian property we have revealed a large area ( about 30-35% ) of an external wall that was dry lined. There was once a chimney breast there that was removed over 20 years ago. Before we owned it and I assume the dry lining was a 'make good' following the removal of the breast. In this dry lined area the internal brickwork is about 2 inches back from the surrounding internal plasterwork which is mostly good. Whilst removing the wall tiles to that dry lined wall area resulting damage was done to the plasterboard to which the tiles were attached. The plasterboard was slightly damp through penetrating damp - pointing and roof verge tiles at roof level soon to be attended to. Due to this dampness I thought I'd remove all the plasterboard on the dry lined part of the wall and renew the dry lining with new plasterboard.
Then I read Building regulations regarding insulation to external walls that are to be re-plastered or part re-plastered.
Do I need to dry line the whole of this wall and install Kingspan etc to the parts that are currently good. I have difficulty interpreting the Approved Document for material changes and have no previous experience of this.
We are on a strictly limited budget and this could be an unexpected expense we were not aware of or prepared for.
How does a building inspector view this sort of situation.
We will be removing a small load bearing wall during the renovation of the kitchen so a buildings inspector will need to be involved during that job and I'm sure he would notice a large area of this external wall that had been replastered.
What are my options re the dry lined wall. Do I really have to renew and insulate all.
Thanks in advance for any replies.
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