Here is a pic of our semi detached house being thrown up. For reasons of economy I guess they used the cheaper grey blocks full of spaces for the party wall.
I did have a second party wall constructed downstairs but as they did not do it as agreed (never did with a cavity) I did not have the upstairs double walled. It was a struggle to get them to do the downstairs anyway, but i am glad I did due to poor sound insulation.
The problem is normal sounds coming through the bedroom wall, get woken when next door get up so want to put another wall upstairs, at least in the front bedroom. In the pic you can see the party wall in the room on the left half built up to the first pillar. Question is would the construction of the house take the weight of another wall upstairs? it would be on the beam (just), also, use the same grey bricks or not?
I realise it would not be a perfect solution as would only take the wall up to the existing ceiling and not through the roof space, but something would be better than nothing.
better view
finished house, nice but noisy!
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