loft conversions and party wall

[palmer1]

We are doing a loft conversion in a small stone cottage end of terrace, so only one party wall. The majority of the party wall from the ground floor up to the ceiling of the first floor seems to be of cob construction. The party wall in the loft area is just lath and plaster. To comply with Building Regs what do we have to do to the party wall in the loft? Does the lathe and plaster have to be removed and a proper wall built of block or bricks? Or do we simply use the plaster board and soundproofing in front of the existing wall? We would be grateful for any advice.

 

[^woody^]

There needs to be a wall of minimum 30 minutes fire resistance and insulated as per an external wall in terms of thermal and sound insulation

Whether you can adapt the existing or need to replace it, is something you need to discus with the inspector or your designer

 

[palmer1]

Thanks for that info. Does the work to our side of the party wall require us to notify our neighbour as per the requirements of the party wall act?

 

[DevilDamo]

It depends how minor the works are to the party wall. If you were simply dry lining, I don't think it will be a problem. However, if you're looking at cutting into the wall to support new beams/joists, then yes... a notice would have to be served. On that note, how is the new floor being supported?

 

[^woody^]

"Thickening" of a party wall is covered by the Act and will require a notice, as would demolition and rebuilding to conform to any statutory requirements or strengthening