Hi all,
I'm in the planning stages of a 2 storey rear extension. It will be rectangular in size, extending the kitchen on the ground floor and adding a bedroom on the 1st floor.
The property was built in 1938. The external walls are 2 (both brick) but there's no real cavity.
The extension will partly build a second storey on top of existing single storey. (I might need to use RSJ's in places depending on the foundations with I've not yet explored).
I've drawn a crude diagram showing the back of the existing house with the orange and green showing the existing structure and the blue line showing the extension.
Orange shows existing two storey structure whilst the green shows where the structure is one storey only. The extension will need to build on top of the existing single storey structure in two places.
Today's building standards would see a 2 skin wall obviously have an insulation filled cavity making the total thickness thicker than my existing wall. Would I be able to build on top of the existing walls as they are in those two places? If not then how would I achieve a compliant wall in those spots?
Thanks
Jon
I'm in the planning stages of a 2 storey rear extension. It will be rectangular in size, extending the kitchen on the ground floor and adding a bedroom on the 1st floor.
The property was built in 1938. The external walls are 2 (both brick) but there's no real cavity.
The extension will partly build a second storey on top of existing single storey. (I might need to use RSJ's in places depending on the foundations with I've not yet explored).
I've drawn a crude diagram showing the back of the existing house with the orange and green showing the existing structure and the blue line showing the extension.
Orange shows existing two storey structure whilst the green shows where the structure is one storey only. The extension will need to build on top of the existing single storey structure in two places.
Today's building standards would see a 2 skin wall obviously have an insulation filled cavity making the total thickness thicker than my existing wall. Would I be able to build on top of the existing walls as they are in those two places? If not then how would I achieve a compliant wall in those spots?
Thanks
Jon