Block sizes

[LSB]

We are converting an old barn, with the existing walls build from block.

But, the barn was built in the 60's so the blocks are imperial.

Does anyone know what is the difference, yes I could go and measure, but it's dark, wet and cold.

We have to partially knock down and rebuild some of them, we would do it all, but the LPA say no.

Can anyone foresee any issues with walls have mixed blocks.

The walls are going to be plastered inside and cladded outside.

 

[tonyshouse]

Just slightly bigger mortar beds to go from metric to imperial cf  225mm to 9”