3.6n or 7.3n Foundation trenchblock

[techcs]

Hi All,

I'm looking to build my blockwork up to DPC and I have a simple question which I cannot seem to find an answer..

I am building a double storey extension and need to know if I will be able to user 3.6 or 7.3n blocks in the foundation.

Documentation states 3.6n will be fine but wanted someone else's experience.

I will be using trenchblock.

Thanks all...

Col

 

[techcs]

Actually, is this why I'm paying building control? Can they advise me?

Col

 

[^woody^]

3.6 are OK for two storeys

 

[techcs]

Thanks Woody... much appreciated

Col