Toplite 3.6n blocks below dpc ?

[Neil78]

Hi all
I've been told the above blocks are sufficient for use below dpc on a 2 storey side extensions. The concrete has been poured and it will take 3 blocks high to get to floor level. I looked on the tarmac website at the pdf file and it says they can be used below dpc. My question is would this be ok. Thanks Neil

 

[John D v2.0]

If the manufacturer says they're OK below dpc then go for it.

 

[^woody^]

But not for the frost layer - that's 450mm below DPC external leaf - use engineers for that.

 

[cjard]

Hi all
I've been told

By whom?

 

[tomfe]

I'd use engineers but:

Work below damp-proof course
3.1 The blocks are suitable for use in
situations up to and including A3 as defined
in Table 13 of BS 5628-3 : 2001.
.