blocks to use

[LSB]

moving on from my other post about foundations, I'm looking at the cavity walls above DPM

 

looking at these as an example https://www.travisperkins.co.uk/100mm-blocks/hh-celcon-standard-aerated-concrete-block-grey-3-6n-440mm-x-100mm-x-215mm/p/700055

 

Celcon say that these can be used in both internal and external walls, but is that just sales talk as I've been told previously that we need 7.3n for external and 3.6n is only useable inside.

Also, can you put external wooden cladding on these and render.

 

Thoughts please ???

 

PS, only getting quote from TP for now, but using this link as example.

 

HID likes these as they weigh about the same as a chunky kit kat 🙂

 

[Mike]

1 hour ago, LSB said:

Thoughts please ???

Aerated concrete blocks are notorious for cracking, even if all the recommended precautions are taken. I'd choose a medium density block instead.

[nod]

The type of block should be on your drawings 

[Kelvin]

As above will be specified in your SE drawings. Our foundation block needed to have a minimum compression strength of 7N/mm² and a minimum density of 750kg/mm³ so we chose the Mannok Aircrete 7. (7.5N and 760kg/mm³ ) 

Edited March 26, 2023 by Kelvin

[LSB]

I must have another look at the SE drawings, although all the text is handwritten and quite tricky to decipher in places.

The BCO is happy with them so guess it must be there somewhere.