The Brew Cabin

Posted: **Tue Aug 31, 2010 6:31 pm**

Hi all. I'm about to build a short (2m) flag-on-edge wall. I understand how it works apart from one aspect. Should I initially lay a flat footing, then when that is set arrange the flags, haunching and back-filling, or should the slabs be set into wet concrete? The problem I see with the latter is the slabs sinking to different levels, with the former, losing strength at the 'join' of the two lots of concrete. Any advice appreciated.

thanks,

Posted: **Tue Aug 31, 2010 6:43 pm**

the slabs need to be laid slightly off vertical in a dry lean type concrete about 300mm thick
once this has been done they can be haunched but must be left for 24 hrs before being backfilled
cheers LLL

Posted: **Tue Aug 31, 2010 9:02 pm**

No need for a footing just bed them on 100mm of dryish concrete and haunch them with a sticky wet concrete to hold them in place.

Posted: **Wed Sep 01, 2010 8:36 am**

Thanks guys - just what I needed to know.

The Brew Cabin

Flag-on edge retaining wall