A favourite of brutalism, these in-situ cast concrete walls always look impressive and weather ever so nicely with age.
Their simple look is deceiving though, as they are often difficult to pour and have a smooth finish, due to air getting trapped during the pour.
How to achieve amazing in-situ concrete finishes
Builders often use a special vibrator for concrete, wich can take most of those trapped bubles out of the wet concrete.
Yes always tricky, recently I actually saw a project, where they cast the wall panels off site, in order to achieve a similar finish, them moved them to the final site.