CHJ
Established Member
Paul, Sand cement mortar mix will be fine, just leave it a couple of days to set well before you start impact drilling for the bench fixings. (or drill the holes in the top blocks before building them in) As the span of 'wall' is minimal and little or no chance of settlement movement having to be accommodated then make it a strong mix.
Your bench top will tie the top of the two pillars, and if you can incorporate a slim cupboard underneath the door framing will tie the front.
(you could use a concrete lintel between the two pillars to dampen the bench if you have one lying around the yard :lol: )
With your variable speed you should be able to find a sweet spot easier without the harmonics of the bench top joining in the chorus.
Your bench top will tie the top of the two pillars, and if you can incorporate a slim cupboard underneath the door framing will tie the front.
(you could use a concrete lintel between the two pillars to dampen the bench if you have one lying around the yard :lol: )
With your variable speed you should be able to find a sweet spot easier without the harmonics of the bench top joining in the chorus.