Joint sizes - Sandstone

[Thepinkpavingco]

Hi all. New to this forum lark, just a quick question with regards to joint sizes. I have layed a hell of alot of sandstone in the past 8 years from many different manufacturers ie bretts,marshals etc and I can never seem to get a relatively (what I would call) small joint. I regularly end up with joints around 20mm wide which I almost all the time bird beak using a 3:1 mix of rendering sand and cement injected through point master gun. Would love to give rompox a go but joints always seem to big for a brushed finish. Thanks
Think paving,think pink!

[lutonlagerlout]

this should help
i prefer easipoint myself,dont know how you manage to get normal mortar flowing through the gun
never works for me
cheers LLL

[Thepinkpavingco]

Took me a long time to get it right but stuck with it. the only reason I use the rendering sand is because of the colour really, I hate standard mortar colour on slabs and it always cracks,
sharp sand definitely will not go through

[Bob_A]

I've not seen rendering sand on sale locally. how would you describe it.
Is it the same as plastering sand?

[lutonlagerlout]

it is indeed bob
i fancy a go myself
its sharper than building sand but not as coarse as grit sand
LLL

[Pablo]

This is a job I recently did with a pretty cheap and poorly calibrated and sized sandstone that was pointed with Rompox easy. The stone you seem to be able to get is much better quality so it should be easy too tighten the joints up just need to nip the odd one here and there. Using a brush doesn't leave marks on the rompox in the same way it does on normal mortar. If you mist the paving with water as you go and have one fella pushing it in and another on a soft brush at 45deg it leaves it pretty smooth and level with the surface. Most of my pointing mortar is plastering sand and I to find that you need a good dose of plasticiser to get it flowing well I would also use it for slurry aswell.

[pickwell paving]

I regularly end up with joints around 20mm wide which I almost all the time bird beak using a 3:1 mix of rendering sand and cement injected through point master gun.

Is that the yellow one with the plunger handle instead of the trigger gun? We've just bought one to try and its at least twice as fast trowel in method, we also use plastering sand and plenty of plasticiser.