20mm stone paviours outside. - Tile Advice

[Time's Ran Out]

Stone supplier has recommended fitting their 20mm (900x600) stone outside on a 50mm sand/cement bed over hardcore. Sbr slurry on the back to reduce staining.
Anyone believe this is a correct method of installation or what are your alternatives.
Your thoughts please.

 

[J Sid]

I used to put the slurry mix on the 'semi dry' (just holds together when gripped in the hand) sand and cement.
lay sand and cement 20mm high and tap stone down to bed.

 

[Time's Ran Out]

Thanks @JulianSidney - no one else got any thoughts?

 

[J Sid]

nobody brave enough to give an old timer advice, me I'm just being a rebel this week

 

[Italy]

If you could figure out what it says the old....

 

[Blunt Tool]

Stone supplier has recommended fitting their 20mm (900x600) stone outside on a 50mm sand/cement bed over hardcore. Sbr slurry on the back to reduce staining.
Anyone believe this is a correct method of installation or what are your alternatives.
Your thoughts please.

I did one last year in the summer, same size. Is it Mandarin stone? Did it like @JulianSidney said in stretches. What have they recommended for grout?

 

[Andy Allen]

Bal green star...

 

[One Day]

What's the stone?

 

[Time's Ran Out]

I did one last year in the summer, same size. Is it Mandarin stone? Did it like @JulianSidney said in stretches. What have they recommended for grout?

It'll be a dry mix wetted!

 

[Time's Ran Out]

What's the stone?

Best part of this one - don't know !
Possibly a Dijon limestone.

 

[Flintstone]

I can talk to you about Dijon mustard if that's any help?

 

[Blunt Tool]

It'll be a dry mix wetted!

It was Mandarin Stone I laid, hammered finish limestone, 5mm joints laid into 24:1 sharp sand and cement, semi dry with SBR slurry done in stretches. The grout was hand made soft washed sand, snowcrete and yellow colouring. I sprinkled water into the joints then soft brushed the dry mix into joints, then compacted with trowel. The mix pulls the water up then after a time pointed and brushed away excess.

 

[Old Mod]

Do you know why it was spec'd that way John?

 

[Blunt Tool]

Stone supplier has recommended fitting their 20mm (900x600) stone outside on a 50mm sand/cement bed over hardcore. Sbr slurry on the back to reduce staining.
Anyone believe this is a correct method of installation or what are your alternatives.
Your thoughts please.

Forgot to say regards the hardcore, I got the contractors to roll it tight, then put in a 1 inch bed of sharp sand raked and rolled tight then dampened and used building paper!

 

[J Sid]

It was Mandarin Stone I laid, hammered finish limestone, 5mm joints laid into 24:1 sharp sand and cement, semi dry with SBR slurry done in stretches. The grout was hand made soft washed sand, snowcrete and yellow colouring. I sprinkled water into the joints then soft brushed the dry mix into joints, then compacted with trowel. The mix pulls the water up then after a time pointed and brushed away excess.

I would do a much stronger mix for the sand and cement 10 or 8 : 1